Seasonal Variability of the Yellow Sea／East China Sea Surface Fluxes and Thermohaline Structure-中国期刊网

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.

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Seasonal Variability of the Yellow Sea／East China Sea Surface Fluxes and Thermohaline Structure

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Seasonal Variability of the Yellow Sea／East China Sea Surface Fluxes and Thermohaline Structure

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