Research on the Interannual Variability of the Great Whirl and the Related Mechanisms-中国Betway体育网页登陆

摘要 BasedonAVISO(archiving,validationandinterpretationofsatellitedatainoceanography)datafrom1993to2010,QuikSCAT(QuickScatterometer)datafrom2000to2008,andArgodatafrom2003to2008,theinterannualvariabilityoftheGreatWhirl(GW)andrelatedmechanismsarestudied.ItshowsthattheoriginandterminationtimesoftheGW,aswellasitslocationandintensity,havesignificantinterannualvariability.TheGWappearedearliest(latest)in2004(2008)andvanishedearliest(latest)in2006(2001),withtheshortest(longest)durationin2008(2001).Itscenterwasmostsouthward(northward)in2007(1995),whiletheminimum(maximum)amplitudeandareaoccurredin2003and2002(1997and2007),respectively.TheGWwasweakeranddisappearedearlierwithitslocationtendingtobeinthesouthwestin2003,whilein2005itwasstronger,vanishedlaterandtendedtobeinnortheast.TheabnormalyearswereoftennotthesameamongdifferentcharactersoftheGW,andwerenotallcoincidentwithENSO(ElNi?o-SouthernOscillation)orIOD(IndianOceanDipole)events,indicatingtheverycomplexnatureofGWvariations.MechanisminvestigationsshowsthattheinterannualvariabilityofintraseasonalwindstresscurlinGWregionresultsinthatoftheGW.ThegenerationoftheGWiscoincidentwiththearrivalofRossbywavesattheSomalicoastinspring;theintensityoftheGWisalsoinfluencedbyRossbywaves.TheterminationoftheGWcorrespondswelltothesecondoneofthetoptwopeaksinthebaroclinicenergyconversionrateinGWregion,andtheintensityandthepositionoftheGWarealsocloselyrelatedtothetoptwobaroclinicenergyconversionrates.

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Research on the Interannual Variability of the Great Whirl and the Related Mechanisms

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