臺風(fēng)登陸前后溫度場垂直結(jié)構(gòu)診斷研究.pdf

1、浙江大學(xué)理學(xué)院碩士學(xué)位論文臺風(fēng)登陸前后溫度場垂直結(jié)構(gòu)診斷研究姓名：付駒申請學(xué)位級別：碩士專業(yè)：氣象學(xué)指導(dǎo)教師：譚季青20090510浙江大學(xué)碩十學(xué)位論文臺風(fēng)臀陸前后溫度場垂直結(jié)構(gòu)診斷研究AbstractThetemperatureof18tropicalcycloneswhichlandedinChinaduring2000—2007hasbeenanalyzedusingthedataofNCEPreanalysisandthetyp

2、honealmanac，bythesoftwareofGRADSandSPSSWeespeciallyanalyzedtheverticaltemperaturestructureoffourtropicalcyclonesofMatsa，Kanu，WeipaandHaitangduringthelandfall，anddrawtheconclusionsasfollows：(1)Thesharpoftyphonewarmcoreinv

3、erticallyWasquasi—circularorovalbeforethelandfall，regularandsmooth；afterthetyphonelandfalled，theconstructionofit’SwarlTlcoretransformed—theheightofit’SwarmcoredeclinedandthesharpwasunregularItwasdeducedthatthetropicalcyc

4、lonemaybehastransformed，orsemi—warmandsemicold，orperished(2)ItwasfoundthattheanomalyofthetemperaturereachedmaximumvaluebeforethetyphonelandfalledandgraduallyreducedafterlandfalledTheresultscouldbematchtheindexdataofthety

5、phoonare氆index(3)Theindexdataoftyphoneareainmeridionalandzonaldirectiondecreasedduringthelandfallbefore6hoursandafter6hoursTheindexdataofthetyphonewarmcoreareaindexreducedduetOtheeffectofunderlyingsurface—一f如mtheseasurfa

6、cetolandsurfaceHowevertheindexdatasoffewtyphoneraisedduringthetime，butitrapidlydeclinedafterthatAsawhole，theindexdatasofwarmcoreareareducesduetotheeffectofthetransitionofunderlyingsurface，clodairmassandthereleaseofinnerp

7、otentialheat，butsomestillmaintainsarelativelystablestateandsomerebounds(4)Accordingtothechangeofcompositeindex，wefoundthat：duringthelandfallingtropicalcyclones889％indexdataoftyphoneinwarmcorehasreducedandtheindexdataof55

8、6％typhonereducedatlest50％Betweenthemaxoftypoonwarmingcenterandnearcentralpressureorwindnearcentertyphooncallbereachedto50％withtherelativity；itcanbereachedto444％withtherelativitybetweentheareaindexofthelongitudeorlatitude

9、andnearcentralpressureorwindnearcenter(5)Correlationanalysisofthewarmcoreareaindexwiththestrengthoftropicalcyclonesandthelargestwindnearthecentershowedthat：theintensityreductionoftropicalcycloneshasthestrongcorrelationwi

10、ththereductionofthelargesetwindnearthecenterButthestrengthoftropicalcyclonesandthelargestwindnearthecenterhasthelessrelativitywiththewarmcoreareaindexKeyword：typhoon；temperaturefield；verticalconstruction；warmcore；areaind