| Date: | 06/16/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | McLaughlin, D. |
| Title: | Recent developments in hydrologic data assimilation |
| Publication: | Prepared for the U.S. National Report to the IUGG (1991-1994) |
| Abstract: | NO ABSTRACT |
| Location: | 2
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| Record ID: | 31/1 |
| Date: | 04/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Xu, Q., C.-J. Qiu |
| Title: | Simple adjoint methods for single-Doppler wind analysis with a strong constraint of mass conservation |
| Publication: | J. Atmos. Ocean. Tech., 11, 289-298 |
| Abstract: | Three schemes are developed to incorporate a strong constraint of (imcompressible) mass conservation into the basic scheme (scheme B) of the simple adjoint method of Qiu and Xu fro retrieving the time-mean wind field from a sequence of single-Doppler scans. |
| Location: | 1
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| Record ID: | 31/2 |
| Date: | 04/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Xu, Q., C.-J. Qiu, J.-X. Yu |
| Title: | Adjoint-method retrievals of low-altitude wind fields from single-Doppler reflectivity measured during Phoenix II |
| Publication: | J. Atmos. Ocean Tech., 11, 275-288 |
| Abstract: | The simple adjoint method of Qiu and Xu is upgraded and tested with the Phoenix II data for retrieving the low-latitude winds from the movements of reflectivity patterns measured by a single-Doppler radar. |
| Location: | 1
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| Record ID: | 31/3 |
| Date: | 11/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Miller, R.N., E.D. Zaron, A.F. Bennett |
| Title: | Data Assimilation in models with convective adjustment |
| Publication: | Mon. Wea. Rev., 122, 2607-2613 |
| Abstract: | Practical hydrostatic ocean models are often restricted to statically stable configurations by the use of a convective adjustment. A common way to do this is to assign an infinite heat conductivity to the water at a given level if the water column should become statically unstable. This is implemented in the form of a switch. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/4 |
| Date: | 11/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Sun, J., L. Mahrt |
| Title: | Spatial distribution of surface fluxes estimated from remotely sensed variables. |
| Publication: | J. Appl. Met., 33, 1341-1353 |
| Abstract: | This study relates surface fluxes to remotely sensed variables over well-defined variations of surface wetness and vegetation. The surface fluxes are estimated from repeated Twin Otter aircraft flights at 33 m above the surface after correcting for advection and local storage between the aircraft level and the surface. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/5 |
| Date: | 12/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | McNider, R.T., A.J. Song, D.M. Casey, P.J. Wetzel, W. L. Crosson, R.M. Rabin |
| Title: | Toward a dynamic-thermodynamic assimilation of satellite surface temperature in numerical atmospheric models |
| Publication: | Mon. Wea. Rev., 122, 2784-2803 |
| Abstract: | An assimilation technique is described in which satellite-observed surface skin temperature tendencies are used in a model surface energy budget so that the predicted rate of temperature change in the model more closely agrees with the satellite observations. Both visible and infrared GOES satellite data are used in the assimilation. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/6 |
| Date: | 12/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Barnes, S.L. |
| Title: | Applications of the Barnes objective analysis scheme. Part I: Effects of undersampling, wave position, and station randomness |
| Publication: | J. Atmos. Ocean. Tech., 11, 1433-1448 |
| Abstract: | An empirical approach is employed to investigate the accuracy of the Barnes successive corrections objective analysis scheme for discrete samples obtained from a simple sinusoidal function in a two-dimensional domain. |
| Location: | 1
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| Record ID: | 31/7 |
| Date: | 12/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Barnes, S.L. |
| Title: | Applications of the Barnes objective analysis scheme. Part II: Improving derivative estimates. |
| Publication: | J. Atmos. Ocean. Tech., 11, 1449-1458 |
| Abstract: | Two recently published objective analysis schemes improve derivative estimates obtained from observed field variables. |
| Location: | 1
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| Record ID: | 31/8 |
| Date: | 12/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Barnes, S.L. |
| Title: | Applications of the Barnes objective analysis scheme. Part III: Tuning for minimum error |
| Publication: | J. Atmos. Ocean Tech, 11, 1459-1479 |
| Abstract: | Procedures for tuning a successive corrections objective analysis scheme, described in Part I, are applied to the array of North American rawinsonde stations. |
| Location: | 1
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| Record ID: | 31/9 |
| Date: | 01/01/1995 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Zou, J., G. Holloway |
| Title: | Improving steady-state fit of dynamics to data using adjoint equation for gradient preconditioning. |
| Publication: | Mon. Wea. Rev., 123, 199-211. |
| Abstract: | The steady-state fit of Arakawa and Lamb's shallow-water equation model to time-mean sea surface height (SSH) has been examined, seeking better performance of the steady-state fit without requiring longer time integrations. It is shown that the minimization problem with steadiness penalties involving one time step is ill conditioned. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/10 |
| Date: | 02/01/1995 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Raymond, W.H., W.S. Olson, G. Callan |
| Title: | Diabatic forcing and initialization with assimilation of cloud water and rainwater in a forecast model |
| Publication: | Mon. Wea. Rev., 123, 366-382 |
| Abstract: | In this study, diabatic initialization, diabatic forcing, and liquid water assimilation techniques are tested in a semi-implicit hydrostatic regional forecast model containing explicit representations of grid-scale cloud water and rainwater. Diabatic forcing, in conjunction with diabatic contributions in the initialization, is found to help the forecast retain the diabatic signal found in the liquid water or heating rate data... |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/11 |
| Date: | 02/01/1995 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Ritchie, H., C. Temperton, A. Simmons, M. Hortal, T. Davies, D. Dent, M. Hamrud |
| Title: | Implementation of the semi-Lagrangian method in a high resolution version of the ECMWF forecast model. |
| Publication: | Mon. Wea. Rev., 123, 489-514 |
| Abstract: | In this article the implementation of the semi-Lagrangian method in a high-resolution version of the ECMWF forecast model is examined. Novel aspects include the application of the semi-Lagrangian shceme to a global model using the ECMWF hybrid coordinate in the vertical and its use in a baroclinic spectral model in conjunction with a reduced Gaussian grid in the horzontal. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/12 |
| Date: | 03/00/1995 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Vukicevic, T., K. Raeder |
| Title: | Use of an adjoint model for finding triggers for alpine lee cyclogenesis |
| Publication: | Mon. Wea. Rev., 123, 800-816 |
| Abstract: | The authors propose a new procedure, designated the adjoint-based genesis diagnostic (AGD) procedure, for studying triggering mechanisms and the subsequent genesis of the synoptic phenomena of interest. This procedure makes use of a numerical model sensitivity to initial conditions and the nonlinear evolution of the initial perturbations that are designed using this sensitivity. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/13 |
| Date: | 03/00/1995 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Yap, K.-S. |
| Title: | Impact of a Newtonian assimilation and physical initialization on the initialization and prediction by a tropical mesoscale model |
| Publication: | Mon. Wea. Rev., 123, 833-861 |
| Abstract: | This study illustrates the capability of Newtonian nudging and physical initialization in improving the initialized state and forecasts in the Florida State University high-resolution regional tropical mesoscale model. In particular it is shown that this form of initialization leads to major improvement in the precipitation forecasts. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/14 |
| Date: | 02/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Achtemeier, G.L. |
| Title: | Contrasts in objective analysis philosophy: Comments on ``The theoretical, discrete, and actual response of the Barnes objective analysis scheme for one- and two-dimensional fields' |
| Publication: | Mon. Wea. Rev., 122, 397-398 |
| Abstract: | None |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/15 |
| Date: | 07/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Bender, M.A., R.J. Ross, R.E. Tuleya and Y. Kurihara |
| Title: | Improvements in tropical cyclone track and intensity forecasts using the GFDL initialization system |
| Publication: | Mon. Wea. Rev., 121, 2046-2061 |
| Abstract: | The initialization scheme designed at GFDL to specify a more realistic initial storm structure of tropical cyclones was tested on four real data cases using the GFDL high-resolution multiply nested moveable mesh hurricane |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/16 |
| Date: | 04/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Barkmeijer, J. |
| Title: | Local skill prediction for the ECMWF model using adjoint techniques |
| Publication: | Mon. Wea. Rev., 121, 1262-1268 |
| Abstract: | Two experiments are performed to predict the regional forecast skill over western Europa using a three-level quasi-geostrophic model with truncation T21 (T21QG). The predictor of skill, the maximal forecast error over the area of consideration, is obtained assuming linear error growth, no model error, and the use of the tangent and ajoint of the T21QG model. |
| Location: | 1
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| Record ID: | 31/17 |
| Date: | 07/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Bejamin, S.G. |
| Title: | An isentropic meso-alpha-scale analysis system and its sensitivity to aircraft and surface observations |
| Publication: | Mon. Wea. Rev., 117, 1586-1603 |
| Abstract: | An objective analysis scheme for meteorological variables on constant potential temperature surfaces is presented |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/18 |
| Date: | 09/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Bijlsma, S.J. |
| Title: | Insensitivity of the nonlinear normal model initialization of a limited area model to the inclusion of nonstationary Rossby modes |
| Publication: | Mon. Wea. Rev., 117, 2011-2018 |
| Abstract: | Application of the nonlinear normal mode initilization method requires the contruction of the normal modes of the linearized model equations |
| Location: | 0
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| Record ID: | 31/19 |
| Date: | 04/01/1991 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Bijlsma, S.J. |
| Title: | Nonlinear normal model initialization of a limited-area model: Inclusion of all beta terms in the linearized model equations |
| Publication: | Mon. Wea. Rev., 119, 907-916 |
| Abstract: | A nonlinear normal model initialization method with all of the beta term sincluded in the linearized model equations is formulated for a limited-area model. It is the extension of an earlier method examining the sensitivity |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/20 |
| Date: | 01/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Chang, S.W., T.R. Hold |
| Title: | Impact of assimilating SSM/I rainfall rates on numerical prediction of winter cyclones |
| Publication: | Mon. Wea. Rev., 122, 151-164 |
| Abstract: | A series of observing system simulation experiments (OSSE) and real data assimilation experiments were conducted to assess the impact of assimilation Special Senor Microwave/Imager (SSM/I)-estimated rainfall rates on limited-area model |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/21 |
| Date: | 08/01/1991 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Cohn, S.E., D.F. Parrish |
| Title: | The behavior of forecast covariances for a Kalman filter in two dimensions |
| Publication: | Mon. Wea. Rev., 119, 1757-1785 |
| Abstract: | A Kalman filter algorithm is implmented for a linearized shallow-water model over the continental United States. It is used to assimilate simulated data from the existing radiosonde network, from the demonstration network of 31 Doppler wind profilers in the central United States, and from hypothetical |
| Location: | 0
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| Record ID: | 31/22 |
| Date: | 04/01/1991 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Cram, J.M., M.L. Kaplan, C.A. Mattocks, J.W. Zack |
| Title: | The use and analysis of profiler winds to derive mesoscale height and temperature fields: Simulation and real-data experiments |
| Publication: | Mon. Wea. Rev., 119, 1040-1056 |
| Abstract: | Conventional synoptic rawinsonder data do not have a fine enought temporal or spatial resolution to accurately resolve mesoscale features. Profiling networks are one potential source of these data although they provide only wind information. A methodology following Fankhauser and Kuo and Anthes is ised to retrieve height and temperature analyses from actual profiler |
| Location: | 0
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| Record ID: | 31/23 |
| Date: | 06/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Crook, A. |
| Title: | Numerical simulations initialized with radar-derived winds. Part I: Simulated data experiments |
| Publication: | Mon. Wea. Rev., 122, 1189-1203 |
| Abstract: | Techniques to initialize the boundary layer in a numerical model with radar-drived wind fields are tested with simulated data of gust front. Experiments show that Newtonian relaxation or ``nudging' applied to the velocity fiels is not capable of retrieving the buoyancy in the gust front. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/24 |
| Date: | 06/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Crook, A., J.D. Tuttle |
| Title: | Numerical simulations initialized with radar-derived winds. Part II: Forecasts of three gust-front cases |
| Publication: | Mon. Wea. Rev., 122, 1204-1217 |
| Abstract: | Numerical simulations of three gust-front cases that occurred in northeastern Colorado during the summer of 1991 and 1992 are presented. The simulations are initialized with radar-derived winds and, for the two cases in 1992, measurements from a surface mesonet. Thermodynamic retrieval is used to calculate the buoyancy in the boundary layer. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/25 |
| Date: | 05/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Daley, R., R. Menard |
| Title: | Spectral characteristics of Kalman filter systems for atmospheric data assimilation |
| Publication: | Mon. Wea. Rev., 121, 1554-1565 |
| Abstract: | In recent years, there has been increasing interest in the application of Kalman filter systems to atmospheric data assimilation. One important aspect of any data assimilation system is its filtering properties. This is examined by spectral decomposition of a simple one-dimensional Kalman filter system. |
| Location: | 1
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| Record ID: | 31/26 |
| Date: | 11/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Derber, J. |
| Title: | A variational continuous assimilation techniqe |
| Publication: | Mon. Wea. Rev., 117, 2437-2446 |
