20197.南亞季風(fēng)區(qū)5月降水年際變化的影響因子分析

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3、majorityofsummermonsooninSouthAsiahasestablishedwheretheSouthAsianmonsoonregionreferstotheArabianSea，IndiaBayofBengalandIndoChinapeninsulaThisarticleutilizes31years’data(19792009)ofprecipitation，atmosphericcirculationand

4、seasurfacetemperature，wefoundtheprecipitationofSouthAsiansummermonsoonregionismainlyinfluencedbytheEuropeWestAsiateleconnectionandENSOseasurfacetemperatureanomalythetwofactorsaremutualindependence(thecorrelationcoefficie

5、ntoftwofactorsisO11，itdidnotpass95％reliabilitytest)FirstEurope—WestAsiateleconnectioncorrespondtoEuropeandWestoftheQinghaiTibetplateautemperatureanomalyWhenEuropeWestAsiateleconnectionshowspositivetemperatureanomalyonthe

6、WestQinghaiTibetplateau，itmeanspositivetemperatureanomalyonland，anditavailsreversedlandseatemperaturegradientMoreoverENSOseasurfacetemperatureanomalymaincorrespondswiththeEquatorialseasurfacetemperatureanomalyWhentheENSO

7、showsLaNifiaSeasurfacetemperatureanomalyitmeansnegativeseasurfacetemperatureanomalyonIndianOcean，anditalsoavailsreversaloflandseatemperaturegradientBoththetwokindsoftemperatureanomalyavailreversedofland—seatemperaturegra

8、dientthereversedoftemperaturegradientavailslow1evelwesterlywindanomalyonIndianOceanZonalwindanomalyisconducivetotheestablishmentoftheSouthAsiansummermonsoonandithelpstowatervaportransportationinSouthAsiansummermonsoonare

9、aEventuallythereversalofthetemperaturegradientleadstoincreasedprecipitationonSouthAsiansummermonsoonareaLowLatitudePlateauareaisatypicalrepresentativeoftheSouthAsiansummermonsoonregionWefoundthattheprecipitationinLowLati

10、tudePlateauandtheprecipitationinSouthAsiansummermonsoonhaveacloselyrelationship(thecorrelationcoefficientbetweenthetwoareasis082，itpassed95％reliabilitytest)SoweselectLowLatitudePlateauprecipitationasaspecialcaseoftheSout