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：TheEastAsianmonsoonsysteminfluencesthesedimentationandtransportoforganicmatterinEastAsianmarginalseasthatisderivedfrombothterrestrialandmarinesources.Inthisstudy,wedeterminedorganiccarbon（OC）isotopevalues,concentrationsofmarinebiomarkers,andlevelsofOCandtotalnitrogen（TN）incoreYSC-1fromthecentralSouthYellowSea（SYS）.OurobjectivesweretotracethesourcesofOCandvariationsinpalaeoproductivitysincethemiddleHolocene,andtheirrelationshipswiththeEastAsianmonsoonsystem.Therelativecontributionsofterrestrialversusmarineorganicmatterincoresedimentswereestimatedusingatwo-end-membermixingmodelofOCisotopes.ResultsshowthatmarineorganicmatterhasbeenthemainsedimentconstituentsincethemiddleHolocene.Thevariationofterrestrialorganiccarbonconcentration（OCter）issimilartotheEASMhistory.However,thevariationofmarineorganiccarbonconcentration（OCmar）isoppositetothatoftheEASMcurve,suggestingOCmarisdistinctlyinfluencedbyterrestrialmaterialinput.InputsofterrestrialnutrientsintotheSYSoccurintheformoffluvialandaeoliandust,whileconcentrationsofnutrientsinsurfacewaterarederivedmainlyfrombottomwaterviatheYellowSeacirculationsystem,whichiscontrolledbytheEastAsianwintermonsoon（EAWM）.Variationsinpalaeoproductivityrepresentedbymarineorganicmatterandbiomarkerrecordsare,ingeneral,consistentwiththerecentEAWMintensitystudies,thus,comparedwithEASM,EAWMmayplaythemainroletocontrolthemarineproductivityvariationsintheSYS.