| Abstract: | A variational assimilation technique is presented which continuously adjusts a model solution by introducing a correction term to the model equtions. The technique is essentially a modification of the adjoint technique. The variations continuous assimulation (VCA) technique optimizes |
| Location: | 0
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| Record ID: | 31/27 |
| Date: | 02/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Errico, R.M., T.E. Rosmond, J.S. Goerss |
| Title: | A comparison of analysis and initialization increments in an operational data-assimilation system |
| Publication: | Mon. Wea. Rev., 121, 579-588 |
| Abstract: | We have compared analysis increments produced by the optimal interpolation scheme and initialization increments produced by the nonlinear normal-model initialization scheme in the U.S. Navy Operational Global Atmospheric Prediction Scheme. Results indicate that analysis increments of height in the tropics are partially |
| Location: | 1
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| Record ID: | 31/28 |
| Date: | 08/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Errico, R.M., T. Vukicevic |
| Title: | Sensitivity analysis using an adjoint of the PSU-NCAR Mesoscale Model |
| Publication: | Mon. Wea. Rev., 120, 1644-1660 |
| Abstract: | A numerical method for analyzing and forecasting a wide range of horizontal scales of motion is tested in a barotropic hurricane track forecast mode. The numerical method uses cubic B-Spline representations of variables on the nested domains. The spline represention |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/29 |
| Date: | 03/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Filiberti, M.A., L. Eymard, B. Urban |
| Title: | Assimilation of satellite precipitable water in a meteorological forecast model |
| Publication: | Mon. Wea. Rev., 122, 486-506 |
| Abstract: | The lack of local humidity observations over a large portion of the globe hinders any improvement of humidity forecasting in meteorological models. However, satellite microwave radiometers routinely provide fields of precipitable water content over the oceans, with a horizontal resolution of a few tens of |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/30 |
| Date: | 10/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Fillion, L., C. Temperton |
| Title: | Variational implicit normal mode initialization |
| Publication: | Mon. Wea. Rev., 117, 2219-2229 |
| Abstract: | It is shown that implicit normal model initialization can be combined with a variational technique in order to control the relative magnitudes of the changes to the analyzed mass and wind fields. |
| Location: | 0
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| Record ID: | 31/31 |
| Date: | 04/00/1995 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Zupanski, D. F. Mesinger |
| Title: | Four-dimensional variational assimilation of precipitation data |
| Publication: | Mon. Wea. Rev., 123, 1112-1127 |
| Abstract: | The benefits of assimilation of precipitation data had been demonstrated in diabatic initialization and nudging-type experiments some years ago. In four-dimensional viariational (4DVAR) data assimilation, however, the precipitation data have not yet been used. To correctly assimilate the precipitation data by the 4DVAR technique, the problems related to the first-order discontinuities in the 'full-physics' forecast should be solved first. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/32 |
| Date: | 08/01/1991 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Fleming, H.E., D.S. Crosby, M.D. Goldberg |
| Title: | Efficiency as a function of layer thickenss |
| Publication: | J. Appl. Met., 30, 1237-1242 |
| Abstract: | Layer-mean virtual temperatures retrieved from satellite measurements are more accurate than retrievals at specific pressures, not only because an averaging process is involved, but also because of advantages in the retrieval process. In this note, a |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/33 |
| Date: | 01/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Garand, L. |
| Title: | A pattern of recognition technique for retrieving humidity profiles from Meteosat or GOES imagery |
| Publication: | J. Appl. Met., 32, 1592-1607 |
| Abstract: | A retrieval technique based on cloud classification is designed to derive humidity profiles from Meteosat visibile (VIS), Infrared window (IR), and water vapor (WV) channels, or equilvante sensors available on other satellites. |
| Location: | 1
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| Record ID: | 31/34 |
| Date: | 05/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Huang, X.Y., A. Cederskov, E. Kallen |
| Title: | A comparison between digital filtering initialization and nonlinear normal-mode initialization in a data assimilation system |
| Publication: | Mon. Wea. Rev., 122, 1001-1015 |
| Abstract: | The objective of this study is to examine the performance of th adiabatic digital filtering initialization scheme of Lynch and Huang, the diabatic digital filtering initialization scheme of Huang and Lynch, and the diabatic nonlinear normal-mode initialization scheme of Cederskov in a complete data |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/35 |
| Date: | 10/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Huang, X.Y., H. Sundqvist |
| Title: | Initialization of cloud water content and cloud cover for numerical predication models |
| Publication: | Mon. Wea. Rev., 121, 2719-2726 |
| Abstract: | An initialization scheme for numerical models containing treatment of cloudiness is presented. The dynamic type of initialization scheme is based on the digital filtering technique, which requires integration of the model backward and forward about |
| Location: | 1
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| Record ID: | 31/36 |
| Date: | 12/01/1991 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Kapitza, H. |
| Title: | Numerical experiments with the adjoint of a nonhydrostatic mesoscale model |
| Publication: | Mon. Wea. Rev., 119, 2993-3011 |
| Abstract: | For the purpose of assimilation of radar data into a nonhydrstatic mesoscale forecast model, the adjoint method is considered. For the case of dry convection, a set of identical twin experiments shows that it is possible to construct the temperature only moderately well from |
| Location: | 0
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| Record ID: | 31/37 |
| Date: | 09/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Kitzmiller, D.H., W.E. McGovern |
| Title: | VAS retrievals as a source of information for convective weather forecasts: An objective assessment and comparison with other sources of upper-air observations |
| Publication: | Mon. Wea. Rev., 117, 2095-2109 |
| Abstract: | Objective experiment have been carried out to determine which moisture and stability indices as derived from VISSR Atmospheric Sounder (VAS) contain the greatest amount of predictive information with respect to thunderstorm |
| Location: | 0
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| Record ID: | 31/38 |
| Date: | 06/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Lewis, J., C. Hayden, J. Derber |
| Title: | A method for combining radiances and wind shear to define the temperature structure of the atmosphere |
| Publication: | Mon. Wea. Rev., 117, 1193-1207 |
| Abstract: | The retrieval of temperature from satellite-observed radiances has traditionally been addressed as a one-dimensional or columnar problem which uses a guess profile of temperature |
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| Record ID: | 31/39 |
| Date: | 05/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Li, Y., I. M. Navon, W. Yang, X. Zou, J.R. Bates, S. Moorthi, R.W. Higgins |
| Title: | Four-dimensional variational data assimilation expeirments with a multilevel semi-Lagrangian semi-implicit general circulation model |
| Publication: | Mon. Wea. Rev., 122, 966-983 |
| Abstract: | Four-dimensional variational data assimilation (VDA) experiments have been carried out using the adaiabatic version of the NASA/Goddard Laboratory for Atmospheres semi-Lagrangian semi-implicit (SLSI) multilevel general circulation model. The limited |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/40 |
| Date: | 10/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Lin, Y., P.S. Ray, K.W. Johnson |
| Title: | Initialization of a modeled convective storm using Doppler radar-derived fields |
| Publication: | Mon. Wea. Rev., 121, 2757-2775 |
| Abstract: | A method is developed to initialize convective storm simulations with Doppler radar-derived fields. Input fields for initialization include velocity, rainwater derived from radar reflectivity, the pressure and temperature fields obtained through thermodynamic retrieval |
| Location: | 1
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| Record ID: | 31/41 |
| Date: | 06/01/1990 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Lipton, A.E., T.H. Vonder Haar |
| Title: | Preconvective mesoscale analysis over irregular terrain with a satellite-model coupled system |
| Publication: | Mon. Wea. Rev., 118, 13380-1358 |
| Abstract: | Influences on the mesoscale distribution of summertime convective cloud development in the northeastern Colorado region are described using a new system for time-continuous mesoscale anlysis. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/42 |
| Date: | 06/01/1990 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Lipton, A.E., T.H. Vonder Haar |
| Title: | Mesoscale analysis by numerical modeling coupled with sounding retrieval from satellites |
| Publication: | Mon. Wea. Rev., 118, 1308-1329 |
| Abstract: | The development and evaluation of a system for time-continuous mesoscale analysis is presented, with a focus on retrieving water vapor concentrations and ground surface temperatures from VISSR Atmospheric Sounder (VAS) data. The analysis system is distinguished by an intimate coupling |
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| Record ID: | 31/43 |
| Date: | 10/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Louis, J.F., R.N. Hoffman, T. Nehrkorn, D. Norquist |
| Title: | Observing system experiments using the AFGL four-dimensional data assimilation system |
| Publication: | Mon. Wea. Rev., 117, 2186-2203 |
| Abstract: | Five observing system experiments have been performed with the Air Force Geophysics Laboratory global data simulation system (GDAS). Each experiment includes one week of data assimilation during each of the two special observing periods of the First GARP Global Experiment (FGGE) of 1979, a three 4-day forecasts. The first experiment |
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| Record ID: | 31/44 |
| Date: | 02/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Manobianco, J., S. Koch, V. M. Karyampudi, A.J. Negri |
| Title: | The impact of assimilating satellite-derived precipitaiton rates on numerical simulations of the ERICA IOP 4 cyclone |
| Publication: | Mon. Wea. Rev., 122, 341-365 |
| Abstract: | The present study uses a regional-scale numerical model to test the impact of dynamically assimilating satellite-derived precipitaiton rates on the numerical simulations of one of the deepest extratropical cyclones to develop south of 40\deg N in this century. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/45 |
| Date: | 09/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Manobianco, J., L.W. Uccelini, K.F. Brill, Y.H. Kuo |
| Title: | The impact of dynamic data assimilation on the numerical simulations of the QE II cyclone and an analysis of the jet streak influencing the precyclogenetic environment |
| Publication: | Mon. Wea. Rev., 120, 1973-1996 |
| Abstract: | The rapid intensificatin of a surface cyclone that battered the Queen Elizabeth II (QEII) ocean linear in the western Atlantic Ocean during September 1978 has been the focus |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/46 |
| Date: | 04/01/1991 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | McMillan, L.M. |
| Title: | Evaluation of a classification method for retrieving atmospheric temperatures from satellite measurements |
| Publication: | J. Appl. Met., 30, 432-446 |
| Abstract: | The retrieval of vertical temperature profiles from radiances measured from a satellite is a difficult inversion problem that has been solved to varying degree of accuracy by several approaches. A method that uses a classification approach for the initial estimate is described. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/47 |
| Date: | 10/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Miller, P.A., S.G. Benjamin |
| Title: | A system for the hourly assimilation of surface observations in mountainous and flat terrain |
| Publication: | Mon. Wea. Rev., 120, 2342-2359 |
| Abstract: | An assimilation system is presented that was designed to provide timely, detailed, and coherent analyses of surface data, even when the data are collected in rough terrain where station elevations differ widely and observations are |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/48 |
| Date: | 04/15/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Miller, R.N., M. Ghil, F. Gauthiez |
| Title: | Advanced data assimilation in strongly nonlinear dynamical systems |
| Publication: | J. Atmos. Sci., 51, 1037-1056 |
| Abstract: | Advanced data assimilation methods are applied to simple but highly nonlinear problems. The dynamical system studied here are the stochastically forced double well and the Lorenz model. In both systems, linear approximation of the dynamics about the ciritcal points near which regime transitions occur is not alwyas sufficient to track their |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/49 |
| Date: | 06/01/1990 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Mills, G.A., R.S. Seaman |
| Title: | The BMRC Regional Data Assimilation System |
| Publication: | Mon. Wea. Rev., 118, 1217-1237 |
| Abstract: | A new limited-area data assimilation system has been developed in the BMRC for oeprational use by the Austrailian Bureau of Meteorology. The system analyzes deviations from a primitive equations model forecast, using two-dimensional univariate statistical interpolation (SI) to analyze mass |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/50 |
| Date: | 08/01/1990 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Mitchell, H.L., C. Charette, C. Chouinard, B. Brasnett |
| Title: | Revised interpolation statistics for the Canadian data assimilation procedure: Their derivations and application |
| Publication: | Mon. Wea. Rev., 118, 1591-1614 |
| Abstract: | The first part of this paper presents the results of a study of the structure of the observed residuals, or differences, between radiosonde data and the short-range forecasts that are used as trial fields in an operational hemispheric data assimilation scheme. This study is based on fitting appropriate functional |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/51 |
| Date: | 07/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Navon, I.M., X. Zou, J. Derber, J. Sela |
| Title: | Variational data assimilation with an adiabatic version of the NMC spectral model |
| Publication: | Mon. Wea. Rev., 120, 1433-1446 |
| Abstract: | Variational four-dimensional (4D) data assimilation is performed using an adiabatic version of the National Meteorological Center (NMC) baroclinic spectral primitive equation model with operationally analyzed fields as well as simulation datasets |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/52 |
| Date: | 05/01/1990 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Pauley, P.M. X. Wu |
| Title: | The theoretical, discrete, and actual response of the Barnes objective adnalysis scheme for one- and two-dimensional fields |
