《The Role of the Aerosol Indirect Effect in the Northern Indian Ocean Warming Simulated by CMIP5 Models》.pdf

ATM OSPHERICAND OCEANIC SCIENCE LETTERS，2014，VOL．7，N0．5，411-416 TheRoleoftheAerosolIndirectEffectin theNorthern Indian Ocean W armingSimulatedbyCM IP5M odels HUNing ，LILi．Juan ，andWANGBin’ iStateKeyLaboratoryofNumericalModelingforAtmosphericSciencesandGeophysicalFluidDynamics(LASG)InstituteofAt- mosphericPhvsics．ChineseAcademyofSciences．Beoing100029,China ‘UniversityofChineseAcademyofsciences．Beifing100049．China 。MinistryofEducationKeyLaboratoryforEarthSystemModeling,CenterforEarthSystemScience，TsinghuaUniversity,Beijing 00084,China Received21March2014；revised9April2014；accepted10April2014；published16September2014 Abstract Thenorthem IndianOcean(YIO experienced theNorthPacinc storm trackandNorthAtlanticstomr adecadal—scalepersistentwarming from 1950to 2000． tracktoshift northward．andforcetheannulartrend in whichhasinfluencedbothregionaland globalclimate． both hemispheresthrough interactionsbetween forced BecausetheN10 isaregionsusceptibletoaerosolsemis． stationary waveanomaliesandtransienteddiesfLieta1． sionchanges．andtherearestilllargeuncertaintiesinthe 2010b；Chueta1．．2013、． representation ofthe aerosolindirecteffectfAIE)in Theattributionofthisbasin．．wideIndianOceanwarm．． CMIP5(CoupledModelIntercomparisonProjectPhase51 ing hasbeen investigated in severalstudies．Through models．itisnecessarytoinvestigatetheroleoftheAIEin analyzingtheCoupledModelIntercomparisonProject the NIO warming simulated by these models．In this Phase5(CMIP5)models．DongandZhou(20141sug． sfudv．theauthorsselectsevenCM IP5modelswithboth gestedthattheIndianOceanSSTwamr ingisthecompet． theaerosoldirectand indirecteffectsto investigatetheir ing resultofthewarming effectofGHGsfGreenhouse perfomr ancein simulating thebasin．widedecadal—scale Gases)withthecoolingefrectofaerosols．Bametteta1． NIO warming．Theresultsshow thatthedecreasingtrend (2005)alsopointedoutthatthesurfaceheatbudgetover ofthedownwellingshortwaveflux(FSDS)atthesurface theIndian Oceanistheresulto