摘要
TheinfluenceoftheArcticatmosphereonNorthernHemispheremidlatitudetroposphericweatherandclimateisexploredbycomparingtheskilloftwosetsof14-dayweatherforecastexperimentsusingtheECMWFmodelwithandwithoutrelaxationoftheArcticatmospheretowardsERA-Interimreanalysisdataduringtheintegration.TwopathwaysareidentifiedalongwhichtheArcticinfluencesmidlatitudeweather：apronouncedoneoverAsiaandEasternEurope,andasecondaryoneoverNorthAmerica.Ingeneral,linkagesarefoundtobestrongest（weakest）duringborealwinter（summer）whentheamplitudeofstationaryplanetarywavesovertheNorthernHemisphereisstrongest（weakest）.NodiscernibleArcticimpactisfoundovertheNorthAtlanticandNorthPacificregion,whichisconsistentwithpredominantlysouthwesterlyflow.Ananalysisoftheflow-dependenceofthelinkagesshowsthatanomalousnortherlyflowconditionsincreasetheArcticinfluenceonmidiatitudeweatheroverthecontinents.Specifically,ananomalousnortherlyflowfromtheKaraSeatowardsWestAsialeadstocoldsurfacetemperatureanomaliesnotonlyoverWestAsiabutalsooverEasternandCentralEurope.Finally,theresultsofthisstudyarediscussedinthelightofpotentialmidlatitudebenefitsofimprovedArcticpredictioncapabilities.
出版日期
2018年01月11日（中国期刊网平台首次上网日期，不代表论文的发表时间）
