GPM卫星降水产品在长江流域应用的精度估算-豆柴文库

您所在位置：网站首页 / GPM卫星降水产品在长江流域应用的精度估算.docx / 文档详情

在线预览结束，喜欢就下载吧，查找使用更方便

5 金币

下载文档

/ 2

下载提示

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

文本预览

GPM卫星降水产品在长江流域应用的精度估算
Title:EvaluationoftheAccuracyofGPMSatellitePrecipitationProductsintheYangtzeRiverBasin
Introduction:
TheaccurateestimationofprecipitationisessentialforvarioushydrologicalapplicationsintheYangtzeRiverBasin.However,conventionalprecipitationobservationnetworksoftenhavelimitedcoverageandsufferfromvarioussourcesoferrors.Toovercomethesechallenges,satellite-basedprecipitationproductshaveemergedasavaluablealternative,providingwide-areacoverageandcontinuousmonitoringcapabilities.TheGlobalPrecipitationMeasurement(GPM)satellitemissionoffersasuiteofrainfallproductsthatcanpotentiallyimproveprecipitationestimationintheYangtzeRiverBasin.ThispaperaimstoassesstheaccuracyofGPMsatelliteprecipitationproductsinthiskeyriverbasin.
MethodologyandData:
ToevaluatetheaccuracyofGPMsatelliteprecipitationproducts,wecomparedthemwithground-basedprecipitationobservationsfromvariousraingaugesintheYangtzeRiverBasin.Thestudyperiodcoversseveralyearstocapturedifferenthydrologicalconditionsandseasonalvariations.Theraingaugedatausedinthisstudywereobtainedfromthenationalmeteorologicalnetwork,whichprovidesreliableandquality-controlledprecipitationmeasurements.
TheGPMsatelliteprecipitationproductsusedinthisanalysisincludedtheIntegratedMulti-satellitERetrievalsforGPM(IMERG)earlyandlaterunproducts.IMERGcombinespassivemicrowaveandinfraredsatelliteobservationsfrommultiplesatellites,integratingthemintoagriddedprecipitationdatasetwithatemporalresolutionof30minutesandaspatialresolutionof0.1degrees.
AccuracyAssessment:
ToassesstheaccuracyoftheGPMsatelliteprecipitationproducts,weemployedvariousstatisticalmetricscommonlyusedinprecipitationvalidationstudies.Thesemetricsincludedcorrelationcoefficients,rootmeansquareerrors(RMSE),bias,andprobabilityofdetection(POD)analysis.Themetricswerecalculatedforbothevent-basedandmonthlyrainfallestimates,enablingacomprehensiveevaluationoftheGPMsatelliteproducts'performance.
ResultsandDiscussion:
TheanalysisrevealedthattheGPMsatelliteprecipitationproductsdemonstra