应用FY-3A/MWHS资料反演太平洋海域晴空大气湿度廓线  

RETRIEVAL OF CLEAR SKY MOISTURE PROFILES IN THE PACIFIC USING MEASUREMENTS OF MWHS FROM FY-3A SATELLITE

作　　者：王曦[1] 李万彪[1] 

机构地区：[1]北京大学物理学院大气与海洋科学系/气候与海-气实验室,北京100871

出　　处：《热带气象学报》2013年第1期47-54,共8页Journal of Tropical Meteorology

基　　金：国家自然科学基金国际(地区)合作与交流项目(40921160380)资助

摘　　要：发展Smith迭代算法,建立适用于微波波段的物理迭代算法。采用搭载于FY-3A卫星之上的微波湿度计亮温数据及矢量辐射传输模式,对我国西北太平洋海域晴空区域的大气水汽廓线进行反演计算。反演得到的水汽廓线与MODIS水汽廓线产品比较,单点结果表明,反演混合比廓线与MODIS水汽廓线趋势一致,下层水汽反演能力较中上层强;500 hPa水汽场反演结果表明,可基本反映水汽干湿中心分布情况,反演水汽混合比值与MODIS产品相比偏低。经统计所有气压层反演结果与MOD07水汽廓线产品相比偏差均控制在5.76g/kg以内。An improved Smith iterative method, which generally applies to microwave bands, is described. The moisture profiles retrieved from the brightness temperature data of microwave humidity sounder onboard FY-3A satellite, pertaining to clear sky, are shown over North-West Pacific by using a vector-discrete ordination radiative transfer model. The retrieved profiles are compared with those from MODIS products, and the results of single point show that they are in good agreement with the results for lower layers. The distribution of retrieved humidity at 500hpa is basically consistent with the actual situation, and the values are lower than that of the MODIS products. Compared with MODIS products, RMS is within 5.76g/kg at every single level separately.

关 键 词：大气探测 水汽廓线 微波物理迭代 FY-3A MWHS 西北太平洋 

分 类 号：P414.4[天文地球—大气科学及气象学]