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《Chinese Journal of Atmospheric Sciences》 2007-06
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Diagnostic Analysis of Generalized Moist Potential Vorticity and Forecast of Torrential Rain Region

DUAN Ting-Yang1,DENG Guo2,and WANG Dong-Hai31 Chengdu University of Information Technology,Chengdu 6102252 National Meteorological Center,Beijing 1000293 State Key Laboratory of Severe Weather,Chinese Academy of Meteorological Sciences,Beijing 100081  
The authors discussed the possible application of generalized moist potential vorticity(GMPV) in non-uniformly saturated atmosphere and its tendency to location of torrential rain,which maybe provide a new thought for the operational application of the GMPV.The calculated results manifest that the GMPV is not a conservational variable,but it can reflects the non-uniformly saturated property in real atmosphere.Especially,the water vapor and its gradient effect can be manifested in the GMPV,which can indicate that the convergence mechanism of water vapor at lower levels and can reflect the characteristic and mechanism of high water vapor convergence when torrential rain occurs,and it would be used more widely to diagnose the structure and location of torrential rain systems in the future.
【Fund】: 国家自然科学基金资助项目40505009;; 灾害天气国家重点实验室2006年开放课题2006LASW05;; 中国气象局武汉暴雨研究所暴雨开放基金项目IHR2006K01;; 中国科学院方向性项目KZCX3-SW-225
【CateGory Index】: P457.6
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