49966.雙眼墻臺風(fēng)wilma的數(shù)值模擬及分析

1、南京信息工程大學(xué)碩士學(xué)位論文雙眼墻臺風(fēng)Wilma的數(shù)值模擬及分析姓名：王國榮申請學(xué)位級別：碩士專業(yè)：氣象學(xué)指導(dǎo)教師：羅哲賢20070501摘要AbstractInthisstudy，ahighresolutionexplicitsimulationofHurricaneWilmaisperformedusingtheWeatherResearchandForecasting(WRF)modelingsystemTheconcentric

2、eyewallsanditseyewallreplacementprocessaresimulatedSuccessfullyonthebaseofmodelresults，theeffectofenvironmentalverticalshearonhurricane’SintensityandstructurewasanalyzedfirstThenadetailedinvestigateoftheeye，innereyewall，

3、Outereyewallandmoatregionisperformedweshowhighlightingontheanalysisoneyewallvortices，doubleeyewalls，charactersofmoatandtheeyewallcyclesandtrytoexplainouteyewall’SformationbytheevolutionofPVanomalyFinally，weputaseriesoftr

4、ajectoriesindifferentregionofhurricanetOhavealookattheinteractionbetweenthesedifferentregiOIlSandtoanalyzethepossiblemechanismofformationofoutereyewallTheanalysisshows：theverticalshearhasnotableeffectonWilmasstmet—urebot

5、hthevigorousconvectionandlargeradialoutfowarelocatedatthedownshearanddownshearleftthereareseveraleyewallvorticesinWilmaseywalltheseeyewallvorticeswillrotatearoundthecenterofhurricaneanticlockwiseandcreatelocalradialinfow

6、andoutfowintheeyewallThemaximumverticalvelocityandmaximumheatingjusttotheinsideradiallyofthemaximumwindsmaybethemainreasonoftheeyewall’ScontractsMoatregionischaracterizedbyintenserotationdifferentialandweakupweH，whereast

7、hereissubsidencebetween3—5kinlevelsOutereyewall’SformationmayberelatedtothedownwardtransportofmiddlePVThedownwardcurvedofabsoluteangularmomentumfavorforthedownwardtransportofmiddlePVanomaly，whichwillconvergetohurricanece

8、nterintheinfowlayersubsequentlyThePVanomalytransportinginwardwillstackataradiusandintensify，theninducetheWISHEmechanismtostrengthenandultimatelycreatetheoutereyewallThustheouterEyewall’Slocationsmaydeterminedbythepositio