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《Chinese Journal of Atmospheric Sciences》 2012-01
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Numerical Simulation of the Effect of Heating and Water Vapor on Two Cases of Plateau Vortex

SONG Wenwen1,2,LI Guoping1,2,and TANG Qiankui3 1 College of Atmospheric Sciences and Key Laboratory of Plateau Atmosphere & Environment of Sichuan Province,Chengdu University of Information Technology,Chengdu 610225 2 State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081 3 Chengdu Meteorological Bureau,Chengdu 610071  
By using the satellite Temperature of Brightness Blackbody(TBB) data,NCEP 1°×1° reanalysis data,and nonhydrostatic mesoscale numerical model MM5,control experiment and six sensitivity experiments which are adiabatic,no surface sensible heating,double surface sensible heating,no evaporation effect,no latent heat of condensation,and no water vapor,are performed for two cases of plateau vortex occurring during 28-29 July 2005 and 29-31 July 2009,and the happening,development,and structure change of the plateau vortex during 28-29 July 2005 are mainly discussed.The results show that the vortex center and the vortex structure at 500 hPa simulated in the control experiment are the same as actuality.The adiabatic conditions affect the formation,development and structure change of the vortex most remarkably.The latent heat of condensation and the water vapor do not play decisive roles in formation of the vortex,but play key roles in vortex maintenance and structure characteristics evolvement.Surface latent heat has some effect on the development of the vortex,and no surface latent heat slightly decreases the strength of the vortex.The effect of surface sensible heat on the vortex is different for different cases,and depends on the developing stage of the vortex,and also that the developing stage is daytime or night.
【Fund】: 国家自然科学基金资助项目40875023;; 财政部、科技部公益性行业(气象)科研专项GYHY201006014;; 灾害天气国家重点实验室开放课题重点项目2009LASW-A01
【CateGory Index】: P433
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