GPM卫星降水产品在珠江流域的适用性评价
Applicability Evaluation of GPM Satellite Precipitation Products in Pearl River Basin
投稿时间:2020-08-13  修订日期:2020-08-13
DOI:
中文关键词:  GPM  CMFD  珠江流域  极端降水  探测率
英文关键词:GPM  CMFD  Pearl River Basin  extreme precipitation  probability of detection
基金项目:国家自然科学基金面上项目(51779278)
作者单位邮编
杜 懿 中山大学地理科学与规划学院 510275
王大洋 中山大学地理科学与规划学院 
张 智 中山大学地理科学与规划学院 
王大刚 中山大学地理科学与规划学院 510275
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中文摘要:
      本文以珠江流域为研究区域,以CMFD高精度再分析降水数据集为真值,对2010-2018年的GPM卫星降水产品进行适用性评价,主要从各时间尺度精度表现、日降水探测能力、极端降水监测能力等方面进行研究分析。结果表明,GPM卫星降水产品在珠江流域具有较高的应用精度,多年平均相对误差仅为6.85%,皮尔逊相关系数高达0.94;GPM卫星降水产品对日降水的探测能力与降水强度关系密切,降水强度越大,探测能力越弱,当日降水强度为8mm/d时,探测能力最佳;GPM卫星降水产品对珠江流域极端降水事件的监测能力较好,能较为准确地刻画极端降水的空间分布状况。整体来看,GPM卫星降水产品在珠江流域具有较高的应用潜力,其在长时间尺度上精度表现更好,对中等强度降水事件的捕捉能力更强。
英文摘要:
      Taking CMFD as the validation dataset to evaluate the applicability of GPM in the Pearl River Basin from 2010 to 2018, and mainly analyzed the daily precipitation detection ability and extreme precipitation monitoring ability of GPM. The results show that GPM has high application precision in Pearl River Basin, the multi-year mean relative error is 6.85%, Pearson"s correlation coefficient is 0.94; The detection ability of GPM to the daily precipitation is closely related to the precipitation intensity, the greater the precipitation intensity, the weaker the detection ability, when the precipitation intensity is 8mm/d, the detection ability is the best; GPM has a good monitoring ability for extreme precipitation events in the Pearl River Basin and can describe the spatial distribution of extreme precipitation accurately. On the whole, GPM has a high application potential in the Pearl River Basin, with better precision performance in the long time scale and better ability to capture moderate intensity precipitation events.
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