| 非均匀饱和广义湿位涡在暴雨分析与预测中的应用 |
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| 引用本文： | 周玉淑,曹洁,王东海.非均匀饱和广义湿位涡在暴雨分析与预测中的应用[J].应用气象学报,2007,18(6):754-759. |
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| 作者姓名： | 周玉淑 曹洁 王东海 |
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| 作者单位： | 1.中国科学院大气物理研究所云降水物理与强风暴实验室, 北京 100029 |
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| 基金项目： | 中国科学院资助项目;中国气象科学研究院灾害天气国家重点实验室开放课题;国家自然科学基金 |
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| 摘 要： | 考虑实际大气非均匀饱和特性, 通过引入广义位温及广义湿位涡方程, 对华北暴雨和江淮梅雨锋暴雨的发生及落区进行了广义湿位涡异常的诊断分析, 表明暴雨形成时大气低层有广义湿位涡的异常出现。对广义湿位涡倾向的计算表明:它对暴雨的发生有一定指示作用, 因而可利用广义湿位涡的异常来识别暴雨的出现。
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| 关 键 词： | 非均匀饱和 广义湿位涡 暴雨 |
| 收稿时间： | 2007-03-30 |
| 修稿时间： | 2007-07-11 |
Application of Generalized Moist Potential Vorticity in Non-uniformly Saturated Atmosphere to Torrential Rain Forecast |
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| Zhou Yushu,Cao Jie,Wang Donghai.Application of Generalized Moist Potential Vorticity in Non-uniformly Saturated Atmosphere to Torrential Rain Forecast[J].Quarterly Journal of Applied Meteorology,2007,18(6):754-759. |
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| Authors: | Zhou Yushu Cao Jie Wang Donghai |
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| Affiliation: | 1.Laboratory of Cloud-precipitation Physics and Severe Storms, Institute of Atmospheric Physics, CAS, Beijing 1000292.State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 1000813.Graduate School, CAS, Beijing 100049 |
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| Abstract: | The introduction of generalized potential temperature and tendency equation of generalized moist potential vorticity into the thermodynamic framework is based on the non-uniform saturation of real atmosphere.The generalized moist potential vorticity(GMPV) equation is deduced by absorbing the generalized potential temperature.The water vapor and its gradient effect can be manifested in the GMPV equation,which indicates the convergence mechanism of water vapor at lower levels when torrential rain occurs.The GMPV anomaly is used in diagnostic studies of torrential rain both in North China and Yangtze River Basin.The results show that dynamic identification and forecasting of torrential rain from the perspective of generalized moist potential vorticity and its anomaly are effective,which maybe provide a new thought for the operational application of the GMPV. |
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| Keywords: | non-uniform saturation generalized moist potential vorticity torrential rain |
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