| Publication: | Mon. Wea. Rev., 118, 1145-1163 |
| Abstract: | This paper examines the response of the Barnes objective analysis scheme as a function of wavenumber or wavelength and extends previous work in two primary areas. First, the first- and second-pass theoretical response |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/53 |
| Date: | 02/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Pauley, P.M., X. Wu |
| Title: | Reply to Achtemeier's comment on ``The theoretical, discrete, and actual response of the Barnes objective analysis scheme for one- and two-dimensional fields.' |
| Publication: | Mon. Wea. Rev., 122, 399-401 |
| Abstract: | NONE |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/54 |
| Date: | 06/15/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Pedder, M.A. |
| Title: | Limited area kinematic analysis by a multivariate statistical interpolation method |
| Publication: | Mon. Wea. Rev., 117, 1695-1708 |
| Abstract: | An observational map analysis scheme is described, whereby the vector field derived from discrete observations of wind and geopotential may be partitioned into its geostrophic, nondivergent and divergent parts without the need to solve Poisson-type equations relating streamfunction and velocity potential field to estimate divergence and vorticity data |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/55 |
| Date: | 10/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Puri, K., N.E. Davidson |
| Title: | The use of infrared satellite cloud imagery data as proxy data for moisture and diabatic heating in data assimilation |
| Publication: | Mon. Wea. Rev., 120, 2329-2341 |
| Abstract: | Geostationary and polar-orbiting satellites can provide useful proxy sources of moisture data and diabatic heating. It is shown that the use of this |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/56 |
| Date: | 01/01/1990 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Puri, K., J. Miller |
| Title: | The use of satellite data in the specification of convective heating for diabatic initialization and moisture adjustment in numerical weather prediction models |
| Publication: | Mon. Wea. Rev., 118, 67-93 |
| Abstract: | Although diabatic processes play an important role in the tropical circulation, current analysis schemes and numerical weather prediction models are unable to adequately include diabatic, heating information. In this paper, procedures |
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| Record ID: | 31/57 |
| Date: | 10/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Ramamurthy, M.K., I.M. Novon |
| Title: | The conugate-gradient variational analysis and initialization method: An application to MONEX SOP 2 data |
| Publication: | Mon. Wea. Rev., 120, 2360-2377 |
| Abstract: | A conugate-gradient variational blending technique, based on the method of direct minimization has been developed an applied to the problem of initialization in a limited-area model in the summer. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/58 |
| Date: | 11/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Ramamurthy, M.K., T.Y. Xu |
| Title: | Continuous data assimilation experiments with the NMC Eta Model: A GALE IOP 1 case study |
| Publication: | Mon. Wea. Rev., 121, 3082-3105 |
| Abstract: | The current major expansion in observational capability of the National Weather Service is principally in the volume of asynchronous data rather than synchronous observations at the standard synoptic times. Hence, the National Meteorological Center is considering a continuous data assimilation |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/59 |
| Date: | 09/01/1991 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Rogers, R.R., A.P. Schwartz |
| Title: | Mesoscale fluctuations of columnar water vapor |
| Publication: | J. Appl. Met., 30, 1305-1322 |
| Abstract: | During a 7-week period in the winter of 1986, a six-channel, ground-based microwave radimetere was operated at a site near Halifax, Nova Scotia, as part of the Canadian Atlantic Storms Program. One of the the quantities measured by this instrument was vertically integrated water |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/60 |
| Date: | 07/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Serrano, E., P. Unden |
| Title: | Evaluation of a tropical cyclone bogusing method in data assimilation and forecasting |
| Publication: | Mon. Wea. Rev., 122, 1523-1547 |
| Abstract: | A method for introducing bogus observations in the analysis of tropical cyclones has been tested for a period in 1991. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/61 |
| Date: | 04/01/1990 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Sienkiewicz, M.E. |
| Title: | Comments on ``A theory for the retrievals of virtucal temperature from remote measurements of horizontal winds and thermal raidation' |
| Publication: | Mon. Wea. Rev., 118, 988-989 |
| Abstract: | None |
| Location: | 0
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| Record ID: | 31/62 |
| Date: | 06/01/1990 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Stauffer, D.R., N.L. Seaman |
| Title: | Use of four-dimensional data assimilation in a limited-area mesoscle model. Part I: Experiments with synoptic-scale data |
| Publication: | Mon. Wea. Rev., 118, 1250-1277 |
| Abstract: | A four-dimensional data assimilation (FDDA) scheme based on Newtonian relaxation or ``nudging' is tested using standard rawinsonde data in the Penn State/NCAR limited-area mesoscale model |
| Location: | 0
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| Record ID: | 31/63 |
| Date: | 03/01/1991 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Stauffer, D.R., N.L. Seaman, F.S. Binkowski |
| Title: | Use of four-dimensional data assimilation in a limited-area mesoscale model. Part II: Effects of data assimilation within the planetary boundary layer |
| Publication: | Mon. Wea. Rev., 119, 734-754 |
| Abstract: | A four-dimensional data assimilation (FDDA) scheme based on Newtonian relaxation or nudging has been developed and evaluated in the Pennsylvania State/NCAR limited-area mesoscale model. It is shown in Part I of this study that continuous assimilation of standard-resolution |
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| Record ID: | 31/64 |
| Date: | 04/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Swinbank, R., A. O'Neill |
| Title: | A stratosphere--Troposphere data assimilation system |
| Publication: | Mon. Wea. Rev., 122, 686-702 |
| Abstract: | A data assimilation system has been developed at the UK Meteorological Office to analyze the mix of observations avaiable in the troposphere and stratosphere. The data assimilation system is based on the analysis correction scheme used at the UK Meteorological Office for operational weather forecasting |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/65 |
| Date: | 12/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Thepaut, J.N., R.N. Hoffman, P. Courtier |
| Title: | Interactions of dynamics and observations in a four-dimensional variational assimilation |
| Publication: | Mon. Wea. Rev., 121, 3393-3414 |
| Abstract: | A four-dimensional ($D) variational assimilation (FDVAR) seeks an optimal balance between observations scattered in time and space over a finiite 4D analysis volume and a priori information. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/66 |
| Date: | 07/01/1990 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Turpeinen, O.M., L. Garand, R. Benoit, M. Roch |
| Title: | Diabatic initialization of the Canadian Regional Finite-Element (RFE) model using satellite data. Part I: Methodology and application to a winter storm |
| Publication: | Mon. Wea. Rev., 118, 1381-1395 |
| Abstract: | The usefulness of numerical weather prediction models in very short-range forecasting is limited by the spinup problem, resulting in an understanding |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/67 |
| Date: | 07/01/1990 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Turpeinen, O.M. |
| Title: | Diabatic initialization of the Canadian Regional Finite-element (RFE) Model using satellite data. Part II: Sensitivity to humidity enhancement, latent-heating profile and rain rates |
| Publication: | Mon. Wea. Rev., 118, 1396-1407 |
| Abstract: | A frontal development observed during the CASP (Canadian Atlantic Storm Project) project is used to investigate the dependence of the spinup time of the divergent circulation |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/68 |
| Date: | 11/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Unden, P. |
| Title: | Tropical data assimilation and analysis of divergence |
| Publication: | Mon. Wea. Rev., 117, 2495-2517 |
| Abstract: | An important limitation of the ECMWF wind analyses has been the use of a nondivergent constaint on the analysis increments. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/69 |
| Date: | 08/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Zupanski, M. |
| Title: | Regional four-dimensional variational data assimilation in a quasi-operational forecasting environment |
| Publication: | Mon. Wea. Rev., 121, 2396-2408 |
| Abstract: | Four-dimensional variational data assimilation is applied to a regional forecast model as part of the development of a new data assimilation system at the National Meteorological Center (NMC). |
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| Record ID: | 31/70 |
| Date: | 05/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Zhu, K., I.M. Navon, X. Zou |
| Title: | Variational data assimilation with a variable resolution finite-element shallow-water equations model |
| Publication: | Mon. Wea. Rev., 122, 946-965 |
| Abstract: | The adjoint model of a finite element shallow-water equations model was obtained with a view to calculate the gradient of a cost functional in the frameowrk of using this model to carry out variational data assimilation (VDA) experiments using optimal control of partial differential equations |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/71 |
| Date: | 09/01/1995 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Krishnamurti, T.N., S.K.R. Bhowmik, D. Osterhoff, G. Hohaly, N. Surgi |
| Title: | Mesoscale signatures within the tropics generated by physical initialization |
| Publication: | Mon. Wea. Rev., 123, 2771-2790 |
| Abstract: | This paper presents some recent results on physical initialization from the use of a very high resolution global model. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/72 |
| Date: | 09/01/1995 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Zou, J., W.W. Hsieh, I.M. Navon |
| Title: | Sequential open-boundary control by data assimilation in a limited-area model |
| Publication: | Mon. Wea. Rev., 123, 2899-2909 |
| Abstract: | The feasibility of sequential open-boundary control by data assimilation is a regional ocean model has been investigated using a barotropic wind-driven ocean circulation model. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/73 |
| Date: | 2/2/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Sun, J., C. Pires, G. Plaut |
| Title: | Comparison of thermodynamic retrieval by the adjoint method with the traditional retrieval method |
| Publication: | Mon. Wea. Rev., 124, 308-324 |
| Abstract: | The adjoint technique for retieval of the thermodynamic fields is compared with the traditional technique of Gal-Chen and Hane. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/74 |
| Date: | 4/1/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Langland, R.H., R.M. Errico |
| Title: | Comments on 'Use of an adjoint model for finding triggers for alpine lee cyclogenesis.' |
| Publication: | Mon. Wea. Rev. 124, 4, 757-760 |
| Abstract: | No abstract. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/75 |
| Date: | 4/1/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Vukicevic, T., K Raeder |
| Title: | Reply to Comments on 'Use of an adjoint model for finding triggers for alpine lee cyclogenesis.' |
| Publication: | Mon. Wea. Rev., 124, 4, 761-763 |
| Abstract: | No abstract. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/76 |
| Date: | 07/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Benjamin, S.G. |
| Title: | An isentropic mesoa-scale analysis system and its sensitivity to aircraft and surface observations. |
| Publication: | Mon. Wea. Rev., 117, 1586-1603 |
| Abstract: | An objective analysis scheme for meterological variables on constant potential temperature surfaces is presented. The analysis uses a form of multivariate statistical interpolation and is designed to retain mesoscale detail in disparate observations including rawinsonde, surface, aircraft, satellite, and wind profiler data while combining them with a forecast background (first guess) field. |
| Location: | 1
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| Record ID: | 31/77 |
| Date: | 03/01/1985 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Kuo, Y-H, R.A. Anthes |
| Title: | Calculation of geopotential and termperature fields from an array of nearly continuous wind observations. |
| Publication: | J. Atmos. and Ocean. Tech, 2, 22-34 |
| Abstract: | Observing systems simulation experiments were carried out to estimate the acuracy of temperatures diagnosed from the divergence equation when an array of nearly continuous (in time) wind observations is available. It was found that a useful estimate of temperature can be derived from high-resolution wind observations such as those obtained from a network of wind profiling systems. |
| Location: | 1
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| Record ID: | 31/78 |
| Date: | 07/01/1985 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Benjamin, S.G., N.L. Seaman |
| Title: | A simple scheme for objective analysis in curved flow. |
| Publication: | Mon. Wea. Rev., 113, 1184-1198 |
| Abstract: | An objective analysis scheme has been developed which combines use of three different weighting functions, two of which are anisotropic (elliptical and banana-shaped). |
| Location: | 1
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| Record ID: | 31/79 |
| Date: | 01/01/1995 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Tanguay, M., P. Bartello, P. Gauthier |
| Title: | Four-dimensional data assimilation with a wide range of scales. |
| Publication: | Tellus, 47A, 5, 2, 974-997 |
| Abstract: | A number of experiments investigating four-dimensional variational data assimilation using the adjoint method are presented. It has been proposed that the method will be able to produce improved initial conditions in data-sparse regions. |
| Location: | 1
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| Record ID: | 31/80 |
| Date: | 5/1/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Yang, W. I.M. Navon, P. Courtier |
| Title: | A new Hessian preconditioning method applied to variational data assimilation experiments using NASA general circulation models. |
| Publication: | Mon. Wea. Rev., 124, 5, 1000-1017 |
| Abstract: | An analysis is provided to show that Courtier's et al. method for estimating the Hessian Preconditioning is not applicable to important categories of cases involving nonlinearity. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/81 |
| Date: | 5/1/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Ruggiero, F.H., K.D. Sashegyi, R.V. Madala, S. Raman |
| Title: | The use of surface observations in four dimensional data assimilation using a mesoscale model. |
| Publication: | Mon. Wea. Rev., 124, 5, 1018-1033 |
| Abstract: | A system for the frequent intermittent assimilation of surface observations into a mesoscale model is described. The assimilation begins by transforming the surface observations to model coordinates. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/82 |
| Date: | 4/15/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Xu, Q. |
