利用LAPS系统同化地基GPS水汽资料的应用研究  

APPLICATION OF GROUND-BASED GPS WATER VAPOR IN LAPS

作　　者：李红莉[1] 万蓉[1] 谢有才 

机构地区：[1]中国气象局武汉暴雨研究所 [2]上海91528部队气象台

出　　处：《热带气象学报》2010年第6期702-709,共8页Journal of Tropical Meteorology

基　　金：国家自然基金(40575011、40930951);科技部公益行业专项(GYHY200706012、GYHY200906010、GYHY201006003);武汉暴雨所基本科研业务费专项(1011);中国气象局气象新技术推广项目(CMATG2008Z08);武汉暴雨所开放基金(0912);湖北省气象科技发展基金(2007Z03);湖北省GPS水汽反演及应用技术研究共同资助

摘　　要：介绍了武汉暴雨研究所引进的LAPS系统(Local Analysis and Prediction System)在水汽分析中应用GPS水汽资料的方法。设计三种试验方案与实况进行对比分析,并结合WRF模式模拟,研究GPS水汽资料在LAPS系统中的作用以及对预报的影响。结果表明,LAPS同化GPS水汽资料后,对湿度场产生较大调整;对比各方案LAPS输出的可降水量后发现,GPS水汽资料的作用比雷达资料大一个量级;从模式模拟试验结果比较看出,LAPS对GPS水汽的同化能改善GPS测站分布区域降水预报,并对下游暴雨的预报也有正效果,能提高暴雨量级的Ts降水评分。The principal and method of GPS water vapor used in humidity analysis of LAPS（Local Analysis and Prediction System） is introduced.Three test schemes are designed.The role of GPS water vapor in LAPS and its impact on precipitation forecast are studied by comparing with observation and in conjunction with WRF model simulation.The results show as follows.The humidity field is greatly adjusted by assimilating GPS water vapor in LAPS.The impacts of GPS water vapor are greater than radar data by comparing the total precipitable water analyzed by LAPS in each scheme.The experiment results of model simulation indicate that by assimilating GPS water vapor with LAPS it can improve precipitation forecast in the area of GPS stations distribution and has positive effect on the downstream rainfall forecast.

关 键 词：数值模拟 同化 LAPS GPS水汽 雷达 

分 类 号：P435[天文地球—大气科学及气象学]