简介：Basedonthe1951-2007thunderstormsinJiangsu,astudyisconductedfortheirclimatetrends,periodicity,spatiotemporalpatterns,andthedistributionsofthefirstandlastdaysofthethunderstormsatdifferentguaranteerates(GRs)usingclimatetendencyrate,waveletanalysis,andGRfordiagnosis.Resultssuggestthattheinter-annualnumberofthunderstormdays(TSDs)exhibitsadecreasingtrendinthisprovince.ThetrendisdisplayedmainlyinthedecreasingTSDnumberinsummerandautumnexceptinspring,whenthevariationisnotsignificantinthestudyperiod.Inthisprovince,theTSDnumberdeclinesby～2daysper10years.Onaninter-annualbasis,thepronouncedpositivedeparturesofthenumbertakeplacechieflyintheearly1960s,thelate1960stotheearly-mid-1970s,thelate1980s,andthelate1990scomparedwiththenegativeanomaliesdominantinthelate1970stothemid-1980s,themid-to-late-1990s,andthelate1990sto2007.TherearevastdifferencesintheinitialandendingdaysatdiverseGRsindifferentareasoftheprovince.At50%GR,theearliest(last)daysoccurfrommid-MarchtoearlyApril(earlytolateSeptember)whileat80%GR,theinitial(last)daysarefromlateMarchtoearlyMay(earlytolateOctober).Forthedistributionofperiods,theperiods>8-10yearsarerelativelystablefortheentireprovince.Basedon1951-2007periodanalysis,theregionnorth(south)oftheHuaiheRiverexperiencesTSDsless(more)thannormaldaysinrecentyears.

简介：BystatisticalresearchontheoccurrencepatternofsevereconvectiveweatherinJiangsuprovinceundertheinfluenceoftropicalcycloneswithina10-yearperiod(from2001to2010),thispaperdiscoversthatamongdifferentsevereconvectiveweather,theoccurrencefrequencyofshort-rangeheavyprecipitationisthehighest,thunderstormsandgalescomeinsecond,andgeneralthunderstormsrarelyhappen,whilehailstormsandtornadoesneveroccur.Thestatisticalresultsalsoshowedthatwithintheresearchperiodthereare21tropicalcyclones(TCs)affectingtheJiangsuareaandmostofthemareinthestageofweakeningtotropicaldepressions.Moreover,throughstudyingindicesforrelevantcasesofsevereconvection,itisdiscoveredthattheirthresholdsarelowerthanthatofpreviousresearch,whichindicatedthatconvectiveinstabilityandenergyaccumulationcaneasilyleadtosevereconvectiveweathereventuallyduetotheinfluenceofTCs.