Improvement of High-Resolution Satellite Rainfall Product for Typhoon Morakot (2009) over Taiwan

被引：50

作者：

Taniguchi, Aina ^{[1
]}

Shige, Shoichi ^{[1
]}

Yamamoto, Munehisa K. ^{[1
]}

Mega, Tomoaki ^{[1
]}

Kida, Satoshi ^{[2
]}

Kubota, Takuji ^{[2
]}

Kachi, Misako ^{[2
]}

Ushio, Tomoo ^{[3
]}

Aonashi, Kazumasa ^{[4
]}

机构：

[1] Kyoto Univ, Grad Sch Sci, Kyoto 6068502, Japan

[2] Japan Aerosp Explorat Agcy, Earth Observat Res Ctr, Tsukuba, Ibaraki, Japan

[3] Osaka Univ, Dept Elect Elect & Informat Engn, Suita, Osaka, Japan

[4] Japan Meteorol Agcy, Meteorol Res Inst, Tsukuba, Ibaraki, Japan

来源：

JOURNAL OF HYDROMETEOROLOGY | 2013年 / 14卷 / 06期

关键词：

Algorithms; Microwave observations; Remote sensing; Satellite observations; Flood events; Orographic effects; PASSIVE MICROWAVE; PROFILING ALGORITHM; PART I; PRECIPITATION; GSMAP; TMI; RETRIEVALS; FLOOD; JAPAN;

D O I：

10.1175/JHM-D-13-047.1

中图分类号：

P4 [大气科学（气象学）];

学科分类号：

0706 ; 070601 ;

摘要：

The authors improve the high-resolution Global Satellite Mapping of Precipitation (GSMaP) product for Typhoon Morakot (2009) over Taiwan by using an orographic/nonorographic rainfall classification scheme. For the estimation of the orographically forced upward motion used in the orographic/nonorographic rainfall classification scheme, the optimal horizontal length scale for averaging the elevation data is examined and found to be about 50 km. It is inferred that as the air ascends en masse on the horizontal scale, it becomes unstable and convection develops. The orographic/nonorographic rainfall classification scheme is extended to the GSMaP algorithm for all passive microwave radiometers in orbit, including not just microwave imagers but also microwave sounders. The retrieved rainfall rates, together with infrared images, are used for the high-resolution rainfall products, which leads to much better agreement with rain gauge observations.

引用

页码：1859 / 1871

页数：13

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