| Title: | Generalized adjoint for physical processes with parameterized discontinuities. Part I: Basic issues and heuristic examples. |
| Publication: | J. Atmos. Sci., 53, 8, 1123-1142 |
| Abstract: | Symbolic operations are used together with delta functions to derive the generalized adjoint method for physical processes that contain first order discontinuities caused by parameterized on/off switches with zero-order discontinuities in the source term. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/83 |
| Date: | 4/15/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Xu, Q. |
| Title: | Generalized adjoint for physical processes with parameterized discontinuities. Part II: Vector formulations and matching conditions. |
| Publication: | J. Atmos. Sci., 53, 8, 1143-1155 |
| Abstract: | Generalized tangent linear and adjoint equations are derived for a vector equation that contains a parameterized source term with discontinuous on/off switches controlled by a threshold condition. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/84 |
| Date: | 01/01/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Menard, R. |
| Title: | The application of Kalman smoother theory to the estimation of 4DVAR error statistics. |
| Publication: | Tellus, 48A, 221-237 |
| Abstract: | Modern atmospheric data assimilation theory is dominated by the four-dimensional variational (4DVAR) and Kalman filter/smoother approaches. Both generate analysis weights (explicitly or implicitly) which are dynamically determined by the assimilation model. |
| Location: | 1
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| Record ID: | 31/85 |
| Date: | 04/01/1991 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Benjamin, S.G., K.A. Brewster, R. Brummer, B.F. Jewett, T.W. Schlatter, T.L. Smith, P.A. Stamus |
| Title: | An isentropic three-hourly data assimilation system using ACARS aircraft observations. |
| Publication: | Mon. Wea. Rev., 119, 4, 888-906 |
| Abstract: | A 3-h intermittent data assimilation system (Mesoscale Analysis and Prediction System -- MAPS) configured in isentropic coordinates was developed and implemented in real-time operation. |
| Location: | 1
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| Record ID: | 31/86 |
| Date: | 06/01/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Takacs, L.L., A.M. da Silva, D. Ledvina |
| Title: | Data assimilation using incremental analysis updates |
| Publication: | Mon. Wea. Rev., 124, 1256-1271 |
| Abstract: | The IAU (incremental analysis updating) process incorporates analysis increments into a model integration in a gradual manner. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/87 |
| Date: | 01/01/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Pires, C., R. Vautard, O. Talagrand |
| Title: | On extending the limits of variational assimilation in nonlinear chaotic systems. |
| Publication: | Tellus, 48A, 96-121 |
| Abstract: | A study is made of the limits imposed on variational assimilation of observations by the chaotic character of the atmospheric flow. |
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| Record ID: | 31/88 |
| Date: | 01/01/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Phalippou, L. |
| Title: | Variational retrieval of humidity profile, wind speed and cloud liquid-water path with the SSM/I: Potential for numerical weather prediction. |
| Publication: | Q.J.R. Met. Soc., 122, B, 530, 327-355 |
| Abstract: | Several regression algorithms have been proposed to retrieve geophysical parameters from the Special Sensor Microwave Imager (SSM/I) radiances. |
| Location: | 1
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| Record ID: | 31/89 |
| Date: | 01/01/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Jarvinen, H., J-N Thepaut, P. Courtier |
| Title: | Quasi-continuous variational data assimilation. |
| Publication: | Q.J.R. Met. Soc., 122, 515-534 |
| Abstract: | Abstract: 'All the computations associated with the operational meteorological data assimilation are usually carried out after the so called cut-off time, i.e. a few hours after the end of the assimilation period. |
| Location: | 1
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| Record ID: | 31/90 |
| Date: | 01/01/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Thepaut, J-N., P. Courtier, G. Belaud, G. Lemaitre |
| Title: | Dynamical structure functions in a four-dimensional variational assimilation: A case study. |
| Publication: | Q.J.R. Met. Soc., 122, 535-561 |
| Abstract: | This paper contributes to the understanding of the structure functions used implicitly in the four-dimensional variational assimilation (4D-Var) developed at the European Centre for Medium-Range Weather Forecasts in the last few years. |
| Location: | 1
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| Record ID: | 31/91 |
| Date: | 9/15/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Yang, S., Q. Xu |
| Title: | Statistical errors in variational data assimilation -- A theoretical one-dimensional analysis applied to doppler wind retrieval. |
| Publication: | J. Atmos. Sci., 53, 18, 2563-2577 |
| Abstract: | When the velocity field is retrieved by a variational data assimiliation method from the tracer (reflectivity) pattern movement observed by a Doppler radar, the accuracy of the retrieved velocity is affected by the observational error and data resolution. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/92 |
| Date: | 9/15/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Zhang, J., T. Gal-Chen |
| Title: | Single-Doppler wind retrieval in the moving frame of reference. |
| Publication: | J. Atmos. Sci., 53, 18, 2609-2623 |
| Abstract: | A single Doppler radar analysis scheme is developed, and three-dimensional wind fields are retrieved from single Doppler radar reflectivity and radial velocity fields. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/93 |
| Date: | 11/01/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Tsuyuki, T. |
| Title: | Variational data ssimilation in the tropics using precipitation data. Part II: 3D model |
| Publication: | Mon. Wea. Rev., 124, 2545-2561 |
| Abstract: | A primitive equation model is used to examine the performance of four-dimensional variational data assimilation (4D-VAR) with moist processes and to assess the impact of assimilating precipitation data in the Tropics |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/94 |
| Date: | 11/01/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Zupanski, M. |
| Title: | A preconditioning algorithm for four-dimensional variational data assimilation |
| Publication: | Mon. Wea. Rev., 124, 2562-2573 |
| Abstract: | A preconditioning method suitable for use in four-dimensional variational (4DVAR) data assimilatin is proposed |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/95 |
| Date: | 12/1/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Zou, X., Y.-H. Kuo |
| Title: | Rainfall assimilation through an optimal control of initial and boundary conditions in a limited-area mesoscale model. |
| Publication: | Mon. Wea. Rev., 124, 12, 2859-2882 |
| Abstract: | To assess the impact of rainfall observations on short-range forecasts of precipitation, and to improve our understanding of the physical processes responsible for the development of a mesoscale convective system associated with the dryline that occurred on 10 April 1979 in the midwestern United States, a series of four-dimensional variational data assimimation experiments was conducted based on the special dataset collected in the Severe Environmental Storm and Mesoscale Experiment. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/96 |
| Date: | 12/1/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | van Leeuwen, P.J., G. Evensen |
| Title: | Data assimilation and inverse methods in terms of a probabilistic formation. |
| Publication: | Mon. Wea. Rev., 124, 12, 2898-2913 |
| Abstract: | The weak constaint inverse for nonlinear dynamical models is discussed and derived in terms of a probabilistic formulation. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/97 |
| Date: | 1/1/1997 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Blanchet, I., C. Frankignoul, M.A. Cane |
| Title: | A comparison of adaptive Kalman filters for a tropical Pacific Ocean model. |
| Publication: | Mon. Wea. Rev., 125, 1, 40-58 |
| Abstract: | The Kalman filter is the optimal linear assimilation scheme only if the first- and second-order statistics of the observational and system noise are correctly specified. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/98 |
| Date: | 08/19/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Barker, D.M., A.C. Lorenc, P.L.F. Andrews, N.B. Ingleby, A. Clayton, M. Thurlow |
| Title: | Progress report on the development of a variational data assimilation scheme at the UKMO |
| Publication: | 11th Conf. on Numerical Weather Prediction, Aug. 19-23, 1996, Norfolk, VA, AMS. |
| Abstract: | NONE |
| Location: | 2
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| Record ID: | 31/99 |
| Date: | 6/1/1997 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Evensen, G. |
| Title: | Advanced data assimilation for strongly nonlinear dynamics. |
| Publication: | Mon. Wea. Rev., 125, 1342-1354 |
| Abstract: | Advanced data assimilation methods become extremely complicated and challenging when used with strongly nonlinear models. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/100 |
| Date: | 6/1/1997 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Bao, J.-W., R.M. Errico |
| Title: | An adjoint examination of a nudging method for data assimilation. |
| Publication: | Mon. Wea. Rev., 125, 1355-1373 |
| Abstract: | A regional adjoint modeling system is modified to determine the sensitivities of data assimilation and forecast results with respect to perturbations of the nudging fields and coefficients. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/101 |
| Date: | 7/1/1997 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Tsuyuki, T. |
| Title: | Variational data assimilation in the tropics using precipitation data. Part III: Assimilation of SSM/I precipitation rates. |
| Publication: | Mon. Wea. Rev., 125, 1447-1464 |
| Abstract: | The performance of 4D-VAR in the Tropics is examined by assimilating radiosonde and pibal data over the globe and SSM/I precipitation rates over the tropical oceans for the period 0000-1200 UTC 22 August 1992. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/102 |
| Date: | 7/1/1997 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Lyster, P.M., S.E. Cohn, R. Menard, L.-P. Chang, S.-J. Lin, R.G. Olsen |
| Title: | Parallel implementation of a Kalman filter for constituent data assimiliation. |
| Publication: | Mon. Wea. Rev., 125, 1674-1686 |
| Abstract: | A Kalman filter for the assimilation of long-lived atmospheric chemical constituents was developed for two-dimensional transport models on isentropic surfaces over the globe. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/103 |
| Date: | 6/15/1997 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Sun, J., N.A. Crook |
| Title: | Dynamical and microphysical retrieval from Doppler radar observations using a cloud model and its adjoint. Part I: Model development and simulated data experiments. |
| Publication: | J. Atmos. Sci., 54, 1642-1661 |
| Abstract: | The purpose of the research reported in this paper is to develop a variational data analysis system that can be used to assimilate data from one or more Doppler radars. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/104 |
| Date: | 10/1/1997 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Wang, Z., K.K. Droegemeyer, L. White, I.M. Navon |
| Title: | Application of a new adjoint Newton algorithm to the 3D ARP strorm-scale model using simulated data. |
| Publication: | Mon. Wea. Rev., 125, 10, 2460-2478 |
| Abstract: | The adjoint Newton algorithm (ANA) is based on the first- and second-order adjoint techniques allowing one to obtain the |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/105 |
| Date: | 11/1/1997 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Fillion, L., R. Errico |
| Title: | Variational assimilation of precipitation data using moist convective parameterization schemes: A 1D-Var study. |
| Publication: | Mon. Wea. Rev., 125, 2917-2942 |
| Abstract: | Some basic aspects related to the problem of incorporating moist convective processes in a variational data assimilation framework are considered. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/106 |
| Date: | 11/1/1997 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Bouteloup, Y. |
| Title: | Forecast of operational forecast skill and the adjoint of a primitive model equation. |
| Publication: | Mon. Wea. Rev., 125, 2984-2997 |
| Abstract: | In this article the author demonstrates the feasibility of a local skill forecast system based on the use of the adjoint of the tangent linear equations. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/107 |
| Date: | 12/1/1997 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Xu, Q. |
| Title: | Generalized adjoint for physical processes with parameterized discontinuities. Part III: Multiple threshold conditions. |
| Publication: | J. Atmos. Sci., 54, 2713-2721 |
| Abstract: | The generalized adjoint is extended to special situations in which the concerned switches are triggered simultaneously by more than one threshold condition. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/108 |
| Date: | 12/1/1997 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Xu, Q. |
| Title: | Generalized adjoint for physical processes with parameterized discontinuities. Part IV: Problems in time descretization. |
| Publication: | J. Atmos. Sci., 54, 2722-2728 |
| Abstract: | It is shown analytically and graphically that when parameterized on/off switches are triggered at discrete time levels by a threshold condition in a numerical model, the model solution is not continuously dependent on the initial state. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/109 |
| Date: | 12/01/1997 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Park, S.K., K.K. Droegemeier |
| Title: | Validity of the tangent linear approximation in a moist convective cloud model. |
| Publication: | Mon. Wea. Rev., 125, 3320-3340 |
| Abstract: | The validity of the moist tangent linear model derived from a time-dependent 1D Eulerian cloud model is investigated by comparing TLM solutions to differences between results from a nonlinear model |
| Location: | 1
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| Record ID: | 31/110 |
| Date: | 08/19/1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Park, S.K., K.K. Droegemeier |
| Title: | Sensitivity of 3-D convective storm evolution to water vapor and implications for variational data assimilation |
| Publication: | Preprints, 11th Conf. on Numerical Weather Prediction, August 19-23, 1996, Norfolk, VA |
| Abstract: | None |
| Location: | 1
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| Record ID: | 31/111 |
| Date: | 10/07/1997 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Park, S.K., K.K. Drogemeier |
| Title: | 4DVAR with a moist adjoint applied to deep convective storms -- Simulated data experiments |
| Publication: | Proc., 2nd US-Korea Workshop for Storm- and Mesoscale Weather Analysis and Prediction, 7-10 October 1997, Seoul, Korea |
| Abstract: | None |
| Location: | 2
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| Record ID: | 31/112 |
| Date: | 01/01/1997 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Schraff, C.H. |
| Title: | Mesoscale data assimilation and prediction of low stratus in the Alpine region |
| Publication: | Meteorol. Atmos. Phys., 64, 21-50 |
