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VARIATIONAL: 作品数：647被引量：975H指数：13; 导出分析报告; 相关领域：理学更多>>; 相关作者：彭立国高原梁维刘希强蔡明军更多>>; 相关机构：东南大学华东师范大学淮北煤炭师范学院沈阳工业大学更多>>; 相关期刊：更多>>; 相关基金：国家自然科学基金国家重点基础研究发展计划中国博士后科学基金国家教育部博士点基金更多>>

One-Dimensional Variational Retrieval of Temperature and Humidity Profiles from the FY4A GIIRS被引量：4: 《Advances in Atmospheric Sciences》2022年第3期471-486,共16页Qiumeng XUE Li GUAN Xiaoning SHI; supported in part by the National Key Research and Development Program of China under Grant No.2018YFC1507302;in part by the National Natural Science Foundation of China under Grant No.41975028。; A physical retrieval approach based on the one-dimensional variational(1 D-Var) algorithm is applied in this paper to simultaneously retrieve atmospheric temperature and humidity profiles under both clear-sky and part...; 关键词：temperature and humidity profiles one-dimensional variational(1D-Var) GIIRS hyperspectral data

Satellite All-sky Infrared Radiance Assimilation:Recent Progress and Future Perspectives被引量：8: 《Advances in Atmospheric Sciences》2022年第1期9-21,共13页Jun LI Alan JGEER Kozo OKAMOTO Jason AOTKIN Zhiquan LIU Wei HAN Pei WANG; partially supported by the JPSS PGRR science program(NA15NES4320001);the NOAA Joint Technology Transfer Initiative(NA19OAR4590240)at CIMSS/University of Wisconsin-Madison。; Satellite infrared(IR)sounder and imager measurements have become one of the main sources of data used by data assimilation systems to generate initial conditions for numerical weather prediction(NWP)models and atmosp...; 关键词：satellite data assimilation all-sky radiances variational and ensemble data assimilation

Variational Quality Control of Non-Gaussian Innovations in the GRAPES m3DVAR System: Mass Field Evaluation of Assimilation Experiments被引量：2: 《Advances in Atmospheric Sciences》2021年第9期1510-1524,共15页Jie HE Xulin MA Xuyang GE Juanjuan LIU Wei CHENG Man-Yau CHAN Ziniu XIAO; supported by the China Scholarship Council;primarily sponsored by the National Key R&D Program of China (Grant No.2018YFC1506702 and Grant No.2017YFC1502000)。; The existence of outliers can seriously influence the analysis of variational data assimilation.Quality control allows us to effectively eliminate or absorb these outliers to produce better analysis fields.In particul...; 关键词：variational quality control non-Gaussian distribution INNOVATION OUTLIER data assimilation

A Four-Dimensional Variational System for Skillful Operational Prediction of Convective Storms: 《Advances in Atmospheric Sciences》2016年第10期1102-1103,共2页Nathan SNOOK Qinghong ZHANG; Forecasting convective storms using NWP models is an important goal and a highly active area of ongoing research. Skillful and reliable NWP of convective storms could allow for severe weather warnings with longer lead...; 关键词：VDRAS A Four-Dimensional Variational System for Skillful Operational Prediction of Convective Storms NWP

Assimilating Surface Observations in a Four-Dimensional Variational Doppler Radar Data Assimilation System to Improve the Analysis and Forecast of a Squall Line Case被引量：8: 《Advances in Atmospheric Sciences》2016年第10期1106-1119,共14页Xingchao CHEN Kun ZHAO Juanzhen SUN Bowen ZHOU Wen-Chau LEE; primarily supported by the National Fundamental Research 973 Program of China(Grant No.2013CB430101);the National Natural Science Foundation of China(Grant Nos.41275031,41322032 and 41475015);the Social Commonwealth Research Program(Grant Nos.GYHY201506004 and GYHY201006007);the Program for New Century Excellent Talents in Universities of China; This paper examines how assimilating surface observations can improve the analysis and forecast ability of a four- dimensional Variational Doppler Radar Analysis System （VDRAS）. Observed surface temperature and wind...; 关键词：VDRAS 4-D data assimilation radar data surface data squall line

Application of a Recursive Filter to a Three-Dimensional Variational Ocean Data Assimilation System被引量：1: 《Advances in Atmospheric Sciences》2010年第2期293-302,共10页刘叶闫长香; supported by the Chinese Academy of Science(Contract No. KZCX2-YW-202);the 973 Pro-gram (Grant No. 2006CB403606);the National Natural Science Foundation of China (Grant Nos. 40606008,40776011); In order to improve the efficiency of the Ocean Variational Assimilation System （OVALS）, which has been widely used in various applications, an improved OVALS （OVALS2） is developed based on the recursive filter ...; 关键词：recursive filter background error covariance the Ocean Variational Assimilation System （OVALS）

A New Global Four-Dimensional Variational Ocean Data Assimilation System and Its Application被引量：1: 《Advances in Atmospheric Sciences》2008年第4期680-691,共12页刘娟王斌刘海龙俞永强; Acknowledgements. The authors would like to thank Mr. R. W. Reynolds for providing the guess error variance of the OISST data. All computations of this work were completed on IAP1801 computer. This work was supported jointly by the Key Direction Project of the Chinese Academy of Sciences Knowledge Innovation Program （Grant No. KZCX-SW-230）, the 973 Project （Grant No. 2005CB321703）, and the National Natural Science Foundation of China （Grant No. 40221503）.; A four-dimensional variational data assimilation （4DVar） system of the LASG/IAP Climate Ocean Model, version 1.0 （LICOM1.0）, named LICOM-3DVM, has been developed using the three-dimensional variational data assimi...; 关键词：3DVM 4DVAR ocean data assimilation LICOM SST

Assimilated Tidal Results of Tide Gauge and TOPEX/POSEIDON Data over the China Seas Using a Variational Adjoint Approach with a Nonlinear Numerical Model被引量：13: 《Advances in Atmospheric Sciences》2006年第3期449-460,共12页韩桂军李威何忠杰刘克修马继瑞; In order to obtain an accurate tide description in the China Seas, the 2-dimensional nonlinear numerical Princeton Ocean Model （POM） is employed to incorporate in situ tidal measurements both from tide gauges and TO...; 关键词：TIDES variational adjoint approach tidal gauges TOPEX/POSEIDON the China Seas

Estimating Heat Fluxes by Merging Profile Formulae and the Energy Budget with a Variational Technique被引量：12: 《Advances in Atmospheric Sciences》2004年第4期627-636,共10页张述文邱崇践张卫东; This work was supported by the National Natural Science Foundation of China under Grant No.E-D0119-90202014;the National Key Programme for Developing Basic Sciences of China under Great No.G1998040902.; A variational technique (VT) is applied to estimate surface sensible and latent heat fluxes based on observations of air temperature, wind speed, and humidity, respectively, at three heights (1 m, 4 m, and 10 m), and ...; 关键词：heat flux Bowen ratio profile method variational technique

Progresses of Researches on Numerical Weather Prediction in China: 1999-2002被引量：11: 《Advances in Atmospheric Sciences》2004年第3期467-474,共8页薛纪善; The recent progresses in the research and development of (NWP) in China are reviewed in this paper. The most impressive achievements are the development of direct assimilation of satellite irradiances with a 3DVAR (th...; 关键词：PROGRESS numerical weather prediction three-dimentional variational SEMI-LAGRANGIAN SEMI-IMPLICIT

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