简介：Climatologyoftheisothermallayerdepth(ILD)andthemixedlayerdepth(MLD)hasbeenproducedfromin-situtemperature-salinityobservationsintheEastChinaSea(ECS)since1925.ThemethodsappliedontheglobalareusedtocomputetheILDandtheMLDintheECSwithatemperaturecriterionΔT=0.8℃fortheILD,andadensitycriterionwithathresholdΔσθcorrespondingtofixedΔT=0.8℃fortheMLD,respectively.WiththederivedclimatologyILDandMLD,themonthlyvariationsofthebarrierlayer(BL)andthecompensationlayer(CL)intheECSareanalyzed.TheBLmainlyexistsintheshallowwaterregionoftheECSduringApril-Junewiththicknesslargerthan15m.FromDecembertonextMarch,theareaalongtheshelfbreakfromnortheastofTaiwanIslandtothenortheastECSischaracterizedbytheCL.Twokindsofmaintemperature-salinitystructuresoftheCLinthisareaaregiven.

简介：ThispaperpresentsactualityofinvestigationandstudyofthecrustalstructurecharactersofEastChinaSeaathomeandabroad.Basedonlotsofinvestigationandstudyachievementsandthedifferenceofthecrustalvelocitystructurefromwesttoeast,theEastChinaSeaisdividedintothreeparts-EastChinaSeashelfzone,OkinawaTroughzoneandRyukyuarc-trenchzone.TheEastChinaSeasheffzonemostlyhasthreevelocitylayers,i.e.,thesedimentblanketlayer(thevelocityis5.8-5.9km/s),thebasementlayer(thevelocityis6.0-6.3km/s),andthelowercrustallayer(thevelocityis6.8-7.6km/s).SotheEastChinaSeashelfzonebelongstothetypicalcontinentalcrust.TheOkinawaTroughzoneislocatedatthetransitionalbeltbetweenthecontinentalcrustandtheoceaniccrust.Itstillhasthestructuralcharactersofthecontinentalcrust,andnoformationoftheoceaniccrust,butthecrustofthecentraltroughhasbecometothinningdown.TheRyukyuarc-trenchzonebelongstothetransitionaltypecrustasawhole,buttheoceansideofthetrenchalreadybelongstotheoceaniccrust.AndthenorthwestPhilippineBasintotheeastoftheRyukyuTrenchabsolutelybelongstothetypicaloceaniccrust.

简介：AsynopticsnapshotinthisstudyismadefortheEastCapeEddy(ECE)basedontheWorldOceanCirculationExperiment(WOCE)P14CHydrographicSectionandShipboardADCPvelocityvectordatacollectedinSeptember1992.TheECEisananticycloniceddy,barotropicallystructuredandcenteredat33.64°Sand176.21°E,withwarmandsalinouscoredsubsurfacewater.TheradiusoftheeddyisoftheorderO(110km)andthemaximumcircumferentialvelocityisO(40cms-1);asaresult,therelativevorticityisestimatedtobeO(7×10-6s-1).DuetotheexistenceoftheECE,themixedlayernorthofNewZealandbecomesdeeper,reachingadepthof300mintheaustralwinter.TheECEplaysanimportantroleintheformationanddistributionoftheSubtropicalModeWater(STMW)overaconsiderableareaintheSouthPacific.

