| 非均匀饱和大气中的广义位温 |
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| 引用本文： | 曹洁, 高守亭. 非均匀饱和大气中的广义位温[J]. 地球物理学报, 2008, 51(6): 1651-1656, |
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| 作者姓名： | 曹洁 高守亭 |
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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(LACS),北京 100029; 2 中国科学院研究生院,北京 100049 |
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| 基金项目： | 国家自然科学基金重点项目 ， 中国科学院海外杰出学者基金 |
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| 摘 要： | 从热力学第一定律出发证明了广义位温的物理基础及其守恒性，完善了Gao等在2004年提出的非均匀饱和大气动力学的理论基础.探讨了广义湿位涡理论及其倾向方程在地面气旋追踪、雾区预报等方面的可应用性，为湿空气动力学的理论研究和业务应用提供了新思路.结果表明，非均匀饱和大气中的广义位温和位温、相当位温一样，具有守恒性；但由于其体现了实际大气的非均匀饱和特性，比位温、相当位温具有更广泛的应用前景.
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| 关 键 词： | 广义位温 非均匀饱和 湿空气动力学 |
| 收稿时间： | 2007-03-19 |
| 修稿时间： | 2008-07-03 |
Generalized potential temperature in non-uniformly saturated atmosphere |
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| CAO Jie, GAO Shou-Ting. Generalized potential temperature in non-uniformly saturated atmosphere[J]. Chinese Journal of Geophysics (in Chinese), 2008, 51(6): 1651-1656, |
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| Authors: | CAO Jie GAO Shou-Ting |
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| Affiliation: | 1 Laboratory of Cloud-precipitation Physics and Severe Storms (LACS), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; 2 Graduate School of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | This paper deduces the physical explanation and the conservation property of generalized potential temperature θ* based on the First Law of Thermodynamics, in order to make clear of the physical basis of moist dynamics of non-uniformly saturated atmosphere. The results show that the generalized potential temperature has the same conservation property as potential temperature and equivalent potential temperature but represent the real non-uniformly saturated atmosphere better. As an application of θ*, the generalized moist potential vorticity and its tendency equation has been tested theoretically on new applications. |
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| Keywords: | Generalized potential temperature Non-uniform saturation Moist dynamics |
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