Dynamic Meteorology

动态气象学

• 批准号: 9813795
• 负责人: Richard Lindzen
• 金额: --
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-01-01 至 2001-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9813795&HistoricalAwards=false
• 关键词: Dynamic; Meteorology

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.

Lindzen博士继续研究一些与大气动力学中平衡作用相关的主题。两个广泛的兴趣领域是：(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性增长率的降低；(2)熵收支及其在限制强迫罗斯比波振幅方面的作用。这两个主题对于理解温带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成分是很重要的。特别有趣的应该是一项观测分析，研究与厄尔尼诺事件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静止的罗斯比波，包括它们与冰盖的相互作用。他将研究冰盖对罗斯比波形成的贡献，以及它们对冰盖发展和消融的影响。这不仅在将其应用于目前的冰盖上很重要，而且在理解冰河时期的冰川作用和冰川消退方面也可能很有用。该项目由气候动力学和大尺度动态气象学项目联合提供支持。