简介：OnthebasisofthedataofoceanographicsurveyintheEastChinaSeainfourseasonsduring1997～2000(23°30′～33°00′N,118°30′～128°E),thevariationoftotalbiomassanddietbiomassofzooplanktonandtheirspatial-temporaldistributionandrelationshipwiththefishinggroundofEngraulisjaponicusareapproachedandanalyzed.Theresultsshowthattheaveragebiomassis65.32mg/m3infourseasons,autumn(86.18mg/m3)beinggreaterthansummer(69.18mg/m3)greaterthanspring(55.67mg/m3)greaterthanwinter(50.33mg/m3).Theaveragevalueofdietzooplanktonbiomassis40.9mg/m3.Thetrendsofhorizontaldistributionbothinthetotalbiomassandthedietbiomassofzooplanktonaresimilar.Thehighbiomassregion(250～500mg/m3)isverylimited,onlyaccountingfor1%oftheinvestigationarea.SeasonalvariationofthebiomassisveryremarkableinthewestandnorthpartsofEastChinaSeacoastalwaters(29°30′N,125°E).Thehorizontaldistributionofdietzooplanktondependsontheabundancedistributionofcrustacean.ThedistributionofdietzooplanktonisrelatedtothefishinggroundofEngraulisjaponicusandthehigh-densityareaofyoungfishandlarval.Inspring,thecentralfishinggroundofEngraulisjaponicus(＞100kg/h)andthehigh-densityareaofyoungfishandlarval(＞100individualspernet)arelocatedatthesameplaceofhigh-density(100～250mg/m3)areaofdietzooplanktoninthemiddle-southernpartofEastChinaSeaortheedgeofitswaters.

简介：DescribedisaninitialattempttosimulatethesuspendedsedimentdynamicsrelatingtotidalandwaveforcingduringsummertimeinJune1980andAugust1981fortheYellowandEastChinaSeascontinentalshelf.Thecohesive/non-cohesivesedimentresuspensionandmovementgeneratedbytheinteractionbetweencurrentandwavearemodeledbyuseofECOMSEDandWAMCycle4.ModelresultsarecomparedwithobservationsinUS-ChinaMarineSedimentationDynamicsProgramperformedfor1980-81atofftheChangjiangestuary.Themainfeaturesofsimulationsshowthatsuspendedsedimentconcentrationsduringthesummerdecreasedmarkedlyoffshoreasobservedduringthesimulationperiods.Asforsomediscrepanciesforthemouthoftheestuarywithhighriverdischarges,i.e.,theChangjiangRiver,themodeldidnotproperlyreproducetheover-mixingsituationinthesummer;thusdistinctverticalconcentrationvariationinthislocalregionisnotagreeablewithobservation.However,generaldispersalpatternsofsuspendedsedimentmovementseemtobeagreeablyreproducedforthenearshoreshallowregion.Someoftheproceduresofsimulationandresultsarepresentedanddiscussed.

简介：AstudyoftsunamieventsintheEast(Japan)SeausingcontinuousGalerkinfiniteelementmodel,aimingatreproducingtsunamiwavesgeneratedbyunderwaterearthquakesin1983and1993respectivelyhasbeenperformedfocusingonthegeographicextentofatopographicfeatureintheEast(Japan)Sea.Numericalmodelscanbethepropertoolstostudythecombinedeffectsofrealistictopography.Subsequently,usingtheFEMbasedtwo-dimensionalmodelwehavesimulatedthesmoothedandflattenedtopographiceffectsbyremovalofYamatoRiseandseamountsforthecasesoftthe1983Centralregionearthquaketsunamiandthe1993southwesternHokkaidoearthquaketsunami.TheresultshaveshownthattherewillbehighertsunamisalongtheeasterncoastsofKoreaingeneralexceptsomeareas,likeSokchowithremovaloftopographichighs,thusprovidingcomplicatedbottomtopographyoftheEast(Japan)Seaaseffectivetsunamienergyscattering.

简介：QuantitativedistributionofplanktonicamphipodaintheEastChinaSeaisanalyzedandtherelationwithenvironmentalfactorsandmackerelandscadfishinggroundsisstudied.Theresultshowsthatthecharacteristicofbiomassisgreatseasonalandinterannualvarietyduringthepassingthreedecades.Thedistributionofplanktonicamphipodabasicallyreflectsthemovement,decayandintensificationofthedifferentwatersystemsinthesurveyarea.

