摘要
以岷江流域中国气象局23个地面观测站点的降水数据资料为基准,通过计算4种精度评价指标(CC,RMSE,MAE,RB),综合指标KGE和4种降水事件探测能力指标(POD,FAR,BIAS,CSI),分析了IMERG和GSMaP系列产品的误差特性,重点探讨了地球同步卫星和微波传感器探测精度对降水产品精度的影响。结果表明IMERG_CAL和GSMaP_Gauge降水产品均能准确反应降水的时空分布特性;GS⁃MaP_Gauge在小型降雨检测能力的表现上优于IMERG_CAL;IMERG_IR对降水的空间分布精度优于IMERG_HQ,阐述了不同数据来源对IMERG_CAL和IMERG_UNCAL降水产品探测精度有影响。IMERG_CAL和GSMaP_Gauge卫星降水产品可用于岷江流域的水文气象研究。
The purpose of this article is to evaluate the applicability of IMERG and GSMaP series products over Min Jiang watershed.Based on the 23 ground observations precipitation of China Meteorological Administration(CMA),error characteristics of the IMERG(IMERG_CAL,IMERG_UNCAL,IMERG_IR,IMERG_HQ)and GSMaP(GSMaP_MVK,GSMaP_Gauge)were evaluated by combining four statistical indices(CC,RMSE,MAE,RB),Modified Kling-Gupta efficiency score(KGE)and four categorical indices(POD,FAR,BIAS,CSI).The effect of the detection accuracy of infrared(IR)sensors with geosynchronous Earth orbit satellites and passive microwave(PMW)sensors on the precision of precipitation products is discussed.The results show that both IMERG_CAL and GSMaP_Gauge precipitation products can accurately reflect the spatial and temporal distribution of precipitation.GSMaP_Gauge outperforms IMERG_CAL in terms of its ability to detect small-scale rainfall.The spatial distribution accuracy of IMERG_IR is better than that of IMERG_HQ,while IMERG_HQ has better ability to detect precipitation events.The influence of different sensors sources on the detection performance to IMERG_CAL and IMERG_UNCAL products is expounded.IMERG_CAL and GSMaP_Gauge satellite precipitation products can be used for hydrometeorological research over Min Jiang watershed.
作者
张利平
覃光华
杨玲玲
周末
ZHANG Liping;QIN Guanghua;YANG Lingling;ZHOU Mo(College of Water Resource and Hydropower,Sichuan University,Chengdu 610065,China;State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University,Chengdu 610065,China)
出处
《水文》
CSCD
北大核心
2022年第6期93-98,共6页
Journal of China Hydrology
基金
国家重点研发计划资助项目(2019YFC1510701)
国家自然科学基金面上项目(51879172)。
