
利用祁连山地区甘肃省境内的加密地面观测资料,采用TS(Threat Score)评分、一致性指数与CSI(Critical Success Index)等对全球降水观测(Global Precipitation Measurement
GPM)的降水数据进行了客观评估。结果表明(:1)GPM资料能够表征祁连山地区不同季节降水的主要落区,同时该资料低估了弱降水区的量值,高估了强降水区的量值;(2)祁连山地区形成小雨的频率最高,达85.95%,中雨、大雨和暴雨的频次较少,分别为12.04%、1.89%和0.1%;GPM资料探测结果与观测较为一致(;3)GPM资料能够较好捕捉到夏、秋季节降水主要集中在早晨和夜间的特征,对冬季降水日变化特征捕捉的效果最差。总体上看,GPM资料能够较好地表征祁连山地区复杂地形下的降水特征。
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