摘要
IncontrasttopreviousstudiesthathavetendedtofocusontheinfluenceofthetotalArcticsea-icecoverontheEastAsiansummertripolerainfallpattern,thepresentstudyidentifiestheBarentsSeaasthekeyregionwheretheJunesea-icevariabilityexertsthemostsignificantimpactsontheEastAsianAugusttripolerainfallpattern,andexplorestheteleconnectionmechanismsinvolved.TheresultsrevealthatareductioninJuneseaiceexcitesanomalousupwardairmotionduetostrongnear-surfacethermalforcing,whichfurthertriggersameridionalAnomalousdownwardmotionthereforeformsovertheCaspianoverturningwave-likepatternextendingtomidlatitudes.Sea,whichinturninduceszonallyorientedoverturningcirculationalongthesubtropicaljetstream,exhibitingtheeast-westRossbywavetrainknownastheSilkRoadpattern.ItissuggestedthattheBoninhigh,asubtropicalanticyclonepredominantnearSouthKorea,showsasignificantanomalyduetotheeastwardextensionoftheSilkRoadpatterntoEastAsia.AsapossibledescendingbranchoftheHadleycell,theBoninhighanomalyultimatelytriggersameridionaloverturning,establishingthePacific-Japanpattern.ThisinturninducesananomalousanticycloneandcyclonepairoverEastAsia,andatripoleverticalconvectionanomalymeridionallyorientedoverEastAsia.Consequently,atripolerainfallanomalypatternisobservedoverEastAsia.Resultsfromnumericalexperimentsusingversion5oftheCommunityAtmosphereModelsupporttheinterpretationofthischainofevents.
出版日期
2018年01月11日（中国Betway体育网页登陆平台首次上网日期，不代表论文的发表时间）
