简介:Basedonaseriesofdataanalyses,theintimaterelationsbetweenanomalouswintermonsooninEastAsiaandElNinoarcstudiedinthispaper.AnomalisticcirculationintheNorthernHemispherecausedbyElNinoeventcanleadtoenhancingtheFerre!cellandthewesterliesinthemid-latitudesastheHadleycellandresultinthelocationofthefrontzoneinEastAsiatothenorth.TheseareunfavourableforthecoldwavebreakingoutsouthwardinEastAsia.Therefore,thereatewarmerweatherandweakerwintermonsooninEastAsiainElNinowinter.TherearestrongerandfrequentcoldwavesinEastAsiaduringthewintertimepriortotheoccurrenceofElNinoevent.TheywillinducestrongerwintermonsooninEastAsia.Thus,theweakenedtradewindandenhancedcumulusconvectionintheequatorialmiddle-westernPacificareacausedbythestrongerwintermonsoonwillplayanimportantroleintheoccurrenceofElNinoevent.Therefore,theanomalouslystrongwintermonsooninEastAsiaduringwinter