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1、ClimateDynamics(2005)24:347–354DOI10.1007/s00382-004-0505-yAndersLevermann?AlexaGrieselMatthiasHofmann?MarisaMontoyaStefanRahmstorfDynamicsealevelchangesfollowingchangesinthethermohalinecirculationReceived:9July2004/Accepted:15November2004/Publishedonline
2、:23February2005óSpringer-Verlag2005AbstractUsingthecoupledclimatemodelCLIMBER-isoftenoverlooked(VellingaandWood,2002;Schwartz3a,weinvestigatechangesinseasurfaceelevationduetoandRandall,2003).aweakeningofthethermohalinecirculation(THC).InPaleoclimaticdatai
3、ndicatethatstrongvariationsofadditiontoaglobalsealevelriseduetoawarmingofthetheTHChaveoccurredinthepast(seereferencesindeepsea,thisleadstoaregionaldynamicsealevel(Clarketal.,2002;Rahmstorf,2002)).Modelsimula-changewhichfollowsquasi-instantaneouslyanychang
4、etionssuggestthatglobalwarmingaccompaniedbyanintheoceancirculation.WeshowthatthemagnitudeofincreasedfreshwaterinputintotheNorthAtlanticcouldthisdynamice?ectcanlocallyreachupto1m,resultinmajorchangesinTHCstrength(ManabeanddependingontheinitialTHCstrength.
5、InsomeregionsStou?er,1993;StockerandSchmittner,1997;Rahm-therateofchangecanbeupto20–25mm/yr.Thestorf,1999;RahmstorfandGanopolski,1999;Woodemergingpatternsarediscussedwithrespecttotheetal.,1999;Schae?eretal.,2002).Recentobservationsoceaniccirculationchange
6、s.Mostprominentisasouth-showanincreaseby7%inriverdischargetotheArcticnorthgradientre?ectingthechangesingeostrophicOcean(Petersonetal.,2002)between1936and1999andsurfacecurrents.Ourresultssuggestthatananalysisofasigni?cantfresheningoftheAtlanticOceanduringt
7、heobservedsealevelchangepatternscouldbeusefulforlast40years(Dicksonetal.,2002;Curryetal.,2003).monitoringtheTHCstrength.Exploringpossibleconsequencesofandindicatorsforthermohalinecirculation(THC)changesishenceofgreatimportance.Here,westudythesealevele?ect
8、sofTHCchangesinaseriesofsimulationswithacoupledclimatemodelthatcontainsanoceancirculationmodel1Introductionwithexplicitcalculationofseasurfaceelevation.ItisusefultodistinguishthreetypesofsealevelSealevelinthenorther
