A STUDY ON THE APPLICATION OF FY-2E CLOUD DRIFT WIND HEIGHT REASSIGNMENT IN NUMERICAL FORECAST OF TYPHOON CHANTHU（1003） TRACK-中国期刊网

摘要 Inthispaper,wefirstanalyzedclouddriftwind(CDW)datadistributionintheverticaldirection,andthenreassignedtheheightofeveryCDWintheresearchdomainintermsofbackgroundinformation,andfinally,conductedcontrastnumericalexperimentsofassimilatingtheCDWdatabeforeandafterreassignmenttoexaminetheimpactsontheforecastofthetrackofTyphoonChanthu(1003)from00:00(CoordinatedUniversalTime)21Julyto00:00UTC23July,2010.TheanalysisresultsoftheCDWdataindicatethatthenumberofCDWsismainlydistributedinthemidandupper-troposphereabove500hPa,withthemaximumnumberatabout300hPa.Theheightreassigningmethodmentionedinthisworkmayupdatetheheighteffectively,andtheCDWdataaredistributedreasonablyandnoobviouscontradictionoccursinthehorizontaldirectionafterheightreassignment.Afterassimilatingtheheight-reassignedCDWdata,especiallythewatervaporCDWdata,theinitialwindfieldaroundTyphoonChanthu(1003)becamemorereasonable,andthenthesteeringcurrentleadingthetyphoontomovetothecorrectlocationbecamestronger.Asaresult,thenumericaltrackpredictionsareimproved.

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A STUDY ON THE APPLICATION OF FY-2E CLOUD DRIFT WIND HEIGHT REASSIGNMENT IN NUMERICAL FORECAST OF TYPHOON CHANTHU（1003） TRACK

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A STUDY ON THE APPLICATION OF FY-2E CLOUD DRIFT WIND HEIGHT REASSIGNMENT IN NUMERICAL FORECAST OF TYPHOON CHANTHU（1003） TRACK

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