简介：Inthispaper,wecalculatedmulti-scaleresidualgeoidanomalieswiththemethodofgeoidseparationprocessing,accordingtoEGM2008ultra-highordergravityfieldmodel,remove-restoretechniqueandStokesintegral.TheEastAsiancontinentalmarginwasselectedasthestudyarea.Theresidualgeoidanomalieshavebeencalculatedbyprogramming.Onthebasisofresidualgeoidanomaliesatvariousorders,theinterlayergeoidanomaliesatdifferentdepthswerecalculatedtodepictthespatialdistributioncharacteristicsoftheresidualgeoid.Finally,weconductedadetailedgeophysicalinterpretationforthestudyareaaccordingtothegeoidanomaliesincombinationwithothergeophysicaldatasets.Fourconclusionscanbeoutlinedasfollows：1）itisimpracticablethatgeoidanomaliesareusedintheinterpretationoftheshallowobjectsduetotheinfluenceoftheterrain;2）theanomaliesofresidualgeoidcanreflecttheintensityofsmall-scalemantleconvectionintheasthenosphere;3）theinterlayergeoidanomaliescanreflectthemagmaticactivitiesassociatedwiththemantleconvectionandmantleplumeindifferentscales;4）thestudyofthegeoidmayprovideanapproachfortheresearchofthesubductionzone,mantleconvectionandmantleplume.

简介：TheavailabledataontidalcurrentsspanningperiodsgreaterthansixmonthsforthecontinentalshelfoftheEastChinaSea(26°30.052′N,122°35.998′E)wereanalyzedusingseveralmethods.TidalCurrentHarmonicAnalysisresultsdemonstratedthatsemi-diurnaltidesdominatedthecurrentmovement.Thetidalcurrentsoftheprincipaldiurnalandsemidiurnalrotatedclockwisewithdepth,withthedeflectionofthemajorsemi-axestotherightintheupperlayerandtotheleftinthelowerlayer.Theverticalstructuresoftwoprincipalsemi-diurnalconstituents-M2andS2-weresimilar,whichindicatesthatthetidalcurrentsaremainlybarotropicinthisarea.Themainfeaturesofthevariationofthefourprincipaltidalconstituentswithdepthdemonstratethatthecurrentsinthisregionareinfluencedbytheupperandlowerboundarylayers.Therefore,thetidalconstituentsoftheshallowwateraresimilar.DifferentverticalmodeswerecalculatedbasedontheEmpiricalOrthogonalFunction(EOF)analysisoftheEasternandNortherncomponentsofthetidalcurrents,withavariancecontributionforthezero-ordermodelofatleast90%.Thevariancecontributionofthebaroclinicmodelisminimal,whichfurtherrevealsastrongbarotropiccharacterforthetidalcurrentsofthisregion.

简介：Byuseofthehydrodynamicmodel,theharmonicconstantsof8principaltidalconstituents(Q_1,O_1,P_1,K_1,N_2,M_2,S_2andK_2)areobtainedfortheEastChinaSea,andtheharmonicconstantofS_aiscalculatedbytwo-dimensionalinterpolation.Thecalculatedresultsagreewellwiththeobserveddataaroundthesea.TheharmonicconstantscanbeusedtopredictthetideintheEastChinaSea.Thecotidalchartsofthe9tidalconstituentsrevealtheirdistribution.

简介：ByusingthedataofSummerandWinter1987,SpringandAutumn1988obtainedbytheR/V"Shijian"duringtheChina-JapanJointResearchProgramonKuroshio,thepapermakesananalysisandresearchonthewatertypedistributionanditsvariationsinthestudiedseaarea.Trieresultsofwhicharemainlyasfollows:(1)TheClassIVmixingwaterwhosepropertyissimilartothatofthecontinentalcoastalwaterislocatedinthenortheastseaarea,alongthecoastofthecontinentinautumnandwinterwhileextendingtotheopenseainspringandsummer.(2)TheboundarybetweentheKuroshiowaterandtheshelfmixingwater(calledtheleftboundaryoftheKroshiowater)isapproximatelylocatedinbetweenthe100mand200misobathsinvariousseasonsandvariouslayers,andmostlynearthe200misobath.IntheseaareanortheastofTaiwan,theKuroshiowateristothewestmostinspringandtheninwinter.Insummer,itistotheeastmostwhile,inautumn,itisinbetweenitspositionsinsummeran

