简介：Inordertoprovideanoperationalreferencefortropicalcycloneprecipitationforecast,thisstudyinvestigatesthespatialdistributionsofprecipitationassociatedwithlandfallingtropicalcyclones(TCs)affectingChinausingGeostationaryMeteorologicalSatellite5(GMS5)-TBBdataset.AllnamedTCsformedoverthewesternNorthPacificthatmadedirectlandfalloverChinaduringtheperiod2001-2009areincludedinthisstudy.BasedontheGMS5-TBBdata,thispaperrevealsthatingeneraltherearefourtypesofdistributionofprecipitationrelatedtolandfallingTCsaffectingChina.(a)theSouth-WestTypeinwhichthereisaprecipitationmaximumtothesouthwesternquadrantofTC;(b)theSymmetricalSouthTypeinwhichtherainfallismorepronouncedtothesouthsideofTCintheinnercorewhilethereisasymmetricalrainfalldistributionintheouterbandregion;(c)theSouthType,inwhichtherainfallmaximaismorepronouncedtothesouthofTC;and(d)theNorthType,inwhichtherainfallmaximaismorepronouncedtothenorthofTC.AnalysesoftherelationshipbetweenprecipitationdistributionsandintensityoflandfallingTCsshowthatforintensifyingTCs,boththemaximumandthecoverageareaoftheprecipitationinTCsincreasewiththeincreaseofTCintensityovernorthernJiangsuprovinceandsouthernTaiwanStrait,whiledecreasingoverBeibuGulfandtheseaareaofChangjiangRiverestuary.ForallTCs,thecenterofthetorrentialraininTCshiftstowardtheTCcenterastheintensityofTCincreases.Thisfindingisconsistentwithmanypreviousstudies.Thepossibleinfluencesofstormmotionandverticalwindshearontheobservedprecipitationasymmetriesarealsoexamined.Resultsshowthattheenvironmentalverticalwindshearisanimportantfactorcontributingtothelargedownshearrainfallasymmetry,especiallywhenaTCmakeslandfallonthesouthandeastChinacoasts.Theseresultsarealsoconsistentwithpreviousobservationalandnumericalstudies.