摘要
WiththeERA40reanalysisdailydatafor1958-2001,theglobalatmosphericseasonal-meandiabaticheatingandtransientheatingarecomputedbyusingtheresidualdiagnosisofthethermodynamicequation.Thethree-dimensionalstructuresforthetwotypesofheatingaredescribedandcompared.Itisdemonstratedthatthediabaticheatingisbasicallycharacterizedbystronganddeepconvectiveheatinginthetropics,shallowheatinginthemidlatitudesanddeepcoolinginthesubtropicsandhigh-latitudes.Thetropicaldiabaticheatingalwaysshiftstowardsthesummerhemisphere,butthemidlatitudeheatingandhigh-latitudecoolingtendtobestronginthewinterhemisphere.Ontheotherhand,thetransientheatingduetotransienteddytransferischaracterizedbyameridionaldipolepatternwithcoolinginthesubtropicsandheatinginthemid-andhigh-latitudes,aswellasbyaverticaldipolepatterninthemidlatitudeswithcoolingatlowerlevelsandheatinginthemid-andhigher-levels,whichgivesrisetoaslopedstructureinthetransientheatingorientedfromthelowerlevelsinthehighlatitudesandhigherlevelsinthemidlatitudes.Thetransientheatingiscloselyrelatedtoastormtrackalongwhichthetransienteddyactivityismuchstrongerinthewinterhemispherethaninthesummerhemisphere.InNorthernHemisphere,thetransientheatinglocatesinthewesternoceanicbasin,whileitiszonally-orientedinSouthernHemisphere,forwhichthetransientheatingandcoolingarefarseparatedoverSouthPacificduringthecoldseason.Thetransientheatingtendstocancelthediabaticheatingovermostoftheglobe.However,itdominatesthemid-troposphericheatinginthemidlatitudes.Therefore,theatmospherictransientprocessesacttohelptheatmospheregainmoreheatinthehigh-latitudesandinthemid-troposphereofmidlatitudes,reallocatingtheatmosphericheatobtainedfromthediabaticheating.
出版日期
2012年04月14日（中国期刊网平台首次上网日期，不代表论文的发表时间）
