低纬高原地区多元信息综合变分分析试验  

Variational Assimilation Experiment of the Multi-Information Analysis over Low Latitude Plateau

作　　者：段旭[1] 王曼[1] 张杰[2] 许美玲[2] 

机构地区：[1]云南省气象科学研究所,云南昆明650034 [2]云南省气象台,云南昆明650034

出　　处：《高原气象》2010年第3期712-718,共7页Plateau Meteorology

基　　金：云南省科技攻关及高新技术计划(2006SG25);上海台风研究基金项目(2008ST03)共同资助

摘　　要：利用高分辨率雷达、卫星降水反演数据和地面降水观测资料,建立联合降水估算场并对其进行变分订正,得到0.1°×0.1°细网格降水同化场。同化资料包括2008年6～8月逐日4次FY-2卫星和CINRAD/CC雷达降水估算资料、地面自动站降水观测资料,试验结果表明,采用变分方法对卫星及雷达联合降水估算场进行同化后,所得结果既较真实地反映了地面观测网天气尺度信息,也对低纬高原地区降水离散性分布特征的描述有较大的改善。The high-resolution radar and satellite precipitation estimates and ground observation data are used to create the joint field of rainfall estimates and revise it by the variational technique,0.1°×0.1° fine mesh precipitation assimilation field is obtained.Assimilation of information includes the rainfall estimated from FY-2 satellite and CINRAD/CC radar with four times a day in June～August 2008 and the precipitation data of automatic surface station.After the joint field of rainfall estimates assimilation by the variational method,the results show that the assimilation data not only indicate the weather-scale information of the ground observation network,but also better reveal the discrete characteristics of precipitation over low latitude Plateau.

关 键 词：低纬高原 变分方法 同化试验 降水量 多元信息 联合估算场 

分 类 号：P414.4[天文地球—大气科学及气象学]