摘要
Anobjectiveanalysisoftropicalcyclonetracksisperformed,withwhichthetracksof131tropicalstorms(TSs)in1972-2011areseparatedintothreetypesthatmovewest-,north-andnorthwestward,denotedasTypesA,BandC,respectively.TypeA(21TSsand16%oftotal)hastheorigininthesouthwesternBayofBengal,withtheTSinaunimodaldistributionasitsseasonalfeature,occurringmainlyinautumn;18ofthe21TSs(takingup90%)landmostlyonthewesternBaycoast(westof85°E);5%ofType-ATSsattainsthewindspeedof>42.7to48.9m/s.TypeAhaslittleornoeffectonTibet.TypeB(74TSs,56.6%ofthetotal)hasitspreferableorigininthecentralBayofBengal,withtheTSinabimodaldistributionasitsseasonalpattern.Thistypedenotesthetravelinthenorthinspring,withthelandfallof67ofthe74TSs(accountingfor91%)mainlyonthemiddlecoastoftheBay(85°to95°E),and19%oftheTSsreachingthewindvelocityof>42.7to48.9m/s,whichexertgreateffectonTibetanditisthisTStrackthatgivesstrongprecipitationonitswaythroughthisregion.TypeC(36TSs,27.5%ofthetotal)hasitsmainorigininthesouthernpartofthebay,andtheseTSsareformedlargelyinautumn,movinginthenorthwestdirection,and23ofthe36TSs(64%)landmostlyonthewesternBaycoast,lastingforalongertime,withalmostnoimpactuponTibet.
出版日期
2015年03月13日（中国期刊网平台首次上网日期，不代表论文的发表时间）
