摘要
WeusetheU.S.Navy'sMasterOceanographicObservationDataSet(MOODS)fortheYellowSea/EastChinaSea(YES)toinvestigatetheclimatologicalwatermassfeaturesandtheseasonalandnon-seasonalvariabilitiesofthethermohalinestructure,andusetheComprehensiveOcean-AtmosphereDataSet(COADS)from1945to1989toinvestigatethelinkagebetweenthefluxes(momentum,heat,andmoisture)acrosstheair-oceaninterfaceandtheformationofthewatermassfeatures.Afterexaminingthemajorcurrentsystemsandconsideringthelocalbathymetryandwatermassproperties,wedivideYESintofiveregions:EastChinaSea(ECS)shelf,YellowSea(YS)Basin,Chejubifurcation(CB)zone,TaiwanWarmCurrent(TWC)region,KuroshioCurrent(KG)region.Thelongtermmeansurfaceheatbalancecorrespondstoaheatlossof30Wm-2intheESCandCBregions,aheatlossof65Wm-2intheKGandTWCregions,andaheatgainof15Wm-2intheYSregion.Thesurfacefreshwaterbalanceisdefinedbyprecipitationminusevaporation.Theannualwaterlossfromthesurfaceforthefivesubareasrangesfrom1.8to4cmmonth-1.Thefreshwaterlossfromthesurfaceshouldbecompensatedforfromtheriverrun-off.Theentirewatercolumnoftheshelfregion(ECS,YS,andCB)undergoesanevidentseasonalthermalcyclewithmaximumvaluesoftemperatureduringsummerandmaximummixedlayerdepthsduringwinter.However,onlythesurfacewatersoftheTWCandKGregionsexhibitaseasonalthermalcycle.WealsofoundtwodifferentrelationsbetweensurfacesalinityandtheYangtzeRiverrun-off,namely,out-of-phaseintheEastChinaSeashelfandin-phaseintheYellowSea.ThismayconfirmanearlierstudythatthesummerfreshwaterdischargefromtheYangtzeRiverformsarelativelyshallow,lowsalinityplume-likestructureextendingoffshoreonaveragetowardsthenortheast.
出版日期
2005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)