近五十年亚洲地面气温变化趋势与突变的时空分布-(6194)

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1、TheSpatialandTemporalDistributionofAbruptChangeandTrendofSurfaceTemperatureinAsiainNearlyFiveDecadesAbstractBasedontheairtemperaturedatasetsfrom2467observationstationsinChinaandglobalmonthlyairtemperaturefromNationalClimateDataCenter(NCDC),thedatasetsinAsiaareinterpolat

2、edandrizedbyinversedistanceweightingmethod.Thesensitivityexperimentofobservationdensityisconductedontotemperatureabruptchange.Theresultsshowthatatleast33observationstationsareneededfortheanalysisrequestforChina.Therefore,only132stationsarerequiredfortheanalysisofthetemp

3、eratureabruptchangeforAsia.AcrosscheckisimposedontotheinterpolateddatainAsia.Therearesmalldeviationsbetweentheestimatedvalueandrealvalue,whichindicatestheestimatedvaluecanbeappliedtotheanalysisofairtemperaturetrendandabruptchangeinAsia.Usingtherasterizeddataandreanalysi

4、sdatafromNationalCentersforEnvironmentalPrediction-NationalCenterforAtmosphericResearch(NCEP/NCAR),theabruptchangeoftemperatureduring1961-2011overChinaandEastAsiawasanalyzedbyshowingitsspatialandtemporaldistribution.Finally,thepossiblefactorsresponsiblefortheabruptchang

5、eregimeoftemperatureoverEastAsiawerediscussed.Themainconclusionsarelistedfollowing:(1)TheabruptchangemodeoftheannualmeantemperatureoverChinaiswellcorrelatedwiththelatitude.Theabruptwarminghappenedearlierbothpolewardandequatorwardof35°N.Meanwhile,theabruptchangeadvancedf

6、romcoasttoinland.Thespatialandtemporaldistributionoftheabruptchangeofthemaximumtemperaturewassimilartothatofthemeantemperature,whiletheabruptchangeoftheminimumtemperaturewasahead.TheabruptchangeofthetemperaturechangeoverTibetanPlateauwasalwayslaterthanthatofmostpartsofC

7、hina.(2)TheabruptchangemodeoftheseasonalmeantemperatureoverChinashowsobviousseasonaldiversity.Differencesaremostevidentbetweenwinterandsummer.Inwinter,theairtemperatureadvancesfromnorthtosouth.Theregionaloflatestabruptchangetakesplaceintheeastoftheplateau,andthetimefora

8、bruptchangeadvancesfromcoasttoinland.Incontrast,forsummerChinaisdividedintosoutheastpartandnorthwestpartduetot