TMI微波亮温反演热带气旋KUJIRA(T0302)降水结构  

Precipitation Structure Retrieval of Tropical Cyclone KUJIRA(T0302) with TMI

作　　者：元慧慧 王彦磊 李杰 路泽廷 郑红莲 朱尚卿 

机构地区：[1]解放军61741部队海洋环境中心 [2]解放军61741部队气象中心 [3]解放军61855部队

出　　处：《气象与环境科学》2010年第1期7-11,共5页Meteorological and Environmental Sciences

摘　　要：利用热带降雨测量卫星的微波成像仪(TMI)和星载测雨雷达(PR)资料,选取2003年第2号热带气旋KUJIRA降水个例,采用高频通道直接组合方案和全通道间接对数组合方案建立了多频道线性回归算式,对4种不同分辨率(0.1、0.2、0.25、0.5)进行了TMI反演降水试验。结果表明,运用全通道间接对数组合法反演降水效果明显优于常用的高频通道反演效果,且更稳定,因此,低频通道微波信息在降水反演中的作用是不可忽视的。运用0.2和0.25分辨率反演降水效果优于0.1和0.5分辨率,其中0.2分辨率更具实际应用价值。Using the microwave brightness temperature data from TMI and the precipitation rate from TRMM/PR for No. 2 tropical cyclones KUJIRA in 2003, the precipitation retrieval algorithm was constructed with high-frequency channel direct composite scheme and total channel indirect logarithmic composite scheme. Four different resolutions （0.1, 0.2, 0.25, 0.5） had been tested separately in retrieval experiments with microwave brightness temperature data. The experiments show the effect of precipitation retrieval using total channel indirect logarithmic composite scheme is superior to the scheme in common use for the retrieval only with high-frequency channel data significantly, and the scheme is more stable. It suggests that the low-frequency microwave information in the retrieval of precipitation is useful to precipitation retrieval. Best retrieval resolution is 0.2 and 0.25, without losing retrieval information. The 0.2 resolution is more preferable.

关 键 词：TRMM/TMI 降水雷达 反演 热带气旋降水 分辨率 

分 类 号：P412.27[天文地球—大气科学及气象学]