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1019998QUARTERLYJOURNALOFAPPLIEDMETEOROLOGYVol.10,SupplementAugust1999X(,100080)IEAP,.,.:,ChangmaBaiu.,.,[1].,,.[13],.,.,(69),,,;,,.,;,.,,.,.[112],,,1.,,,WebsterLau,..,X962908201201.1998212210,1999201215.©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.(1908),(1953),(1957)(1962),(1971)Webster(1992)Lau(1998)(1994),(1995)(1983),(1996)(1998)(1987)OLRMurakami(1994)Hse(1944)1,.,,,,.,,..90,,.,.,(68),.[13,14],2(EAP).[15],,.1EAP,EAP,IEAP[15](EAP),.IEAP:IEAP=Nor(-0.25ZS(20N125E)+0.50ZS(40N125E)-0.25ZS(60N125E))(1)ZS=Zsin45ösinU,Z=Z-Z(Z500hPa,Z),U,Nor(X)X.,.IEAP(IEAP1),;IEAP(IEAP-1),.2610©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.2NCARöNCEP(19581997),160(19511996)14(19531994)36(19511986)50(19461996).,(2933N114125E).3(1)2,2219461996IEAP3IEAP(19461996)(19511996)(IEAP,:).IEAP,1954,1969,1980,1983,1986,1987,1991,1993,IEAP-1;1994,1978,1975,1972,1961,,IEAP1.(1)IEAPIEAP,(),3,IEAP[15].IEAP,;IEAP,.IEAP36:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.-0.59,.,IEAP,(),0.53,0101.(2)IEAP14(19531994),IEAP,4aIEAP,4bIEAP,IEAP,-0137,0105,,,.IEAP,,0.77,.,IEAP.4IEAP(19461996)(19511986)(a)(19531994)(b)(:IEAP,(a):,(b):)5IEAP(a)(b)(:IEAP,(a):,(b):)(3)IEAPIEAP,1951198636(),19461996,50.5a,bIEAP(a)(b),,IEAP,.0101.4610©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,IEAP,,2.IEAP,,,IEAP,,.6IEAP500hPa(a)IEAP(b)IEAP(:gpm)4(1)IEAP,[15]IEAP.IEAPIEAP1,IEAPIEAP-1.656:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.IEAP500hPaIEAP.IEAP,,,,,IEAP,,,.(),IEAP().7IEAP(a)IEAP(b)IEAP(:mös)(2)7,100160E.:IEAPIEAP,,,,,300hPa200hPa.6610©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.,,.8,100160E,,IEAPIEAP8IEAP(a)IEAP(b)IEAP(:C).,200hPa,200hPa,,,,300hPa200hPa.,.100hPa.,,,.100hPa,,400hPa200hPa.76:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.5(1)EAP(-),.IEAP,,,;IEAP,,,.(2)IEAP,.:,,.1,,..,1999,23(2):129141.2,,,..:,1991.192244.3,..:,1996.6193.4RamageCS..:.:,1978.350.5ChangCP,KrishnamntiTN.MonsoonMeteorology.NewYork:OxfordUniversityPress,1987.6093.6..,1983,38(3):207217.7WebsterPJandYangS.MonsoonandENSO:Selectivelyinteractivesystem.Quart.J.R.Meteor.Soc.,1992,118:877926.8ZengQC,ZhangBL,LiangYL,etal.EastAsiansummermonsoon2acasestudy.Proc.IndianNatri.Sci.Acad1994,A60(1):8196.9MurakamiT,MatsumotoJ.SummermonsoonovertheAsiancontinentandwesternNorthPacific.J.Meteor.Soc.Japan,1994,10:719745.10,..,1944,18:8192.11HuangGangandYanZhongwei.EastAsiansummermonsooncirculationanomalyindexandinterannualvaria2tions.InternationalConferenceonMonsoonandHydrologicCycle,Korea,Kyongju,2225April,1998.236241.12,,,..,1998,22(4):460470.13HuangRHandSunFY.ImpactsofthetropicalwesternPacificontheEastAsiansummermonsoon.J.Meteor.Soc.Japan,1992,72(6):937957.14HuangRH.TheEastAsiaöPacificpatternteleconnectionofsummercirculationandclimateanomalyinEastAsi2a.ActaMeteorologicaSinica,1992,6(1):2536.15,..,1994,44(4):421424.8610©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.STUDYONTHERELATIONSHIPBETWEENSUMMERMONSOONCIRCULATIONANOMALYINDEXANDTHECLIMATICVARIATIONSINEASTASIAHuangGang(InstituteofAtmosphericPhysics,CAS,Beijing100080)AbstractBasedontheEastAsianSummerMonsoonCirculationAnomalyindexpresentedpreviouslybytheauthor,thefurtherexaminationontheabilityofdescriptiononthesummerclimaticvariationinEastAsiaiscarriedout,andtherelationshipsbetweentheindexandtheclimaticelementvariationsinChina,JapanandKoreaarealsostudied.Theresultsshowthattheindexcouldwelldescribethevariationsofsummerclimaticanoma2lyinEastAsia.Keywords:EastAsiansummermonsooncirculationanomalyindexAtmospherictele2connectionInterannualchangeDroughtöflood96:©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.