摘要
ByemployingtheNCEP/NCARreanalysisdatasets(1000to10hPa,2.5°×2.5°),thethermalforcingimpactsareanalyzedofaneasterlyvortex(shortenedasEV)overthetropicaluppertroposphereonthequasi-horizontalmovementoftheWesternPacificSubtropicalAnticyclone(shortenedasWPSA)during22-25June2003.Therelevantmechanismsarediscussedaswell.Itisshownthatthedistributionandintensityofthenon-adiabaticeffectneartheEVresultintheanomalouseastwardretreatoftheWPSA.TheWPSAprefersextendingtothecolderregion,i.e.,itmovestowardtheregioninwhichthenon-adiabaticheatingisweakeningorthecoolingisstrengthening.DuringtheWPSAretreat,theapparentchangesofnon-adiabaticheatingillustratethecharacteristicsofenhancedcoolingintheeastsideoftheEV.Meanwhile,thecoolinginthewestsideexhibitsaweakenedeastwardtrend,mostprominentlyat300hPainthetroposphere.Theevidenceonthefactorscausingthechangeinthermalconditionisfound:themostimportantcontributiontotheheating-ratetrendistheverticaltransportterm,followedinturnbythelocalchangeintheheatingratetermandthehorizontaladvectionterm.Asaresult,theatmosphericnon-adiabaticheatinggeneratedbytheverticaltransportandlocalchangediscussedaboveismainlyconnectedtotheretreatoftheWPSA.
出版日期
2016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）
