Study on the Variational Assimilation Technique for the Retrieval of Wind Fields from Doppler Radar Data

作     者：万齐林 薛纪善 庄世宇 

作者机构：Institute of Tropical and Marine Meteorology Chinese Academy of Meteorological Sciences 

出 版 物：《Acta meteorologica Sinica》 (ACTA METEOROLOGICA SINICA)

年 卷 期：2006年第20卷第1期

页      面：1-19页

学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学] 

基　　金：Supported by Research on Innovative Meteorological NWP Techniques in China (2001BA607B)Research on Monitoring and Forecasting Techniques of Landfall Typhoon in China (2001DIA20026) 

主　　题：variational assimilation technique wind fields Doppler radar data 

摘      要：This paper introduces a variational assimilation technique for the retrieval of wind fields from Doppler radar data. The assimilated information included both the radial velocity （RV） and the movement of radar echo. In this assimilation technique, the key is transforming the movement of radar echo to a new radar measuring variable- ＂apparent velocity＂ （AV）. Thus, the information of wind is added, and the indeterminacy of recovering two-dimensional wind only by AV was overcome effectively by combining RV with AV. By means of CMA GRAPES-3Dvar and CINRAD data, some experiments were performed. The results show that the method of retrieval of wind fields is useful in obtaining the construction of the weather system.