| Abstract: | A number of problems related to mesoscale numerical prediction of low stratus in the Alpin region are formulated, and addressed in a series of experiments for two wintertime cases. |
| Location: | 1
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| Record ID: | 31/113 |
| Date: | 3/1/1998 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Sun, J., N.A. Cook |
| Title: | Dynamical and microphysical retrieval from Doppler radar observations using a cloud model and its adjoint. Part II: Retreival experiments of an observed Florida convective storm. |
| Publication: | J. Atmos. Sci., 55, 835-862 |
| Abstract: | The variational Doppler radar analysis system developed in part I of this study is tested on a Florida airmass storm observed during the Convection and Precipitation/Electrification Experiment. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/114 |
| Date: | 03/01/1998 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] (74) Land Surface - Soil/Vegetation/Snow |
| Author: | Jones, A.S., I.C. Guch, T.H. Vonder Haar |
| Title: | Data assimilation of satellite-derived heating rates as proxy surface wetness data into a regional atmospheric mesoscale model. Part I: Methodology. |
| Publication: | Mon. Wea. Rev., 126, 634-645 |
| Abstract: | A satellite data assimilation method is developed which incorporates satellite-observed infrared heating rates into a mesoscale atmospheric model to retrieve model soil moisture. |
| Location: | 1
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| Record ID: | 31/115 |
| Date: | 03/01/1998 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] (74) Land Surface - Soil/Vegetation/Snow |
| Author: | Jones, A.J., I.C. Guch, T.H. Vonder Haar |
| Title: | Data assimilation of satellite-derived heating rates as proxy surface wetness data into a regional atmospheric mesoscale model. Part II: A case study. |
| Publication: | Mon. Wea. Rev., 126, 646-667 |
| Abstract: | A satellite data assimilation method is applied which incorporates satellite-observed heating infrared rates into a mesoscale atmospheric model to retrieve model soil moisture. |
| Location: | 1
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| Record ID: | 31/116 |
| Date: | 3/1/1998 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Houtekamer, P.L., H.L. Mitchell |
| Title: | Data assimilation using an ensemble Kalman filter technique. |
| Publication: | Mon. Wea. Rev., 126, 796-811 |
| Abstract: | The possibility of performing data assimilation using the flow-dependent statistics calculated from an ensemble of short-range forecasts is examined in an idealized environment. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/117 |
| Date: | 12/1/1997 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Yu, T.-W., M. Iredell, D. Keyser |
| Title: | Global data assimilation and forecast experiments using SSM/I wind speed data derived from a neural network algorithm |
| Publication: | Wea. and Forecasting, 12, 859-865 |
| Abstract: | A neural network algorithm used in this study to derive Special Sensor Microwave Imager wind speeds from the Defense Met. Satellite Program satellite-observed brightness temperatures is briefly reviewed. |
| Location: | 2
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| Record ID: | 31/118 |
| Date: | 8/1/1998 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Todling, R., S.E. Cohn, N.S. Sivakumaran |
| Title: | Suboptimal schemes for retrospective data assimilation based on the fixed-lag Kalman smoother. |
| Publication: | Mon. Wea. Rev., 126, 2274-2286 |
| Abstract: | The fixed-lag Kalman smoother was proposed recently by S.E. Cohn et al. as a framework for providing retrospective data assimilation capability in atmospheric reanalysis projects. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/119 |
| Date: | 09/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Derber, J., A. Rosati |
| Title: | A global oceanic data assimilation system |
| Publication: | J. Phys. Ocean., 19, 1333-1347 |
| Abstract: | A global oceanic four-dimensional data assimilation system has been developed for use in initializing coupled ocean-atmosphere general circulation models and many other applications. |
| Location: | 1
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| Record ID: | 31/120 |
| Date: | 01/01/1998 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Swanson, K., R. Vautrad, C. Pires |
| Title: | Four-dimensional variational assimilation and predictability in a quasi-geostrophic model |
| Publication: | Tellus, 50A, 369-390 |
| Abstract: | Four-dimensional variational assimilaiton (4DVAR) of noisy observations in a multi-layer quasi-geostrophic model is studied, in both the perfect and imperfect model settings. |
| Location: | 1
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| Record ID: | 31/121 |
| Date: | 01/01/99 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Janiskova M., J-N. Thepaut, J-F. Geleyn |
| Title: | Simplified and regular physical parameterizations for incremental four-dimensional variation assimilation |
| Publication: | Mon. Wea. Rev., 127, 26-45 |
| Abstract: | A set of physical parameterizations has been developed for inclusion in incremental four-dimesional varaiation assimilation (4D-Var.). The goal for this physical package is that it be simple, regular (for the efficiency of the minimization in 4D-Var.), and at the same time realistic enough. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/122 |
| Date: | 04/01/1999 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Tanguay, M., S. Polavarapu |
| Title: | The adjoint of the semi-lagrangian treatment of the passive tracer equation |
| Publication: | Mon. Wea. Rev., 127, pp. 551-564 |
| Abstract: | The semi-lagrangian treatment of the ID passive tracer equation using prescribed piecewise-continuous inter-polating functions is considered. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/123 |
| Date: | 05/01/1999 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Huang, X.-Y. |
| Title: | A generalization of using an adjoint model in intermittent data assimilation systems |
| Publication: | Mon. Wea. Rev., 127, pp. 766-787 |
| Abstract: | A generalized setup is proposed for the poor man's 4D variational data assimilation system (PMV) of Huang et al. The new scheme is referred to as a generalization of PMV (GPV) and has the same basic idea as that of PMV, that is, to use an adjoint model to improve an optimum interpolation (OI)-based assimilation system. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/124 |
| Date: | 06/01/1999 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | van Leeuwen, P.J. |
| Title: | Comment on |
| Publication: | Mon. Wea. Rev., 127, pp. 1374-1377 |
| Abstract: | None Given. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/125 |
| Date: | 01/01/1999 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Errico, R.M., K.D. Raeder |
| Title: | An examination of the accuracy of the linearization of a mesoscale model with moist physics |
| Publication: | Q.J.R. Meteorol. Soc., 125, 169-195 |
| Abstract: | The accuracy of tangent and adjoint versions of a primitive-equation model with moist physics is examined with respect to growing perturbations having significant initial magnitudes. |
| Location: | 0
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| Record ID: | 31/126 |
| Date: | 07/01/1999 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Lermusiaux, P.F.J., A.R. Robinson |
| Title: | Data assimilation via error subspace statistical estimation. Part I: Theory and Schemes |
| Publication: | Mon. Wea. Rev., 127, pp. 1385-1407 |
| Abstract: | A rational approach is used to identify efficient schemes for data assimilation in nonlinear ocean-atmosphere models. The conditional mean, a minimum of several cost functionals, is chosen for an optimal estimate. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/127 |
| Date: | 07/01/1999 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Lermusiaux, P.F.J. |
| Title: | Data assimilation via error subspace statistical estimation. Part II: Middle Atlantic bright shelfbreak front |
| Publication: | Mon. Wea. Rev., 127, pp. 1408-1432 |
| Abstract: | Identical twin experiments are utilized to assess and exemplify the capabilities of error subspace statistical estimation (ESSE). |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/128 |
| Date: | 07/01/1999 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Alexander, G.D., J.A. Weinman, V.M. Karyampudi, W.S. Olson, A.C.L. Lee |
| Title: | The effect of assimilating rain rates derived from satellites and lightning on forecasts of 1993 superstorm |
| Publication: | Mon. Wea. Rev., 127, pp. 1433-1457 |
| Abstract: | Inadequate specification of divergence and moisture in the initial conditions of numerical models results in the well-documented |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/129 |
| Date: | 07/01/1999 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Deblonde, G. |
| Title: | Variational assimilation of SSM/I total precipitable water retrievals in the CMC analysis system |
| Publication: | Mon. Wea. Rev., 127, pp. 1458-1476 |
| Abstract: | The impact of assimilating Special Sensor Microwave/Imager (SSM/I) total precipitable water (TPW) on teh Canadian Meteorlogical Centre (CMC) operational analyses and forecasts is evaluated. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/130 |
| Date: | 03/01/1999 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Errico, R.M. |
| Title: | Workshop on assimilation of satellite data |
| Publication: | Bull. Amer. Met. Soc., 80, 463-471 |
| Abstract: | A workshop to discuss the incorporation of satellite data within data assimulation systems was held at the National Aeronautics and Space Agency during 21-23 April 1998. |
| Location: | 1
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| Record ID: | 31/131 |
| Date: | 02/01/1999 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Mahfouf, J.F. |
| Title: | Influence of physical processes on the tangent-linear approximation |
| Publication: | Tellus, 51A, 147-166 |
| Abstract: | A comprehensive set of linear physical parameterizations is developed for the tangent-linear and adjoint versions of ECMWF global forecast model. |
| Location: | 1
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| Record ID: | 31/132 |
| Date: | 01/01/1999 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Miller, R.N., E.F. Carter, S.T. Blue |
| Title: | Data assimilation into nonlinear stochastic models |
| Publication: | Tellus, 51A, 167-194 |
| Abstract: | With very few exceptions, data assimilation methods which have been used or proposed for use with ocean models have been based on some assumptions of linearity of near-linearity. |
| Location: | 1
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| Record ID: | 31/133 |
| Date: | 12/1/1988 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] (51) Numerical Weather Prediction |
| Author: | Wang, W., T.T. Warner |
| Title: | Use of four-dimensional data assimilation by Newtonian relaxation and latent-heat forcing to improve a mesoscale model precipitation forecast: A case study. |
| Publication: | Mon. Wea. Rev., 116, 2593-2613 |
| Abstract: | The Penn State/NCAR mesoscale model has been used in a study of special static-and dynamic-initialization techniques that improve a very-short-range forecast of the heavy convective rainfall that occurred in Texas, Oklahoma, and Kansas during 9-10 May 1979. |
| Location: | 0
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| Record ID: | 31/134 |
| Date: | 08/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Daley, R. |
| Title: | Estimating model-error covariances for applicaiton to atmospheric data assimilation |
| Publication: | Mon. Wea. Rev., 120, 1735-1746 |
| Abstract: | Forecast-error statistics have traditionally been used to investigate model performance and to calculate analysis weights for atmospheric data assimilation. |
| Location: | 0
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| Record ID: | 31/135 |
| Date: | 06/24/1985 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Durand, Y. |
| Title: | The use of satellite data in French high resolution analysis |
| Publication: | Proc., Workshop on High Resolution Analysis, 24-26 June 1985, European Centra for Medium Range Weather Forecasts. |
| Abstract: | A mesoscale analysis has been developed in the French Weather Service to provide the initial conditions for a short-range weather prediction model over France (mesh size = 35 km). |
| Location: | 0
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| Record ID: | 31/136 |
| Date: | 01/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Ehrendorfer, M. |
| Title: | Four-dimensional data assimilation: comparison of variational and sequential algorithms |
| Publication: | Q.J.R. Meteorol. Soc., 118, 673-713 |
| Abstract: | The problem of data assimilation that is concerned with the complete and accurate specification of the atmosperic stat based upon observations and other types of information can be approached either by variational or sequential algorithms. |
| Location: | 0
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| Record ID: | 31/137 |
| Date: | 01/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Eyre, J.R., A.C. Lorenc |
| Title: | Direct use of satellite sounding radiances in numerical weather prediction |
| Publication: | Meteorol. Mag., 118, 13-16 |
| Abstract: | Recent research on satellite sounding data and numerical analysis techniques has explored new ways of using the satellite data within numerical weather prediction (NWP) systems. |
| Location: | 0
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| Record ID: | 31/138 |
| Date: | 01/01/1990 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Gustafsson, N. |
| Title: | Sensitivity of limited area model data assimilation to lateral boundary condition fields |
| Publication: | Tellus, 42A, 109-115 |
| Abstract: | Experiments with a limited area model forecasting system have been carried out to show the importance of accurate lateral boundary conditions, also during data assimilation forecast cycles. |
| Location: | 0
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| Record ID: | 31/139 |
| Date: | 06/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Jiang, H.M., C.H. Shiao |
| Title: | Numerical experiments of data assimilation using the shallow-water equation model |
| Publication: | Meteor. Res., 12, 33-57 |
| Abstract: | We have used a shallow-water equation model to study the feasibility of data assimilation. |
| Location: | 0
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| Record ID: | 31/140 |
| Date: | 09/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Kuo, Y.H., Y.R. Guo |
| Title: | Dynamic initializaiton using observations from a hypothetical network of profilers |
| Publication: | Mon. Wea. Rev., 117, 1975-1998 |
| Abstract: | This paper presents results from a series of observing system simulation experiments (OSSEs), designed to test a dynamic initialization procedure for continuous assimilation of observations from a hypothetical network of profilers. |
| Location: | 0
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| Record ID: | 31/141 |
| Date: | 06/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Long, R.B., W.C. Thacker |
| Title: | Data assimilation into a numerical equatorial ocean model. I. The model and the assimilation algorithm |
| Publication: | Dyn. Atmos. Oceans, 13, 379-412 |
| Abstract: | Numerical modeling provides a powerful tool for the study of the dynamics of oceans and atmospheres. |
| Location: | 0
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| Record ID: | 31/142 |
| Date: | 06/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Long, R.B., W.C. Thacker |
| Title: | Data assimilation into a numerical equatorial ocean model. II: Assimilation experiments |
| Publication: | Dyn. Atmos. Oceans, 13, 413-439 |
