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HUBEX区域资料同化系统
REGIONAL DATA ASSIMILATION SYSTEM OF HUAIHE BASIN EXPERIMENT (HUBEX)
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摘要: 介绍HUBEX区域资料同化系统。这个系统采用6 h周期的间歇资料同化方法, 利用全球粗网格分析场资料, 形成冷启动的初估场和同化模式的边界条件。系统还包括资料质量控制、σ面最优插值客观分析、张弛逼近 (Nudging) 初值化、中尺度同化模式预报和后处理等部分, 对来自全球通讯系统、HUBEX加密观测的资料和国家卫星气象中心的导风资料进行同化。最后, 用1998年6月24~28日长江流域的暴雨过程对这个资料同化系统进行测试。Abstract:
The Regional Data Assimilation System (RDAS) of Huaihe Basin Experiment (HUBEX) is presented. The RDAS is an intermittent assimilation system in which an assimilation cycle includes four analyses in a daily period. Both the first guess fields for the cold starting of the system and the boundary conditions for the assimilation model are supplied by products of the global model system. The RDAS consists of quality control, σ-surface optimum interpolation objective analysis, nudging initialization, mesoscale assimilation model forecast and post-processing. The observational data from the Global Telecommunication System (GTS), HUBEX intensive observation period (IOP) and National Satellite Meteorological Center are assimilated. Finally, a heavy rain process in June 24—28, 1998 is tested using the RDAS.
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Key words:
- HUBEX intense observation;
- Data assimilation system;
- Case test;
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图 3 1998年6月26日00 :00~06:00UTC降雨量 (间隔:10, 25, 50 mm)
(a) 观测, (b) 方案A 6 h预报, (c) 方案B 6 h预报, (d) 方案C 6 h预报
图 4 1998年6月25日00 :00 UTC~26日00:00 UTC降雨量 (间隔:10, 25, 50, 100, 150 mm)
(a) 观测, (b) 方案A 4次同化6 h预报累积, (c) 方案D 4次同化6 h预报累积, (d) 方案A 24 h预报, (e) 方案B 24 h预报, (f) 方案C 24 h预报
图 5 1998年6月26日00 :00~06:00 UTC在强暴雨地点 (29.2°N, 115.5°E)
表 1 HUBEX资料同化系统使用的资料
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[1] Roger Daley.Atmospheric data assimilation.Second International Symposium on Assimilation of Observations in Meteorology and Oceanography.Tokyo, Japan, 13-17 March 1995.21-22. [2] 陶士伟.台风、暴雨数值预报的观测资料预处理和初步的质量控制方案.台风暴雨业务数值预报方法和技术研究.北京:气象出版社, 1995.192-197. [3] 朱宗申, 马清云, 张跃堂, 等.有限区域σ面客观分析方案.台风、暴雨业务数值预报方法和技术研究.北京:气象出版社, 1995.482-490. [4] Thomas T.Warner.Assimilation of data with mesoscale meteorological models.International Symposium on Assimilation of Observations in Meteorology and Oceanography, Clermont-Ferrand France, 3-9 July 1990.165-170. [5] Georg A.Grell, Jimy Dudhia and David R.Stauffer.A description of the fifth-generation penn state/NCAR mesoscale model (MM5).NCAR/TN-398+STR NCAR Technical Note.1994. [6] Davies M C.A lateral boundary formulation for multilevel prediction model.Q.J.R.Meteorol.Soc., 1976, 102:405-418. http://www.baidu.com/link?url=dNzPwbsJJjDdZUdfaZTl4NhopnZ_54v8lPUfaXMgLV_2ERMFdOJ6F0lBXhtFdAM-puUXFpYcEr2rDkkUag1eN1joaufmyHJmhR-jzc4AdFX7XWxHXHcEAPoQz9bwMBoxlJnRhazM1apsKj39QMibvWkmyjn1L92mPfvtoy4zNcE_Oj3VzbcUlSZa1JYWFCzyJttxHUUeLUR3mZ6Q3umsARbP6AADfP5ouevyVOLqV6cmv_A96ciUi4WaWPGlwYei9w4tn3_mrkCCqQ9aHT4pbbrl6AgsGQ-yITpilkv8dbqBOSa0y7iOXgL8OAKHmRwpJ8xwyLRPP3mjzFXCrMWla_&wd=&eqid=efb5a732003ccffe0000000558a141e9 [7] 朱宗申, 马清云, 郝民, 等.台风试验陆地加密观测在数值天气预报中的作用.应用气象学报, 1999, 10 (1):105-111. http://qikan.camscma.cn/jams/ch/reader/view_abstract.aspx?file_no=19990137&flag=1 -
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