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1、EarthandPlanetaryScienceLetters233(2005)71–86www.elsevier.com/locate/epslAhigh-resolution,absolute-datedHoloceneanddeglacialAsianmonsoonrecordfromDonggeCave,ChinaCarolynA.Dykoskia,*,R.LawrenceEdwardsa,HaiChenga,DaoxianYuanb,cbbbYanjunCai,MeiliangZhang,YushiLin,JiamingQing,caZhishengAn,JustinRevena
2、ughaDepartmentofGeologyandGeophysics,UniversityofMinnesota,MN55455,USAbKarstDynamicLaboratory,TheMinistryofLandResources,40Qixingroad,Guilin541004,ChinacStateKeyLabofLoessandQuaternaryGeology,InstituteofEarthEnvironment,ChineseAcademyofSciences,Xi’an,710075,ChinaReceived24May2004;receivedinrevised
3、form20January2005;accepted25January2005Availableonline23March2005Editor:E.BoyleAbstract18WepresentacontinuousrecordoftheAsianmonsoonoverthelast16kafromyOmeasurementsofstalagmitecalcite.Over900oxygenisotopicmeasurementsprovidinginformationonshiftsinmonsoonprecipitationarecombinedwitha23018chronolog
4、yfrom45preciseThdates.yOandthereforeAsianmonsoonintensitygenerallyfollowschangesininsolation,18althoughchangesinyOaregenerallyaccommodatedinabruptshiftsincontrasttosmoothlyvaryinginsolation,indicatingthat18thresholdeffectsmaybeimportant.yOdecreaseddramatically(~3x)atthestartoftheHolocene(~11.5ka)a
5、ndremained18lowfor~6ka.FourpositiveyOeventscenteredat11225F97yrBP(1.05x),10880F117yrBP(1.15x),9165F75yrBP(1.4x),andadoubleeventcenteredat8260F64yrBP(1.1x)and8080F74yrBP(1.0x)punctuatedthisperiodofhighmonsoonintensity.AllfoureventscorrelatewithinerrorwithclimatechangesinGreenlandicecores.Thus,there
6、lationshipbetweentheAsianmonsoonandtheNorthAtlanticobservedduringtheglacialperiodappearstocontinueintotheearlyHolocene.Inaddition,threeofthefoureventscorrelatewithinerrorwithoutbursteventsfromLakeAgassiz.Thedeclineof18monsoonintensityinthemid-lateHoloceneischaracterizedbyanabruptpositiveshiftinyOw
7、hichoccursat3550F59yrBP(1.1xin~100yr).Inaddition,theHoloceneispunctuatedbynumerouscentennial-andmulti-decadal-scaleevents(amplitudes0.5to1x)uptohalftheamplitudeoftheglacialinterstadialeventsseeninthelastglacialpe