| Abstract: | A sequence of numerical experiments is conducted using a linear, semi-spectral equatorial ocean model and an advanced data assimilation scheme. |
| Location: | 0
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| Record ID: | 31/143 |
| Date: | 05/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Luthi, D., C. Schar, H.C. Davies |
| Title: | On the atmospheric response to steady mesoscale low-level diabatic heating |
| Publication: | Contrib. Atmos. Phys., 62, 126-150 |
| Abstract: | A study in undertaken of the flow response to prescribed low-level mesoscale distributions of steady diabatic heating. |
| Location: | 0
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| Record ID: | 31/144 |
| Date: | 06/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Malanotte-Rizzoli, P., R.E. Young, D.B. Haidvogel |
| Title: | Initialization and data assimilation experiments with a primitive equation model |
| Publication: | Dyn. Atmos. Oceans, 13, 349-378 |
| Abstract: | The process of combining models of the ocean circulation with large data sets is known in meteorology as model initialization and data assimilation. |
| Location: | 0
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| Record ID: | 31/145 |
| Date: | 01/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Marchuk, G.I., Y.N. Skiba |
| Title: | Role of adjoint equations in estimating monthly mean air surface tmeperature anomalies |
| Publication: | Atmosfera, 5, 119-133 |
| Abstract: | Using the solution of a specially formulated adjoint problem an integral formula is derived for the study of linear model response. |
| Location: | 0
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| Record ID: | 31/146 |
| Date: | 01/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Rabier, F., P. Courtier |
| Title: | Four-dimensional assiilation in the presence of baroclinic instability |
| Publication: | Q.J.R. Meteorol. Soc., 118, 649-672 |
| Abstract: | Current operational assimilation methods have revealed deficiencies in cases of strong baroclini development. |
| Location: | 0
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| Record ID: | 31/147 |
| Date: | 01/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Saunders, R.W. |
| Title: | A comparison of satellite-retrieved parameters with mesoscale model analyses |
| Publication: | Q.J.R. Meteorol. Soc., 115, 651-672 |
| Abstract: | A scheme to retrieve quantitative production from radiances recorded by the AVHRR (Advanced Very High Resolution Radiometer) on NOAA satellites over the same area as the Meteorological Office mesoscal model is outlined. |
| Location: | 0
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| Record ID: | 31/148 |
| Date: | 08/01/1987 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Stauffer, D.R., N.L. Seaman |
| Title: | A real-data numerical study and four-dimensional data assimilation application for mesobeta-scale flow in complex terrain |
| Publication: | Proc. Int. Symposium on Mesoscale analysis & forecasting, 17-19 Aug. 1987, Vancouver, BC, Canada, IAMAP, WMO, ESA, 533-538 |
| Abstract: | A mesoscale three-dimensional numerical model, using realistic terrain and initialized with real data, is used to investigate various mechanisms for observed vallye flow in two cases for a specific mountain-valley system. |
| Location: | 0
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| Record ID: | 31/149 |
| Date: | 01/01/1991 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Thepaut, J.N., P. Courtier |
| Title: | Four-dimensional variational data assimilation using the adjoint of a multilevel primitive-equation model |
| Publication: | Q.J.R. Meteorol. Soc., 117, 1225-1254 |
| Abstract: | The aim of the paper is to demonstrate the numerical feasibility of 4-D variational assimilation using a multilevel primitive-equation model. |
| Location: | 0
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| Record ID: | 31/150 |
| Date: | 07/23/1990 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Verlinde, J., W.R. Cotton |
| Title: | A critical look at kinematic microphysical retrieval algorithms |
| Publication: | Conf. on Cloud Physics, July 23-27, 1990, San Francisco, CA, AMS. |
| Abstract: | None |
| Location: | 0
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| Record ID: | 31/151 |
| Date: | 11/01/1988 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Lipton, A. |
| Title: | Mesoscale anlaysis by numerical modeling coupled with satellite-based sounding |
| Publication: | NOAA Grant NO. NA-85-RAH-05045, CIRA Report, 189 pp. |
| Abstract: | This dissertation deals with the development of a system for time-continuous mesoscale anlysis and its use in studying the mesoscale distribution of summertime convective cloud development in the Northeastern Colorado region. |
| Location: | 0
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| Record ID: | 31/152 |
| Date: | 01/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Wergen, W. |
| Title: | The effect of model errors in variational assimilation |
| Publication: | Tellus, 44A, 297-313 |
| Abstract: | A linearized, one-dimensional shallow water model is used to investigate the effect of model errors in four-dimensional variational assimilation. |
| Location: | 0
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| Record ID: | 31/153 |
| Date: | 01/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Zou, X., I.M. Navon, F.X. Ledimet |
| Title: | An optimal nudging data assimilation scheme using parameter estimation |
| Publication: | Q.J.R. Meteorol. Soc., 118, 1163-1186 |
| Abstract: | A new optimal nudging dynamical relaxation technique is tested in the framework of 4-dimensional variational data assimilation, applied to an adiabtic T40 version of the National Meteorological Center (NMC) |
| Location: | 0
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| Record ID: | 31/154 |
| Date: | 01/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Zuo, X., I.M. Navon, F.X. Le Dimet |
| Title: | Incomplete observations and control of gravity waves in variational data assimilation |
| Publication: | Tellus, 44A, 273-296 |
| Abstract: | Methods aimed at the specification of suitably balanced initial fields, combined with a 4-D variation data assimilation, were examined and applied to a finite-dfference limited-area shallow water equations model. |
| Location: | 0
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| Record ID: | 31/155 |
| Date: | 11/01/1987 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Aune, R.M., L.W. Uccellini, R.A. Petersen, J.J. Tuccillo |
| Title: | A VAS-numerical model impact study using the Gal-Chen variational approach |
| Publication: | Mon. Wea. Rev., 115, 1009-1035 |
| Abstract: | Numerical experiments are conducted to assess the impact of incorporating temperature data from the VISSR Atmospheric Sounder (VAS) into a regional-scale numerical model using an assimilation technique developed by Gal-Chen. |
| Location: | 0
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| Record ID: | 31/156 |
| Date: | 03/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Walko, R.L., C.J. Tremback, W.R. Cotton |
| Title: | Assimilation of Doppler radar wind data into a numerical prediction model: A demonstration of certain hazards |
| Publication: | Preprints, 24th Conference on Radar Meteorology, 27-31 March 1989, Tallahassee, FL |
| Abstract: | None |
| Location: | 0
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| Record ID: | 31/157 |
| Date: | 07/01/1986 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Gal-Chen, T., B.D. Schmidt, L.W. Uccellini |
| Title: | Simulation experiments for testing the assimilation of geostationary satellite temperature retrievals into a numerical prediction model |
| Publication: | Mon. Wea. Rev., 114, 1213-1230 |
| Abstract: | Recent diagnostic studies using retrievals from the Visible Infrared Spin-Scan Radiometer (VISSR) Atmospheric Sounder (VAS) indicate that there are limitations of geostationary satellite sounding data (poor vertical resolution of temperature and moisture profiles) |
| Location: | 0
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| Record ID: | 31/158 |
| Date: | 01/01/1990 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Courtier, P., O. Talagrand |
| Title: | Variational assimilation of meteorological observations with the direct and adjoint shallow-water equations |
| Publication: | Tellus, 42A, 531-549 |
| Abstract: | Experiments of variational assimilation, similar to those already performed by the authors on a vorticity equation model are performed on a shallow-water equation model. |
| Location: | 0
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| Record ID: | 31/159 |
| Date: | 10/01/1987 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] (51) Numerical Weather Prediction |
| Author: | Kuo, Y.H., E.G. Donall, M.A. Shapiro |
| Title: | Feasibility of short-range numerical weather prediction using observations from a network of profilers |
| Publication: | Mon. Wea. Rev., 115, 2042-2427 |
| Abstract: | A series of observing system simulation experiments was conducted to investigate the feasibility of short-range numerical weather prediction using a network of profilers. |
| Location: | 0
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| Record ID: | 31/160 |
| Date: | 08/01/1987 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Ramamurthy, M.K., F.H. Carr |
| Title: | Four-dimensional data assimilation in the monsoon region. Part 1: Experiments with wind data |
| Publication: | Mon. Wea. Rev., 115, 1678-1706 |
| Abstract: | A limited-area primitive equation model has been used to study the feasibility of four-dimensional data assimilation in the monsoon region and, further, to study the applicability of several assimilation techniques currently begin employed in global models. |
| Location: | 0
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| Record ID: | 31/161 |
| Date: | 01/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Bell, R.S., O. Hammon |
| Title: | The sensitivity of fine-mesh rainfall and cloud forecasts to the initial specification of humidity |
| Publication: | Meteorol. Mag., 118, 152-158 |
| Abstract: | The problems associated with the objective analysis of humidity are discussed and a technique for amending the initial fine-mesh humidity fields is described which results in close comparison between the fine-mesh model cloud analysis and satellite imagery. |
| Location: | 0
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| Record ID: | 31/162 |
| Date: | 12/01/1987 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Kuo, Y.H., D.O. Gill, L. Cheng |
| Title: | Retrieving temperature and geopotential fields from a network of wind profiler observations |
| Publication: | Mon. Wea. Rev., 115, 3146-3165 |
| Abstract: | In this paper, we extend the 1985 work of Kuo and Anthes to develop a method to derive temperature and geopotential information from a network of wind profiler observations, which we define a thermodynamic retrieval technique. |
| Location: | 0
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| Record ID: | 31/163 |
| Date: | 08/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Chao, W.C., L.P. Chang |
| Title: | Development of a four-dimensional viarational analysis system using the adjoint method at GLA. Part 1: Dynamics |
| Publication: | Mon. Wea. Rev., 120, 1661-1671 |
| Abstract: | Recent developments in the field of data assimilation have pointed to variational analysis (essentially least-squares fitting of a model solution to observed data) using the adjoint method as a new direciton that holds the |
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| Record ID: | 31/164 |
| Date: | 11/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] (51) Numerical Weather Prediction (71) Tropical Meteorology |
| Author: | Davidson, N.E., K. Puri |
| Title: | Tropical prediction using dynamical nudging, satellite-defined convective heat sources, and a cyclone bogus. |
| Publication: | Mon. Wea. Rev., 120, 2501-2522 |
| Abstract: | Some notable problems in tropical prediction have been 1) the sensitivity to, and inaccuracies in, the four-dimensional structure of parameterized convective heating, 2) the inability of convectional |
| Location: | 1
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| Record ID: | 31/165 |
| Date: | 04/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] (41) Mesoscale Meteorology |
| Author: | Kuo, Y.H., Y.R. Guo, E.R. Westwater |
| Title: | Assimilation of precipitable water measurements into a mesoscale numerical model |
| Publication: | Mon. Wea. Rev., 121, 1251-1238 |
| Abstract: | Significant progress has been made over the past decade in the development of remote-sensing instruments to profile wind and |
| Location: | 1
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| Record ID: | 31/166 |
| Date: | 06/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Aonashi, K. |
| Title: | An initialization method to incorporate precipitaiton data into a mesoscale numerical weather prediction model |
| Publication: | J. Met. Soc. Japan, 71, 393-405 |
| Abstract: | An initialization method for the Japan spectral model (JSM) is developed for the use of precipitation observations from a radar-rainguage network over Japan. |
| Location: | 1
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| Record ID: | 31/167 |
| Date: | 05/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Bao, J.W., T.T. Warner |
| Title: | Treatment of on/off switches in the adjoint method: FDDA experiments with a simple model |
| Publication: | Tellus, 45A, 525-538 |
| Abstract: | The purpose of this study is to illustrate the feasibility of using the adjoint method in the data assimilation procedure, where the assimilation model ivolves on/off switches associated with physical processes. |
| Location: | 1
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| Record ID: | 31/168 |
| Date: | 08/01/1964 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Barnes, S.L. |
| Title: | A technique for maximizing details in numerical weather map analysis |
| Publication: | J. Appl. Met., 3, 396-409 |
| Abstract: | This paper summarizes the development of a convergent weighted-averaging interpolation scheme which can be used to obtain any desired amount of detail in the anlaysis of a set of randomly spaced data. |
| Location: | 1
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| Record ID: | 31/169 |
| Date: | 08/02/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Benjamin, S.G., R. Bleck, G. Grell, Z. Pan, T.L. Smith, J.M. Brown, J.E. Ramer, P.A. Miller, K.A Brundage |
| Title: | Aviation forecasts from the hybrid-B version of maps--effects of a new vertical coordinate and improved model physics |
| Publication: | Proc., Fifth Conf. on Aviation Weather Systems, Aug. 2-6, 1993, Vienna, VA |
| Abstract: | None |
| Location: | 1
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| Record ID: | 31/170 |
| Date: | 02/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Birkenheuer, D.L. |
| Title: | The LAPS specific humidity analysis |
| Publication: | NOAA Tech. Memo. ERL FSL-1, NOAA/ERL, FSL, Boulder, CO, 39 pp |
| Abstract: | This technical memorandum explains one aspect of the Local Analysis and Prediction System (LAPS)- the treatment of water vapor. |
| Location: | 1
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| Record ID: | 31/171 |
| Date: | 06/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Bleck, R., S.G. Benjamin |
| Title: | Regional weather prediction with a model combining terrain-following and isentropic coordinates. Part I: Model description |
| Publication: | Mon. Wea. Rev., 121, 1770-1785 |
| Abstract: | A short-range numerical prediction model, which is part of a real-time 3-h data assimilation and forecast system, is described. |
| Location: | 1