简介：

简介：在19802013期间基于海水平，空气温度，海表面温度(SST)，空气压力和风数据的分析，在华东海(ECS)的沿海的区域的季节的海水平异例的原因被调查。研究结果出现：(1)沿着ECS的沿海的区域的海水平呈现强壮的季节的变化。年度范围是3045厘米，在北方更大比在南方。从北方到南方，海水平的阶段从140变化

简介：BasedonthehistoricalevolutionoftheHangzhouBay,bymakinguseoftheconclusionsmadebythepreviousresearchworkersandtheintegrationofconcretedata,fivedistinctimpactindicatorsofthesedimentfromtheChangjiangEstuaryandtheEastChinaSeatotheHangzhouBayaresummarized.NumericalcalculationandanalysisindicatethatthescouringanddepositionofseabedintheHangzhouBayaresubjecttothedirectimpactoftheevolutionoftheChangjiangEstuary,andthegrowthanddeclineandthedirectionofthesandybaratNanhuizuigivetracestothesedimenttransportbetweentheChangjiangEstuaryandtheHangzhouBay.ThetransportofsedimentfromtheChangjiangEstuarytotheHangzhouBayoccursmainlyinwinterandspringseasonsandtheincreaseoftheChangjiangRiverrunoffandthedecreaseofsedimentchargehavecausedscouringinthenortherncoastoftheHangzhouBayandtheseabederosionalongthefrontalmarginoftheChangjiangRiverDelta.

简介：WesampledthesedimentsoftheEastChinaSeaduring2005and2006,andanalysedthecontentsofthebiogenicmatters:biogenicsilica,organiccarbon,andorganicnitrogen.Fromthesurfacedistributionwefoundthecontentsofthesesubstancestobeintherangesof0.72%-1.64%,0.043%-0.82%,and0.006%-0.11%,respectively.Theirdistributionsweresimilartoeachother,beinghighinsidetheHangzhouBayandlowoutsidethebay.Theverticalvariationsofthecontentswerealsosimilar.Inordertodiscusstherelationbetweenthemweanalysedthevariationsofcontentwithdepth.Theyincreasedinthefirst7cmandthendecreasedwithdepth.Thepeakswerefoundatdepthsbetween20to25cm.Thedistributionofcarbonateshowedanoppositetrendtothatofbiogenicmatters.Thecontentoftotalcarbonwasrelativelystablewithrespecttodepth,andtheratioofhighorganiccarbontocarbonateshowedalowburialefficiencyofcarbonate,whichmeansthatthemainburialofcarbonisorganiccarbon.Inordertodiscussthesourceoforganicmatters,theratiooforganiccarbontoorganicnitrogenwascalculated,whichwas8.01to9.65,indicatingthattheorganicmatterinthesedimentswasderivedmainlyfromphytoplanktonintheseawater.

简介：Thedistributionofthesuspendedsedimentconcentration(SSC)intheBohaiSea,YellowSeaandEastChinaSea(BYECS)isstudiedbasedontheobservedturbiditydataandmodelsimulationresults.Theobservedturbidityresultsshowthat(i)thehighestSSCisfoundinthecoastalareaswhileintheoutershelfseaareasturbidwaterismuchmoredifficulttoobserve,(ii)thesurfacelayerSSCismuchlowerthanthebottomlayerSSCand(iii)thewinterSSCishigherthanthesummerSSC.TheRegionalOceanModelingSystem(ROMS)isusedtosimulatetheSSCdistributionintheBYECS.AcomparisonbetweenthemodeledSSCandtheobservedSSCintheBYECSshowsthatthemodeledSSCcanreproducetheprincipalfeaturesoftheSSCdistributionintheBYECS.Thedynamicmechanismsofthesedimenterosionandtransportprocessesarestudiedbasedonthemodeledresults.ThehorizontaldistributionoftheSSCintheBYECSismainlydeterminedbythecurrent-waveinducedbottomstressandthefine-grainsedimentdistribution.Thecurrent-inducedbottomstressismuchhigherthanthewave-inducedbottomstress,whichmeansthetidalcurrentsplayamoresignificantroleinthesedimentresuspensionthanthewindwaves.TheverticalmixingstrengthisstudiedbasedonthemixedlayerdepthandtheturbulentkineticenergydistributionintheBYECS.Thestrongwintertimeverticalmixing,whichismainlycausedbythestrongwindstressandsurfacecooling,leadstohighsurfacelayerSSCinwinter.HighsurfacelayerSSCinsummerisrestrictedinthecoastalareas.

