廣州南沙局地環(huán)流和熱力環(huán)境數(shù)值模擬.pdf

1、中山大學(xué)碩士學(xué)位論文廣州南沙局地環(huán)流和熱力環(huán)境數(shù)值模擬姓名：朱建軍申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：氣象學(xué)指導(dǎo)教師：簡(jiǎn)茂球王寶民20080315NumericalSimulationofLocalCirculationandThermalEnvironmentoverNanshaGuangzhouMajor：MeteorologyName：JianjunZhuSupervisor：ProfMaoqiuJianDr。BaominWangAbstra

2、ctUrbanclimaticnumericalmodelsystem，whichiSbasedontheatmosphericdynamicandthermodynamicequations，mayjncludefoMrmodels：mesoscale，localscale，microscaleandhumanbodyscalemodelPekingUniversityModelofAtmosphericEnvironmentfher

3、eafterPU醚A)belongstomesoscalemodel。whicharebroadlyusedforstudyingtheurbanboundarylayerandurbanclimateandenvironment。ThefastdevelopmentwillbeconductedinNanshaDistrict，Guangzhou，thereforethePUMAiSadoptedfortheresearchofcha

4、ngesoflocalcirculationsandthermalenvironments。拍eresultsareasfollowing。ThecharacteristicsofthewindandairtemperaturedenvedfromelevenautomaticweatherstationswereanalyzedTheresultsshowthatthewindfieldsareaffectedbythemonsoon

5、，IOWaltitudeeasterlywindandsea—landbreezelnthetropicaloceanarea下hediurnalevolutionofaveragedwindspeedinautumnandwinterareoppositetospringandsummerThelocalsea—landbreezeScoveredlnthenearlysoutherlywindlnsummerBecausetherm

6、alenvironmentaffectsthelocalwindcirculationthediurnalevolutionofwindspeedlagsbeh]ndtheairtemperature。Theresultsofnumericalsimulationshowthatthehorizontalwindconvergencewilloccurinthedaytimebothinsummerandautumnandthecent

7、erofthisconvergenceSIocatedInthedownwardwinddirections，benefitingtotheformationofverticalwindandcloudandrainHowevertheconvergenceisweaklyinthenighttimeUrbanizationeffectswillgiverisetotheincreasingofairtemperature。lnthes

8、ummerthedailyaveragedtemperaturewouldlncreaseby2。23℃。higherthanthatintheautumn152℃。Inaddition。thistemperatureincreasingindaytime；Shigherthaninnighttime。Winddirectionplaysanlmpo曛antrolelntheformationofpatternofairpollutio

9、ntransformationanddiflusion，decidesthescaleofurbanplumeFurthermore，theatmosphericstabilitywouldaffecttheairpollutiondiffusionandtheatmosphericconditionindaytimeiSbetlerthaninnighttimeKeywords：Localcirculation，Thermalenvi