不同初始渦廓線對渦旋自組織影響的初步研究及敏感性試驗(yàn).pdf

1、南京信息工程大學(xué)碩士學(xué)位論文不同初始渦廓線對渦旋自組織影響的初步研究及敏感性試驗(yàn)姓名：曾鵬申請學(xué)位級(jí)別：碩士專業(yè)：氣象學(xué)指導(dǎo)教師：羅哲賢20070501AbstractWithintheframeworkofvorticesselforganizationdynamics，theeffectofdifferentvorticesprofileinteractionswaspreliminarilyinvestigatedInthefir

2、stplace，themechanismoftwinvorticesprofileandterraininteractionsonvorticesselforganizationwasnumericallystudiedbasedonaB—plane2Dquasi—geostrophicbarotropicalmodelwiththetopo口aphictermandtheselforganizations’characteristic

3、ofdifferenttwin—vorticesformingintoasinglevortexwascontrastedTheresultsshowedthatthevorticeswithGauses，doublelogarithm，doublesine，parabolaandcondensationprofilecouldmergeintoamesodscalevortexduetotheimpactofterrainDiffer

4、entinitialvortexprofilescouldinfluencetheprocessofselforganization，suchasitsspeedThespiralbandsappearedearlierandthemergeprocesswasfaster、析thDoublesineandparabolavortexprofileOntheotherhand，althoughthespiralbandofcondens

5、ationvortexprofileappearedearlyaswell，itspentmoretimetomergeintoasinglevortexThedifferentinitialvortexprofilecouldaffecttheattributeofquasi—terminativevortex，includingtheextentofaxisymmetric，complexityandtheshapeofwindpr

6、ofileInaddition，theexperimentoftwinvortexinteractionwithdifferentintensitiesandtheterrain’ssensitivitytestwerecarriedouttoexploretheinfluenceofterrainandthevariabilityofvortexintensityontwin—vortexselforganizationprocess

7、Theresultssuggestedthatdiverseterrainscalecouldimpactthevelocityoftwin—vortexrotationwithGausesprofileobviouslywhilethechangeofterrainheightcouldinfluencethelocationofquasiterminativevortexWhentheinitialdistributionsofin

8、tensityaredifferent，theselforganizationprocessesaredissimilarlybecauseoftheinteractionbetweentwin—vortexandnegativeVortexoverterrainFortheinitialdistributionofeasternstrongervortexandwesternweakervortex，theweakervorteKwi

9、llmergeintothestrongerone，asfortheinitialdistributionofeasternweakervortexandwesternstrongervortex，theweakervortexwouldnotmergeintothestrongeronecompletel)；somepartoftheweakervortexwillmovetothenorthofterrainandfoFininto