"中国登陆台风外场科学试验"风廓线仪探测资料在四维同化中的初步应用研究  

RESEARCHES ON ATMOSPHERIC PROFILE OBSERVATIONS OF "CLATEX" IN FOUR-DIMENSIONAL DATA ASSIMILATION

作　　者：张胜军[1] 徐祥德[1] 吴庆梅[2] 孟智勇[1] 

机构地区：[1]中国气象科学研究院,北京100081 [2]北京市气象局,北京100089

出　　处：《应用气象学报》2004年第B12期101-109,共9页Journal of Applied Meteorological Science

基　　金：国家科技基础条件平台工作项目"气象资料共享系统建设"国家自然科学基金项目"登陆台风结构和强度突变及其影响的机理研究"(40175019)共同资助。

摘　　要：该文将"中国登陆台风外场科学试验"(CLATEX)中得到的风廓线仪探测资料加入到模式中进行牛顿张弛逼近(nudging)四维同化分析,并讨论在同化过程中不同nudging时间间隔以及不同逼近因子对风场及降水数值模拟结果的影响。结果表明:将风廓线仪探测资料通过nudging技术同化到模式中,一定程度上改善了对降水的数值模拟结果;单纯应用nudging技术及单点的风廓线仪探测资料,通过缩短nudging时间间隔以最终改进同化效果有一定局限性;合理的选择逼近因子值(4.0×10-4s-1)得到的同化结果与实况更为接近。With strong tropical cyclone 'Vongfong' as the target typhoon, and adopting the wind-profiler data gained from 'CLATEX' into nudging four-dimensional data assimilation process of meso-scale model MM5V3, the influence of the different nudging-assimilation interval and nudging factor on the simulation were detected. Results demonstrate that the assimilated initial field was changed, the simulation of rainfall with assimilated initial field is better than that with directly objective analyzed field to some extend. Furthermore, the simulation is not changed too much by shortening the nudging time-interval in terms of the nudging method and the data from a single observation station. With nudging factor 4.0×10-4s-1, the simulation is closer to the observations.

关 键 词：风廓线仪 登陆台风 四维同化 探测资料 降水 风场 时间间隔 外场 逼近 因子 

分 类 号：P444[天文地球—大气科学及气象学]