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大气科学  2005 

GMS-5卫星估计中国西部地区月降水

DOI: 10.3878/j.issn.1006-9895.2005.04.03

Keywords: GMS卫星,全球降水气候项目数据集,GOES卫星降水指数

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Abstract:

在气候降水数据集中,中国西部地区的降水数据精度一直偏低,如全球降水气候项目数据集(GPCP)数据1998年年平均相对误差在100°E以西达到100%以上,由于这一地区人烟稀少,缺少足够的地面雨量站,极轨卫星时间覆盖率低,GMS静止卫星高度角偏低,给这一地区的降水测量和估计带来困难.本文尝试将GOES卫星降水指数(GPI)算法拓展应用到这一区域,同时,为了消除卫星高度角偏低造成的影响,利用当地气候资料,引入相对湿度修正因子.结果表明,用GMS静止卫星云图结合气候资料,可以有效估计中

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