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Satellite estimates and subpixel variability of rainfall in a semi-arid grassland

Yong Chen Jing Duan Junling An Huizhi Liu Ulrich G?rsdorf Franz H.Berger

大气和海洋科学快报（英文版）2021，Vol.14Issue(5)：24-29,6.

Satellite estimates and subpixel variability of rainfall in a semi-arid grassland

Yong Chen ¹Jing Duan ²Junling An ¹Huizhi Liu ¹Ulrich G?rsdorf ³Franz H.Berger³

作者信息

1. State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry,Institute of Atmospheric Physics,Chinese Academy of Sciences,Beijing China
2. State Key Laboratory of Severe Weather&Key Laboratory for Cloud Physics of China Meteorological Administration,Chinese Academy of Meteorological Sciences,Beijing China
3. Meteorologisches Observatorium Lindenberg/Richard Aβmann Observatory,Deutscher Wetterdienst,Lindenberg Germany
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摘要

Abstract

卫星估雨精度的不确定性受到当地降雨类型和像元内降雨非均匀性影响,而结合这两个关键因素开展半干旱草原卫星估雨的研究有限.2009年夏,我们在中国锡林郭勒半干旱草原用多部微雨雷达和雨量计构建了9 km卫星像元降雨观测网,观测了像元内降雨非均匀性(空间变异系数CV),并评估了卫星估雨精度.结果表明:(1)CV值受像元内平均降雨量,降雨类型,降雨云面积及移向等影响,如高Cv值的降雨过程大多为平均降雨量小,对流性降雨过程,降雨云边缘像元CV值较高;(2)TRMM 3B42V7卫星估雨产品适用性较好,CMORPH和PERSIANN次之,但TRMM 3B42V7易在半干旱草原湖泊处高估降雨.

关键词

卫星估算降雨/降雨非均匀性/微雨雷达/TRMM

Key words

Satellite rainfall estimation/Rainfall variability/Micro Rain Radar/TRMM

引用本文复制引用

Yong Chen,Jing Duan,Junling An,Huizhi Liu,Ulrich G?rsdorf,Franz H.Berger..Satellite estimates and subpixel variability of rainfall in a semi-arid grassland[J].大气和海洋科学快报（英文版）,2021,14(5):24-29,6.

基金项目

This work was funded by the National Key R&D Program of China[grant number 2017YFC1501404],the German Research Foundation[Research Unit 536],and the National Natural Science Foundation of China[grant number 41675137]. （）

大气和海洋科学快报（英文版）

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ISSN：1674-2834

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