Dynamical Processes of Equatorial Atmospheric Angular Momentum

赤道大气角动量的动力学过程

• 批准号: 0514034
• 负责人: Steven Feldstein
• 金额: $ 16.79万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-07-01 至 2008-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0514034&HistoricalAwards=false
• 关键词: Dynamical; Processes; Equatorial; Atmospheric; Angular

In this project the PI will explore the physical processes that drive the intra-seasonal fluctuations of equatorial atmospheric angular momentum, which account for half of the variance of equatorial atmospheric angular momentum. The research focuses on four topics: the dynamical mechanisms by which the mountain torque alters the amplitude and phase of the equatorial atmospheric angular momentum vector, a comparison of the relative importance of the processes driving the intra-seasonal fluctuations, the relationship between equatorial atmospheric angular momentum dynamics and the background flow, and how atmospheric processes drive polar motion, i.e. fluctuations in both the pole position relative to the earth's crust and in the equatorial components of the angular momentum of the solid earth. Reanalysis and outgoing longwave radiation datasets as well as a timeseries of pole position will be used.Broader Impacts: This research will be of interest to solid-earth geophysical scientists and satellite dynamics scientists.

在这个项目中，PI将探索驱动赤道大气角动量季节性波动的物理过程，赤道大气角动量季节性波动占赤道大气角动量变化的一半。研究主要集中在四个方面：山地扭矩改变赤道大气角动量矢量振幅和相位的动力机制，驱动季节内波动的过程的相对重要性的比较，赤道大气角动量动力学与背景气流之间的关系，以及大气过程如何驱动极地运动，即相对于地壳的磁极位置和固体地球角动量的赤道分量的波动。再分析和传出的长波辐射数据集以及极点位置的时间序列将被使用。更广泛的影响：这项研究将引起固体地球物理科学家和卫星动力学科学家的兴趣。