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1、!"#$%&(ChineseJournalofAgrometeorology)2010,31(4):507-511doi:10.3969/j.issn.1000-6362.2010.04.004±23N′ZLopGμ?·?1g3NoxyO~1,2111@CDE,.FG,HI,JK(1/?%H!?,±230031;2/?%&§,±230061)56:?/?1961-2009μ6-8?>vw,è?>J!`J!?¢?@Z`I?à,?ì'?μ`??μMJ!~uú。t:>J!(PCD)`J!<(PCP)?Cz
2、9>9b?¢5?M?·°?。/?o<>J!`J!??Uì??,^?2ü>;7??y{ì
3、。789:>J!;?¢?@;o<;/?SpatialtemporalDistributionofPrecipitationinAnhuiP
4、rovinceduringMainFloodSeasonBasedonPrecipitationConcentrationDegree12111WANGSheng,SHILei,XIEWusan,CHENGZhi,DAIJuan(1AnhuiClimateCenter,Hefei230031,China;2AnhuiMeteorologicalBureau,Hefei230061)Abstract:BasedontheprecipitationdatafromJunetoAugustofAnhuiprovinced
5、uring1961-2009,thespatialtemporaldistributionandvariationofprecipitationwereanalyzedbyusingthePrecipitationConcentrationDegree(PCD)andPrecipitationConcentrationPeriod(PCP)inmainfloodseason,andthePCDwerecomparedbetweenmoreprecipitationyearandlessprecipitationye
6、ar.TheresultsshowedthatthePCDandPCPcouldquantitativelyrepresentthenonuniformitypropertiesoftheprecipitationspatialtemporaldistribution.ThespatialdistributionincreasingtrendofPCDandPCPwereobviousfromsouthtonorthoverAnhuiprovinceduringmainfloodseason;theinterann
7、ualandinterdecadalvariationsofPCDandPCPwereobvious.EOFanalysisshowedthattheratioofthefrontthreeeigenvectorswithtotalsquareerrorwas57%.ThefirsteigenvectorrepresentedtheconformityPCDvariationoverAnhuiprovince,thesecondeigenvectorrepresentedthereversePCDvariationb
8、etweenthesouthandnorth,andthethirdeigenvectorshowedthatthereversePCDvariationbetweensouthnorthandthecentralregion.ThesyntheticanalysisshowedthatthePCDinmoreprecipitationyearswasgreaterthanthatinlessprecipitationyears,andthePCPwassmallerthaninthelessprecipitation
9、years.ThegravityofprecipitationanditscorrespondingperiodscouldbeextractedbyusingthePCDandPCPmethod,whichcouldprovidedthebasisfortheformationmechanismofextremep