摘要
Inthispaper,thenumericalexperimentsontheissueofspin-uptimeforseasonal-scaleregionalclimatemodelingwereconductedwiththenewlyRegionalClimateModel(RegCM3),inthecaseoftheabnormalclimateeventduringthesummerof1998inChina.Totesttheeffectofspin-uptimeontheregionalclimatesimulationresultsforsuchabnormalclimateevent,atotalof11experimentswereperformedwithdifferentspin-uptimefrom10daysto6months,respectively.Thesimulationresultsshowthat,forthemeteorologicalvariablesintheatmosphere,themodelwouldberunningin'climatemode'after4-8-dayspin-uptime,then,itisindependentofthespin-uptimebasically,andthesimulationerrorsaremainlycausedbythemodel'sfailureindescribingtheatmosphericprocessesoverthemodeldomain.Thisverifiesagainthattheregionalclimatemodelingisindeedalateralboundaryconditionproblemasdemonstratedbyearlierresearchwork.Thesimulatedmeanprecipitationrateovereachsubregionisnotsensitivetothespin-uptime,buttheprecipitationscenarioissomewhatdifferentfortheexperimentwithdifferentspin-uptime,whichshowsthatthereexiststheuncertaintyinthesimulationtoprecipitationscenario,andsuchauncertaintyexhibitsmoreovertheareaswhereheavyrainfallhappened.Generally,formonthly-scaleprecipitationsimulation,aspin-uptimeof1monthisenough,whereasaspin-uptimeof2monthsisbetterforseasonal-scaleone.Furthermore,therelationshipbetweentheprecipitationsimulationerrorandtheadvancement/withdrawalofEastAsiansummermonsoonwasanalyzed.Itisfoundthatthevariabilityofcorrelationcoefficientforprecipitationismoresignificantovertheareaswherethesummermonsoonispredominant.Therefore,themodel'scapabilityinreproducingprecipitationfeaturesisrelatedtotheheavyrainfallprocessesassociatedwiththeadvancement/withdrawalofEastAsiansummermonsoon,whichsuggeststhatitisnecessarytodevelopamorereliableparameterizationsch
出版日期
2007年04月14日（中国期刊网平台首次上网日期，不代表论文的发表时间）
