气象学报Issue(1)：133-151,19.DOI:10.11676/qxxb2014.012
集合方根滤波同化多普勒雷达资料在一次飑线过程中的应用研究
摘要
Abstract
The effectiveness of using an Ensemble Square Root Filter (EnSRF)to assimilate real Doppler radar observations is investigated by applying the technique to a case of squall line occurred on 12 July 2005 in the midwestern part of Shandong Province as done by the Weather Research and Forecasting (WRF)model.The experimental results show that,(1)the EnSRF system has the ability to effectively assimilate Doppler radar data:since the information at convective scale is added into the nu-merical model through radar data assimilation the analyzed field is improved noticeably,the model spin-up time is shortened, and the surface precipitation forecast is improved correspondingly;(2)compared with the forecast of control run,the forecast initiated from the EnSRF analysis can give a more accurate prediction of the microphysical field,and the predicted wind field and thermal field are reasonable and they are in accordance with the characteristic of convective storm;(3 )the propagation di-rection of the squall line forecasted by the ensemble mean analysis is consistent with observations,but the propagation speed is faster than observed speed,because of the nonlinear development of the convective storm,the period of validity of forecast is a-bout 5 to 6 hours.关键词
雷达资料同化/集合方根滤波/飑线Key words
Radar data assimilation/Ensemble Square Root Filter/Squall line分类
天文与地球科学引用本文复制引用
秦琰琰,龚建东,李泽椿,盛日锋..集合方根滤波同化多普勒雷达资料在一次飑线过程中的应用研究[J].气象学报,2014,(1):133-151,19.基金项目
国家自然科学基金青年项目（41105067）、国家高技术研究发展计划（863计划）项目（2013AA09A506-5）。 （）