简介：ThedataofSeaWiFS(Sea-ViewingWideField-of-ViewSensor),installedonSeaStar,hasbeenusedtogenerateSSC(suspendedsedimentconcentration)ofcomplexandturbidcoastalwatersinChina.InviewoftheproblemsoftheSeaDAS(SeaWiFSDataAnalysisSystem)algorithmappliedtoChinacoastalwaters,anewatmosphericcorrectionalgorithmisdiscussed,developed,andusedfortheSSCofEastChinacoastalwaters.Theadvantagesofthenewalgorithmaredescribedthroughthecomparisonoftheresultsfromdifferentalgorithms.

简介：ThepollenanalysisofDGKS9617coreintheEastChinaSea(coveringaboutthelast6800years)showsfiveobviouspollenassemblagesandsevensub-assemblages.Combinedwiththesedimentandtheresultofdiatomanalysis,theclimatechangesarereconstructedduringtheMiddleandLateHolocene.Correspondingtothepollenassemblages,theclimateshiftsjustasfollows:AssemblageⅠ-WarmandDryStage,AssemblageⅡ-CoolandHumidStage,AssemblageⅢ-HotandDryStage(themeanannualtemperatureis2～3℃higherthanthattoday),AssemblageⅣ-CoolandHumidStage,AssemblageⅤ-WannandDryStage.Thethirdstageisdividedintothreesubstagesi.e.aslightcolderanddryone,aslightwannerandhumidoneandaslightwarmeranddryone.Duringthefifthstage,theclimatebecomessimilartothattodaywiththreewarmsubstagesandtwocoolsubstages.

简介：AnestednumericalstormsurgeforecastmodelfortheEastChinaSeaisdeveloped.Aone-wayrelaxingnestmethodisusedtoexchangetheinformationbetweencoarsegridandfinegrid.Intheinnerboundaryofthefinegridmodelatransitionareaissetuptorelaxtheforecastvariables.Thisensuresthattheforecastvariablesofthecoarsemodelmaytransittothoseoffinegridgradually,whichenhancesthemodelstability.Byusingthismodel,anumberofhindcastsandforecastareperformedforsixseverestormsurgescausedbytropicalcyclonesintheEastChinaSea.Theresultsshowgoodagreementwiththeobservations.

简介：根据在2009的冬季和夏天的CTD数据和当模特儿的结果，在西方的华东海架区域的水群众的季节的特征用一个簇分析方法被分析。结果证明在学习区域的水群众的分布和温度咸度特征具有不同季节的差别。在西方的华东海架区域，在冬季期间有三水群众，即，沿海的水(CCW)，台湾温暖的当前的表面水(TWCSW)和混合的黄海浇的大陆人(YSMW)，而是四在夏天期间，即，CCW，TWCSW，台湾温暖的当前的深水(TWCDW)和YSMW。都所有，CCW，TWCSW和TWCDW中是主导的水群众。CCW，首先由低咸度描绘了，在冬季有更低的温度，更高的咸度和更小的空间程度比在里面夏天。TWCSW在比在冬季的夏天更温暖、更新鲜、更小，并且它在冬季期间从台湾海峡水台湾，中国和更少向东北主要从自台湾东面的菲律宾海流向日本的暖流表面水(KSW)发源，但是它在夏天期间由海峡水和KSW组成。TWCDW被低温度和高咸度描绘，并且台湾向东北在自台湾东面的菲律宾海流向日本的暖流表面下的水里完全发源。