IMPACTS OF MONTHLY ANOMALIES OF INTRASEASONAL OSCILLATION OVER SOUTH CHINA SEA AND SOUTH ASIA ON THE ACTIVITY OF SUMMER MONSOON AND RAINFALL IN EASTERN CHINA

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摘要 Theimpactofstrong(weak)intraseasonaloscillation(ISO)overSouthChinaSea(SCS)andSouthAsia(SA)insummerontheSCSandSAsummermonsoonandthesummerrainfallinEasternChinaarestudiedbyusingtheNCEP-NCARanalysisdataandtherainfalldataof160stationsinChinafrom1961to2010.Itisfoundthattheimpactsaresignificantlydifferentindifferentmonthsofsummer.ThestudyshowsthatinJuneandJulycyclonic(anticyclonic)atmosphericcirculationoverSCSandSAcorrespondstostrong(weak)ISOoverSCS.InAugust,however,strong(weak)ISOoverSCSstillcorrespondstocyclonic(anticyclonic)atmosphericcirculationoverSA.InJuneandAugustcyclonic(anticyclonic)atmosphericcirculationoverSouthAsiacorrespondstostrong(weak)ISOoverSAwhileastrong(weak)ISOcorrespondstoanticyclonic(cyclonic)atmosphericcirculationoverSAinJuly.Besides,inJunethestrong(weak)ISOoverSAcorrespondstocyclonic(anticyclonic)atmosphericcirculationoverSCS,whileinJulyandAugusttheatmosphericcirculationisinthesamephaseregardlessofwhethertheISOoverSAisstrongorweak.Theimpactsofthestrong(weak)ISOoverSCSontherainfallofeasternChinaaresimilarinJuneandJuly,whichfavorsless(more)rainfallinYangtze-HuaiheRiversbasinbutsufficient(deficient)rainfallinthesouthofYangtzeRiver.However,theimpactsarenotsoapparentinAugust.InSouthAsia,thestrong(weak)ISOinJulyresultsinless(more)rainfallinthesouthofYangtzeRiverbutsufficient(deficient)rainfallinYangtze-HuaiheRiversbasin.TheinfluenceontherainfallineasternChinainJuneandAugustisnotassignificantasinJuly.
机构地区 不详
出版日期 2016年02月12日(中国期刊网平台首次上网日期,不代表论文的发表时间)
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