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| Record ID: | 31/172 |
| Date: | 01/01/1991 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Dee, D.P. |
| Title: | Simplification of the Kalman filter for meteorological data assimilation |
| Publication: | Q.J.R. Meteorol. Soc., 117, 365-384 |
| Abstract: | We propose a new statistical method of data assimilation that is based on a simplification of the Kalman filter equations. |
| Location: | 1
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| Record ID: | 31/173 |
| Date: | 09/01/1989 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Derber, J., A. Rosati |
| Title: | A global oceanic data assimilation system |
| Publication: | J. Phys. Ocean., 19, 1333-1347 |
| Abstract: | A global coeanic four-dimensional data assimilation system has been developed for use in initializing coupled ocean-atmosphere general circulation models and many other applications. |
| Location: | 1
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| Record ID: | 31/174 |
| Date: | 07/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Lewis, J., J. Bao |
| Title: | Variational data assimilation in meteorology using the adjoint method |
| Publication: | Adv. Space Res., 12, (7)193-(7)200 |
| Abstract: | Variational data assimilation using the adjoint method is being pursued in the Norman, Oklahoma, meteorological community by a concerted effort between meteorologists, computer scientists and mathematicians. |
| Location: | 1
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| Record ID: | 31/175 |
| Date: | 07/23/1990 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Geerts, B., P.V. Hobbs |
| Title: | Combined retrieval of thermodynamic and cloud microphysical variables in a frontal rainband observed during gale |
| Publication: | Proc., Conf. on Cloud Physics, July 23-27, 1990, San Francisco, CA, AMS, Boston, MA |
| Abstract: | None |
| Location: | 1
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| Record ID: | 31/176 |
| Date: | 01/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Li, Yong, K.K. Droegemeier |
| Title: | The influence of diffusion and associated errors on the adjoint data assimilation technique |
| Publication: | Tellus, 45A, 435-448 |
| Abstract: | We investigate the influence of diffusion, and errors associated with its representation, on the adjoint data assimilation technique. |
| Location: | 1
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| Record ID: | 31/177 |
| Date: | 05/01/1990 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Marchuk, G.I., Y.K. Skiba |
| Title: | Role of adjoint functions in studying the sensitivity of a model of the thermal interaction of the atmosphere and ocean to variations in input data |
| Publication: | Izv., Atmos. Oceanic Phys., 26, 335-342 |
| Abstract: | A method of investigating the sensivity of a model of the thermal interaction between the atmosphere and ocean to perturbations of input data is described. |
| Location: | 1
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| Record ID: | 31/178 |
| Date: | 06/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Marais, C. L.Musson-Genon |
| Title: | Forecasting the surface weather elements with a local dynamical-adaptation method using a variational technique |
| Publication: | Mon. Wea. Rev., 120, 1035-1049 |
| Abstract: | A simple method of dynamical adaptation of a mesoscale model has been tested to produce meteorological parameters locally adapted at meteorological stations. |
| Location: | 31
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| Record ID: | 31/179 |
| Date: | 09/01/1991 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | McGinley, J.A., S.C. Albers, P.A. Stamus |
| Title: | Validation of a composite convective index as defined by a real-time local analysis system |
| Publication: | Wea. Forecasting, 6, 337-356 |
| Abstract: | Advances in remote sensing from earth- and spaceborne systems, expanded in situ observation networks, and increased low-cost computer capability will allow an unprecedented view of mesoscale weather system from the local weather office. |
| Location: | 1
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| Record ID: | 31/180 |
| Date: | 01/01/1987 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | McGinley, J.A. |
| Title: | A variational objective analysis scheme for analysis of the ALPEX data set |
| Publication: | Meteorol. Atmos. Phys., 36, 5-23 |
| Abstract: | A scheme for analysis of the ALPEX II-b data set is described. |
| Location: | 1
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| Record ID: | 31/181 |
| Date: | 01/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Nair, D.R.C., B. Chakravarty, P. Niyogi |
| Title: | Implicit nonlinear normal mode initializaiton: A multigrid approach |
| Publication: | Acta Meteor. Sinica, 7, 19-30 |
| Abstract: | The implicit nonlinear normal mode initialization (INMI) is applied to a tropical limited area shallow water model in spherical coordinates. |
| Location: | 1
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| Record ID: | 31/182 |
| Date: | 04/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Nechayev, D.A., M.I. Yaremchuk |
| Title: | Data assimilation procedures in the model of passive pollutant transport |
| Publication: | Izv., Atmos. Oceanic Physics, 28, 325-328 |
| Abstract: | None |
| Location: | 1
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| Record ID: | 31/183 |
| Date: | 08/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Rabier, F., P. Courtier, O. Talagrand |
| Title: | An application of adjoint models to sensitivity analysis |
| Publication: | Beitr. Phys. Atmosph., 65, 177-192 |
| Abstract: | Adjoint models are useful tools for sensitivity analysis problems and, in the following, we will use the adjoint of a global primitive equation models to investigate the question |
| Location: | 1
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| Record ID: | 31/184 |
| Date: | 01/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Rabier, F., P. Courtier, J. Pailleux, O. Talagrand, D. Vasiljevic |
| Title: | A comparison between four-dimensional variational assimilation and simplified sequential assimilatin relying on three-dimensional variational analysis |
| Publication: | Q.J.R. Meteorol. Soc., 119, 845-880 |
| Abstract: | The aim of this study is to make a strict comparison between two assimilation algorithms, sequential and four-dimensional variational, on a 24-hour period extracted from a baroclinig instability situation respresentative of mid-latitude dynamics. |
| Location: | 1
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| Record ID: | 31/185 |
| Date: | 01/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Robertson, A.W. |
| Title: | An examination of simulated regional climate change using an adjoint method |
| Publication: | Clim. Dyn., 9, 43-51 |
| Abstract: | The adjoint of a one-layer model of tropospheric-average temperature advection is used to examine a general circulation model (GCM) doubled CO_2 scenario experiment locally over Europe. |
| Location: | 1
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| Record ID: | 31/186 |
| Date: | 01/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Stauffer, D.R., J.W. Bao |
| Title: | Optimal determination of nudging coefficients using the adjoint equations |
| Publication: | Tellus, 45A, 358-369 |
| Abstract: | The adjoint equations of a numerical model can be used for model-parameter estimation. |
| Location: | 1
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| Record ID: | 31/187 |
| Date: | 03/01/1994 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Stauffer, D.R., N.L. Seaman |
| Title: | Multiscale four-dimensional data assimilation |
| Publication: | J. Appl. Met., 33, 416-434 |
| Abstract: | Four-dimensional data assimilation (FDDA) schemes capable of effectively analyzing asynoptic, near-continuous data streams are especially important on the mesobeta scale for both model initialization and dynamic analysis. |
| Location: | 1
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| Record ID: | 31/188 |
| Date: | 12/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Stensrud, D.J., J.W. Bao |
| Title: | Behaviors of variational and nudging assimilation techniques with a chaotic low-order model |
| Publication: | Mon. Wea. Rev., 120, 3016-3028 |
| Abstract: | Variational and nudging data-assimilation schemes are examined within the framework of a model initialization problem using the Lorenz three-component model of Rayleigh-Benard convection. |
| Location: | 1
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| Record ID: | 31/189 |
| Date: | 01/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Sun, J. |
| Title: | Convective scale 4-D data assimilation using simulated single Doppler radar observations |
| Publication: | Cooperative Thesis No. 135, NCAR/CT-135, NCAR, Boulder, CO, 174 pp. |
| Abstract: | The adjoint method of variational data assimilation is used to retrieve the 3-dimensional wind and thermodynamic variables from simulated single-Doppler radar data. |
| Location: | 1
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| Record ID: | 31/190 |
| Date: | 06/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Takano, I, A. Segami |
| Title: | Assimilation and initialization of a mesoscale model for improved spin-up of precipitation |
| Publication: | J. Met. Soc. Japan, 71, 377-391 |
| Abstract: | Forecast experiments are performed from various initial states using an operational mesoscale model of JMA in order to improve the spin-up of precipitation forecasts. |
| Location: | 1
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| Record ID: | 31/191 |
| Date: | 05/01/1991 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Taylor, G.D. |
| Title: | Data assimilation and the adjoint method: An example |
| Publication: | CIRA Report No. 0737-5352-23, Cooperative Insititue for Research in the Atmosphere, Fort Collins, CO 80523 |
| Abstract: | Copies of slide of a talk preseting a method of four dimensional data assimilation based on the adjoint method via considering a simple example. |
| Location: | 1
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| Record ID: | 31/192 |
| Date: | 05/01/1991 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Taylor, G.D. |
| Title: | Data assimilation and the adjoint method: An overview |
| Publication: | CIRA No. 0737-5352-22, CIRA, Fort Collins, CO |
| Abstract: | In this note a general description of the application of the adjoint method for four-dimensional data assimilation is given. |
| Location: | 1
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| Record ID: | 31/193 |
| Date: | 01/01/1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Thepaut, J.N., D. Vasiljevic, P. Courtier, J. Pailleux |
| Title: | Variational assimilation of conventional metheorological observations with a multilevel primitive-equation model |
| Publication: | Q.J.R. Meteorol. Soc., 119, 153-186 |
| Abstract: | The paper describes a four-dimensional variational assimilation using a multilevel global primitive-equation spectral model. |
| Location: | 1
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| Record ID: | 31/194 |
| Date: | 01/01/1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Wang, Z., I.M. Navon, F.X. LeDimet, X. Zou |
| Title: | The second order adjoint analysis: Theory and applications |
| Publication: | Meteorol. Atmos. Phys., 50, 3-20 |
| Abstract: | The adjoint method application in variational data assimilation provides a way of obtaining the exact gradient of the cost function J with respect to the control variables. |
| Location: | 1
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| Record ID: | 31/195 |
| Date: | 12/01/1997 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Yu, T.W., M. Iredell, D. Keyser |
| Title: | Global data assimilation and forecast experiment using SSM/I wind speed data derived from a neural network algorithm |
| Publication: | Wea. Forecasting, 12, 859-865 |
| Abstract: | A neural network algorithm using in this study to derive Special Sensor Microwave/Imager (SSM/I) wind speeds from the Defense Meteorological Satellite Program satellite-observed brightness temperatures is briefly reviewed. |
| Location: | 1
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| Record ID: | 31/196 |
| Date: | 01/01/2000 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Fillion, L., J.-F. Mahfouf |
| Title: | Coupling of moist-convective and stratiform precipitation processes for variational data assimilation |
| Publication: | Mon. Wea. Rev., 128, pp. 109-124 |
| Abstract: | Some problems posed by the coupling of moist-convective and stratiform processes for variational assimilation of precipitation-rate data are examined in a 1D-Var framework. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/197 |
| Date: | 01/01/2000 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Park, S. K., K. K. Droegemeier |
| Title: | Sensitivity analysis of a 3D convective storm: Implications for variational data assimilation and forecast error |
| Publication: | Mon. Wea. Rev., 128, pp. 140-159 |
| Abstract: | In this study a nonhydrostatic 3D cloud model, along with an automatic differentiation tool, is used to investigate the sensitivity of a supercell storm to prescribed errors (pertubations) in the water vapor field. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/198 |
| Date: | 03-03-2000 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Guo,Y.-R., Y.-H. Kuo, J. Duhia, D. Parsons, C. Rocken |
| Title: | Four Dimensional Variational Data Assimilation of Heterogeneous Mescale Observations for a Strong Convective Case |
| Publication: | Mon. Wea. Rev., 128, 619-643 |
| Abstract: | On 19 September 1996, a squall line stretching from Nebraska to Texas with intense embedded convection moved eastward across the Kansas-Oklahoma area, where special oberservations were taken as part of a Water Vapor Intensive Observing Period sponsored by the Atmospheric Radiation Measurement program. This provided a unique opportunity to test mesoscale data assimilation strategies for a strong convective event. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/199 |
| Date: | 03-032000 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Li, Z., I.M. Navon, Y. Zhu |
| Title: | Performance of 4D-Var with different stategies for the use of adjoint physics with the FSU global spectral model |
| Publication: | Mon. Wea. Rev., 128, 668-688 |
| Abstract: | A set of four-dimensional varational data assimilation (4D-Var) experiments were conducted using both a standard method and an incremental method in an indentical twin framework. The full physics adjoint model of the Florida State University global spectral model (FSUGSM)was used in the incremental method. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/200 |
| Date: | 04/04/2000 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] (74) Land Surface - Soil/Vegetation/Snow |
| Author: | Giard, D., E. Bazile |
| Title: | Implementation of a new assimilation scheme for soil and surface variables in a global NWP model |
| Publication: | Mon. Wea. Rev., 128, 997-1015 |
| Abstract: | major changes have been introduced in the description of the soil-atmosphere-vegetation interaction i the global numerical weather prediction model ARPEGE and embedded limited area model ALADIN used at Meteo-France. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/201 |
| Date: | 07/2000 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Saroja Polavarapu, M. Tanguay, L. Fillion |
| Title: | Four-Dimensional Variational Data Assimilation with Digital Filter Initialization |
| Publication: | Monthly Weather Review, 128, 2491-2510 |
| Abstract: | A four-dimensional variational (4DVAR) data assimilation problem may be constrained so that the solution closely fits the observations but is balanced. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/202 |
