Dynamic Meteorology

Lindzen博士继续研究与平衡在大气动力学中的作用有关的一些主题。 两个广泛的领域是：（1）位涡混合及其对大气结构的影响，以及行星尺度斜压不稳定增长率的降低;（2）涡度拟能收支及其在限制强迫Rossby波振幅方面的作用。 这两个专题对于了解热带外和热带大气结构的动力学以及发展基于物理的气候模式的关键组成部分都很重要。 特别令人感兴趣的应该是一项观测分析，研究与厄尔尼诺现象有关的海面温度变化与哈德利环流强度变化之间的关系。 此外，林德森博士将继续研究一般的稳态罗斯比波，包括它们与冰盖的相互作用。 他将研究冰盖对罗斯贝波形成的贡献，以及它们对冰盖发展和消融的影响。 这不仅在其应用于当今冰盖方面很重要，而且可能有助于了解冰河时代的冰川和冰川消退。气候动力学和大规模动力气象学方案共同为这一项目提供支助。

Dr. Lindzen continues to investigate a number of topics related to the role of equilibration in atmospheric dynamics. The two broad areas of interest are: (1) potential vorticity mixing and its implications for atmospheric structure, and the reduction in growth rates of planetary scale baroclinic instability and (2) the enstrophy budget, and its role in limiting the amplitude of forced Rossby waves. These two topics are important for understanding the dynamics of, respectively, the extratropical and tropical atmosphere structure and critical components in the development of physically based climate models. Particularly interesting should be an observational analysis examining the relationship between changes in the sea surface temperatures associated with El Nino events and changes in the intensity of the Hadley circulation. In addition, Dr. Lindzen will continue to study stationary Rossby waves in general and including their interactions with ice sheets. He will look at both the contribution of ice sheet to the formation of Rossby waves and, in turn, their influence on the development and ablation of the ice sheets. This is important not only in its application to present day ice sheets, but potentially could be useful in understanding ice age glaciations and deglaciations. Support for this project is provided jointly by the Climate Dynamics and Large-scale Dynamic Meteorology Programs.