The Dynamics of Low-Frequency Phenomena

低频现象的动力学

• 批准号: 0328842
• 负责人: Peter Webster
• 金额: $ 64.34万
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-01-01 至 2005-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0328842&HistoricalAwards=false
• 关键词: Dynamics; Low; Frequency; Phenomena

The PI will address large-scale low-frequency phenomena that dominate tropical processes and have sources either within the tropics or higher latitudes. The principal phenomena of interest are the Asian-Australian monsoon and El Nino Southern Oscillation and their component modes, all of which range in time scale from intraseasonal to interannual. The PI proposes to focus on the following four specific research themes:(1) the monsoon as a coupled ocean-atmosphere phenomena; (2) monsoon intraseasonal variability in a coupled ocean-atmosphere context;(3) mechanisms by which the tropics influence the extratropics and vice versa on time scales that range from synoptic to interannual; and(4) the variable nature of the long-term relationships between boundary forcing and climate variability. The work is important because it will lead to improved understanding of major climate phenomena, especially the monsoon over a wide range of time scales.

PI将解决主导热带过程的大规模低频现象，并在热带或高纬度地区的来源。感兴趣的主要现象是亚洲-澳大利亚季风和厄尔尼诺南方涛动及其组成模式，所有这些都在时间尺度上从季节内到年际变化。PI建议重点关注以下四个具体的研究主题：（1）季风作为一种耦合的海洋-大气现象;（2）耦合的海洋-大气背景下的季风季节内变率;（3）热带影响热带外的机制，反之亦然，从天气到年际的时间尺度;和（4）边界强迫和气候变率之间的长期关系的可变性质。这项工作很重要，因为它将导致更好地了解主要的气候现象，特别是在广泛的时间尺度上的季风。