Stratosphere-Troposphere Coupling Studies

平流层-对流层耦合研究

• 批准号: 0434713
• 负责人: Mark Baldwin
• 金额: $ 71.33万
• 依托单位: NorthWest Research Associates, Incorporated
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-11-15 至 2008-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0434713&HistoricalAwards=false
• 关键词: Stratosphere; Troposphere; Coupling; Studies

This project will investigate how the stratosphere acts as an integrator of high-frequency-wave forcing from below, creating long-lived circulation anomalies in the lower stratosphere which feed back to affect tropospheric weather and climate. Three major questions to be addressed by this research are: 1) What are the stratospheric effects at Earth's surface? 2) As climate changes, what will the effects be on climate? 3) By what mechanisms are stratospheric effects communicated to Earth's surface? The work will be performed using a combination of observations and models, and will focus on understanding those dynamical mechanisms via which stratospheric circulation anomalies are communicated to the Earth's surface. Direct and indirect effects, coupled with planetary and synoptic-scale waves, are believed to make significant contributions. The relationship of stratosphere-troposphere coupling to the quasi-biennial oscillation, the El Nino Southern Oscillation, and the position of the subtropical jet, will also be studied. This project is expected to result in further advances in understanding the long-term changes in weather and climate, and therefore has important practical benefits to society.

该项目将研究平流层如何作为高频波从下方强迫的积分器，在平流层下部产生长期的环流异常，并反馈影响对流层的天气和气候。这项研究要解决的三个主要问题是：1)平流层对地球表面的影响是什么？2)随着气候的变化，平流层影响将对气候产生什么影响？3)平流层影响通过什么机制传递到地球表面？这项工作将结合观测和模型进行，重点是了解平流层环流异常传递到地球表面的动力学机制。直接和间接影响，再加上行星和天气尺度的波动，被认为是重要的贡献。还将研究平流层-对流层耦合与准两年振荡、厄尔尼诺南方涛动和副热带急流位置的关系。预计该项目将在了解天气和气候的长期变化方面取得进一步进展，因此对社会具有重要的实际效益。