| Date: | 01/01/2000 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Klinker, E., F. Rabier, G. Kelly, J.F. Mahfouf |
| Title: | The ECMWF operational implementation of four-dimensional variational assimilation. III: Experimental resutls and diagnostics with operational configuration |
| Publication: | Q.J.R. Meteorol. Soc., 126, 1191-1215 |
| Abstract: | The first two papers of this series describe the development of the operational four-dimensional variational assimilation (4D-Var) configuration implemented at the European Centre for Medium-Range Weather Forecasts (ECMWF). |
| Location: | 2
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| Record ID: | 31/203 |
| Date: | 01/01/2000 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Mahfouf, J.F., F. Rabier |
| Title: | The ECMWF operational implementation of four-dimensional variational assimilation. II: Experimental results with improved physics |
| Publication: | Q.J.R. Meteorol. Soc., 126, 1171-1190 |
| Abstract: | A comprehensive set of physical parameterizations has been linearized for use in the European Centre for Medium-Range Weather Forecasts (ECMWFs) incremental four-dimensional variational (4D-Var) system described in Part I. |
| Location: | 2
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| Record ID: | 31/204 |
| Date: | 01/01/2000 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Rabier, F., H. Jarvinen, E. Klinker, J.F. Mahfouf, A. Simmons |
| Title: | The ECMWF operational implementation of four-dimensional variational assimilation. I: Experimental results with simplified physics |
| Publication: | Q.J.R. Meteorol. Soc., 126, 1143-1170 |
| Abstract: | This paper presents results of a comparison between four-dimensional variational assimilation (4D-var) using a 6-hour assimilation window and simplified physics during the minimization, and three-dimensional variational assimilation (3D-Var). |
| Location: | 2
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| Record ID: | 31/205 |
| Date: | 01/01/2000 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Nuret, M., M. Chong, J.-P. Lafore, O. Bousquet, V. Gouget |
| Title: | Onthe impact of Doppler radar derived wind fields in a mesoscale nonhydrostatic model |
| Publication: | Q.J.R. Meteorol. Soc., 126, 2461-2486 |
| Abstract: | Fine-scale three dimensioal wind fields retrived from airbone doppler radar observations within an oceanic tropical mesoscale convective systems (MCS), during the Tropical Ocean/Gobal Atmosphere Coupled Ocean- Atmosphere Response Experiment, are used to enhance the initial conditions of a non-hydrostatic mesoscale model. |
| Location: | 2
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| Record ID: | 31/206 |
| Date: | 11/01/2000 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Marecal, V., J.-F. Mahfouf |
| Title: | Variational retrieval of temperature and humidity profiles from TRMM precipitation data |
| Publication: | Mon. Wea. Rev., 128, 3853-3866 |
| Abstract: | This paper examines the performance of a one dimensional variational (IDVAR) assimilation of Tropical Rainfall Measuring Mission satellite-derived surface rainfall rates from the Microwave imager TML. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/207 |
| Date: | 11/01/2000 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Chou, C.-B., H.-P. Huang |
| Title: | Application of AVHRR data to a one-dimensional variational retrieval scheme for cloudy TOVS data |
| Publication: | Mon. Wea. Rev., 128, 3867-3878 |
| Abstract: | The use of the Advance Very High Resolution Radiometer (AVHRR) data in a one-dimensional variational scheme is examined to retrieve cloud parameters and atmospheric profiles. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/208 |
| Date: | 11/01/2000 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Bayler, G.M., R.M. Aune, W.H. Raymond |
| Title: | NWP cloud initialization using GOES sounder data and improved modeling of nonprecipitating clouds |
| Publication: | Mon.Wea. Rev., 128, 3911-3920 |
| Abstract: | Cloud-top pressures and effective cloud amounts, derived from Geostationary Operational Environmental Satellite (GOES) sounders, are used to specify a three-dimensional mesoscale cloud field for numerical weather prediction. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/209 |
| Date: | 01/01/201 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Gustafsson,N., L. berre, S. Hornquist, X.Y. Huang, M. Lindskog, B. Navascues, K.S. Mogensen, S. Torsteinsson |
| Title: | Three-dimensional variational data assimilation for a limited area model Part I: Genernal formulation and the background error constraint |
| Publication: | Tellus,53A, 425-446 |
| Abstract: | A 3-dimensional varational data assimilation (3d-Var) scheme for the HIgh Resolution Limited Area Model (HIRLAM) forecasting system is described. |
| Location: | 2
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| Record ID: | 31/210 |
| Date: | 01/01/2001 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Lindskog, M., N. Gustafsson, B. Navascues, K.S. Mogensen, X.Y Huang, X. Yang, U Andrae, L. Berre, S. Thorsteinsson, J. Rantakokko |
| Title: | Three-dimensional variational data assimilation for a limited area model Part II Observation handling and assimilation experiments |
| Publication: | Tellus, 53A, 447-468 |
| Abstract: | A 3-dimensional varational data ssimilation (3D-Var) scheme for the HIgh Resolution Limited Area Model (HIRLAM) forecasting system is described. |
| Location: | 2
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| Record ID: | 31/211 |
| Date: | 10/24/2001 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Zupanski, D., M. Zupanski, E. Rogers, D.F. Parrish, G.J. DiMego |
| Title: | Fine resolution 4DVAR data assimilation for the great plains tornado outbreak of May 3rd, 1999 |
| Publication: | Wea. Fore., Accepted |
| Abstract: | The National Centers for Environmental prediction (NCEP) fine resolution four- dimensional varational (4DVAR) data assimilation system is used to study the Grreat Plains tornado outbreak of May 3rd 1999. |
| Location: | 2
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| Record ID: | 31/212 |
| Date: | 3/2002 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Wang, Z., K. Sassen |
| Title: | Cirrus Cloud Microphysical Property Retrieval Using Lidar and Radar Measurements. Part i: Algorithm Description and Comparison with In Situ Data |
| Publication: | J. Appl. Meteor.41, 218-229 |
| Abstract: | A retrieval algorithm is described to estimate vertical profiles of cirrus-cloud ice water content (IWC) and general effective size D from combined lidar and radar measurements. |
| Location: | 0
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| Record ID: | 31/213 |
| Date: | 09/1999 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Gao, J., M. Xue, A. Shapiro, K.K. Droegmeier |
| Title: | A Variational Method for the Analysis of Three-Dimensional Wind Fields from Two Doppler Radars |
| Publication: | Mon. Wea. Rev., 127, 2128-2142 |
| Abstract: | This paper proposes a new method of dual-Doppler radar analysis based on a variational approach. |
| Location: |
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| Record ID: | 31/214 |
| Date: | 01/2001 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Gao, J., M. Xue, A. Shapiro, Q. Xu, K.K. Droegemeier |
| Title: | Three-Dimensional Simple Adjoint Velocity Retrivals from Single-Doppler Radar |
| Publication: | J. Atmos. Oceanic Technol., 18, 26-38 |
| Abstract: | In this paper the original simple adjoint method of Qiu and Xu is improved and tested for retrieving the 3D storm-scale wind field from single Doppler radar data. |
| Location: |
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| Record ID: | 31/215 |
| Date: | 1998 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Rabier, F., J.N. Thepaut, P. Courtier |
| Title: | Extended assimilation and forecast experiments with a four-dimensional variational assimilation system |
| Publication: | Q.J.R. Meteorol. Soc., 124, 1861-1887 |
| Abstract: | Results of four-dimensional variational assimilations, 4D-Var in cycling mode, over a few two-week assimilation periods are presented. |
| Location: |
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| Record ID: | 31/216 |
| Date: | 1996 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Yang, S., W.R. Cotton |
| Title: | A Method of gradient desent data assimilation |
| Publication: | 11th Conference on Numerical Weather Prediction, 19-23 Aug. Norfolk, VA. AMS |
| Abstract: | none |
| Location: | reprints box 35
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| Record ID: | 31/217 |
| Date: | 1995 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Yang, McAnelly, Xu, Cotton |
| Title: | Extending the TREC technique to a spatially filtered variational method |
| Publication: | 27th Conference on Radar Meteorology, 9-13 October, 1995, Vail, CO. |
| Abstract: | none |
| Location: | reprints box 32
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| Record ID: | 31/218 |
| Date: | 1993 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Verlinde, Cotton |
| Title: | Fitting microphysical observations of nonsteady convective clouds to a numerical model: An application of the adjoint technique of data assimilation to a kinematic model |
| Publication: | Mon. Wea. Rev., 121, 2776-2793 |
| Abstract: | none. |
| Location: | reprints box 30
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| Record ID: | 31/219 |
| Date: | 1992 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Verlinde, Cotton |
| Title: | Kinematic Microphysical Retrieval in Non-steady Clouds |
| Publication: | 11th Conference on Clouds & Precipitation 17-21 August 1992, Montreal, Quebec, CANADA |
| Abstract: | none. |
| Location: | reprints box 29
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| Record ID: | 31/220 |
| Date: | 1991 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Copeland, Pielke, Cotton |
| Title: | The effects of four-dimensional data density on assimilation for a shallow-water model with the adjoint method: Preliminary results |
| Publication: | 9th Conference on Numerical Weather Prediction, 14-18 October 1991, Denver, CO. |
| Abstract: | none. |
| Location: | reprints box 28
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| Record ID: | 31/221 |
| Date: | 1990 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Verlinde, Cotton |
| Title: | A critical look at kinematic microphysical retrieval algorithims |
| Publication: | Conference on Cloud Physics, July 23-27 1990, San Francisco, CA. |
| Abstract: | none. |
| Location: | reprints box 27
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| Record ID: | 31/222 |
| Date: | 1990 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Henry, Cotton, Tremback |
| Title: | Impact of latent heating rates-Inferred from precipitation rates on predictions of the mesoscale convective systems with RAMS |
| Publication: | Conference on Cloud Physics, July 23-27 1990, San Francisco, CA. |
| Abstract: | none. |
| Location: | reprints box 27
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| Record ID: | 31/223 |
| Date: | 01/01/2002 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Janiskova, M., J.F. Mahfouf, J.J. Morcrette |
| Title: | Preliminary studies on the variational assimilation of cloud-radiation observations |
| Publication: | Q.J.R. Meteorol. Soc., 128, 2713-2736. |
| Abstract: | A linearized cloud scheme and a radiation scheme including cloud effects have been developed at the ECMWF to assimilate cloud properties in the framework of the 4D-Var system. |
| Location: | 2
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| Record ID: | 31/224 |
| Date: | 02/01/2004 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Jones, A.S., T. Vukicevic, T.H. Vonder Haar |
| Title: | A microwave satellite observational operator for variational data assimilation of soil moisture |
| Publication: | J. Hydromet., 5, 213-229. |
| Abstract: | An observational operator and its adjoint have been created that are suitable for use within variational data assimilation using polarized 6- and 10-GHz passive microwave satellite observations. |
| Location: | 2
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| Record ID: | 31/225 |
| Date: | 03/01/2005 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Houtekamer, P.L., H.L. Mitchell, G. Pellerin, M. Buehner, M. Charron, L. Spacek, B. Hansen |
| Title: | Atmospheric Data Assimilation with an Ensemble Kalman Filter: Results with Real Observations |
| Publication: | Mon. Wea. Rev., 133, 604-620 |
| Abstract: | None. |
| Location: | Citation Only, Full Text Not In Library |
| Record ID: | 31/226 |
| Date: | 04/01/2005 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Zupanski, M., D. Zupanski, T. Vukicevic, K. Eis, and T. Vonder Haar |
| Title: | CIRA/CSU Four-dimensional variational data assimilation system |
| Publication: | Mon. Wea. Rev., 133, 829-843. |
| Abstract: | A new four-dimensional variational data assimilation (4DVAR) system is developed at the Cooperative Institute for Research in the Atmosphere (CIRA/Colorado State University (CSU). |
| Location: | 2
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| Record ID: | 31/227 |
| Date: | 11/01/2005 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Daya, A., J. Sun, C. Snyder |
| Title: | A comparison between the 4DVAR and the ensemble Kalman Filter techniques for radar data assimilation |
| Publication: | Mon. Wea. Rev., 133, 3081-3094. |
| Abstract: | A four-dimensional variational data assimilation (4DVAR) algorithm is compared to an ensemble Kalman filter (EnKF) for the assimulation of radat data at the convective scale. |
| Location: | 2
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| Record ID: | 31/228 |
| Date: | 03/01/2006 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Vukicevic, T. M. Sengupta, A.S. Jones, T. Vonder Haar |
| Title: | Cloud-resolving satellite data assimilation: Information content of IR window observations and uncertainties in estimation |
| Publication: | J. Atmos. Sci., 63, 901-919 |
| Abstract: | This study addresses the problem of four-dimensional ($D) estimation of a cloudy atmosphere on cloud-resolving scale using satellite remote sensing measurements. |
| Location: | 2
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| Record ID: | 31/229 |
| Date: | 03/01/2006 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Vukicevic, T. M. Sengupta, A.S. Jones, T. Vonder Haar |
| Title: | Cloud-resolving satellite data assimilation: Information content of IR window observations and uncertainties in estimation |
| Publication: | J. Atmos. Sci., 63, 901-919 |
| Abstract: | This study addresses the problem of four-dimensional (4D) estimation of a cloudy atmosphere on cloud-resolving scale using satellite remote sensing measurements. |
| Location: | 2
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| Record ID: | 31/230 |
| Date: | 05/01/2007 |
|---|---|
| Subject: | (31) Four-Dimensional Data Assimilation [4DDA] |
| Author: | Mansell, Edward R., Conrad L. Ziegler, Donald R. MacGorman |
| Title: | A Lightning Data Assimilation Technique for Mesoscale Forecast Models |
| Publication: | Monthly Weather Review, 135, 1710-1709. |
| Abstract: | Lightning observations have been assimilated into a mesoscale model for improvement of forecast initial conditions. Data are used from the National Lightning Detection Network (cloud-to-ground lightning detection) and a Lightning Mapping Array (total lightning detection) that was installed in western Kansas–eastern Colorado. |
| Location: | http://ams.allenpress.com/perlserv/?request=get-toc&issn=1520-0493&volume=135&issue=5
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| Record ID: | 31/231 |