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4DVAR同化反演多普勒雷达资料在一次强降水中的应用
引用本文:燕成玉,闵锦忠,裴宇杰,李宗涛,张宝贵. 4DVAR同化反演多普勒雷达资料在一次强降水中的应用[J]. 气象与减灾研究, 2012, 35(2): 31-36
作者姓名:燕成玉  闵锦忠  裴宇杰  李宗涛  张宝贵
作者单位:1. 秦皇岛市气象局,河北秦皇岛,066000
2. 南京信息工程大学大气科学学院,江苏南京,210044
3. 河北省气象局,河北石家庄,050021
摘    要:利用秦皇岛多普勒天气雷达资料,应用干模式的4DVAR系统反演发生在河北省昌黎县的一次强降水过程的二维风场,得到较为真实的中小尺度天气系统状况。强降水发生在"人"字形切变线的暖式切变线的前侧,当暖式切变线附近出现中-γ尺度闭合气旋性环流时,降水进一步增强。由于采用干模式的变分方法,每4 min就可完成一次风场的反演,其业务化前景非常乐观。

关 键 词:4DVAR  反演  雷达资料  低层风场

APPLICATION OF DOPPLER RADAR DATA RETRIEVED BY 4DVAR DURING A HEAVY RAINFALL PROCESS
Yan Chengyu , Min Jinzhong , Pei Yujie , Li Zongtao , Zhang Baogui. APPLICATION OF DOPPLER RADAR DATA RETRIEVED BY 4DVAR DURING A HEAVY RAINFALL PROCESS[J]. Meteorology and Disaster Reduction Research, 2012, 35(2): 31-36
Authors:Yan Chengyu    Min Jinzhong    Pei Yujie    Li Zongtao    Zhang Baogui
Affiliation:1. Qinhuangdao Meteorological Bureau, Qinhuangdao 066000, China 2. School of Atmospheric Sciences, NUIST, Nanjing 210044, China 3. Hebei Meteorological Bureau, Shijiazhuang 050021, China
Abstract:Based on Qinhuangdao Doppler radar data, this paper retrieves two-dimension wind field of a heavy rainfall process in Changli county of Qinhuangdao by adopting 4DVAR method in dry model, and obtains more realistic situation of meso- and micro-scale weather system. The heavy rainfall occurred in the front side of the warm shear line. It is found that the precipitation became heavier when the cyclonic meso-γ-scale closed circulation appeared near the warm shear line. A retrieval of wind field can be completed per four minutes due to adopting the variational method of the dry model, and its operationlization prospect will be very optimistic.
Keywords:4DVAR  Retrieval  Doppler radar data  Wind field in low layer
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