《Relationships between Interannual and Intraseasonal Variations of the Asian-Western Pacific Summer Monsoon Hindcasted by BCC_CSM1.1（m）》.pdf

ADVANCESINATM OSPHERICSCIENCES，VOL．31，SEPTEMBER2014，1051-1064 RelationshipsbetweenInterannualandIntraseasonalVariationsof theAsian-WesternPacificSummerMonsoonHindcasted byBCC—CSM1．1(m) LIUXiangwen ，WUTongwen，YANGSong，LIQiaoping，CHENGYanjie， LIANGXiaoyun，FANGYongjie，JIEWeihua，andNIESuping NationalClimateCente~ChinaMeteorologicalAdministration，Beifing100081 DepartmentofAtmosphericSciences，SunYatsenUniversity,Guangzhou510275 (Received9October2013；revised6January2014；accepted24Februray2014) ABSTRACT UsinghindcastsoftheBeijingClimateCenterClimateSystemMode1．therelationshipsbetweeninterannualvariability (IAV)andintraseasonalvariability(ISV)oftheAsian-westernPacificsummermonsoonarediagnosed．Predictionsshow reasonableski11withrespecttosomebasicchraacteristicsoftheISV andIAV ofthewesternNorthPacificsummermonsoon (WNPSM)andtheIndiansummermonsoon(isM)．However,thelinksbetweentheseasonallyaveragedISVfSAISV)and seasonalmeanofISM areoverestimatedbythemode1．Thisdeficiencymaybepartiallyattributabletotheoverestimated rfequencyoflongbreaksandunderestimatedrfequencyoflongactivespellsofISV innormalISM years ． althoughthemodel iscapableofcapturingtheimpactofISV ontheseasonalmeanbyitsshiftinhteprobabilityofphases ． Furthermore，theinterannualrelationshipsofseasonalmena，SA1SV and seasonally averaged1ong—wavevariability (SALWV；i．e．，thepratwithperiodslongerthantheintraseasonalscale)oftheWNPSM nadISM withSSTa