Tropical Ocean-Atmosphere Interaction

热带海洋-大气相互作用

• 批准号: 9215090
• 负责人: J David Neelin
• 金额: $ 28.7万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-08-15 至 1995-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9215090&HistoricalAwards=false
• 关键词: Tropical; Ocean; Atmosphere; Interaction

This research is aimed at understanding the mechanisms of ocean-atmosphere interaction in the tropics and the phenomena that these produce. The methods and models already developed will be applied to three main areas: 1) Contined work on interannual variability, emphasizing analytical as well as numerical approaches. 2) Initiation of work on the effects of coupled feedbacks in the climatology. Tropical climate features in coupled general circulation models (GCMs) appear to be quite sensitive to coupled feedbacks involving three-dimensional dynamical interactions. Much of the current discussion of ocean- atmosphere interaction in tropical climate centers on a one- dimensional, vertical column point of view. A complementary approach is proposed, aimed at developing understanding of the interactions which are nonlocal in the horizontal. 3) Tropcial atmosphere modeling. Current simple atmospheric models used in coupling have a number of deficiencies for this type of study. Further development of a model of complexity intermediate between these and atmospheric GCMs is proposed; in particular one for which near-analytic versions can be obtained in simplifying cases, thanks to the properties of the Betts (1986) convection scheme. The mechanisms driving both the tropical atmospheric response to surface boundary conditions and intraseasonal variability, such as the Madden- Julian oscillation, will be examined. This research is important because it is one of the studies which will help determine the feasibility of modeling the coupled ocean-atmosphere system for the purpose of predicting its variations on time scales of months to years, an issue of concern in climate variability.

本研究旨在了解热带海洋-大气相互作用的机制及其产生的现象。已经开发的方法和模式将应用于三个主要领域：1)继续研究年际变率，强调分析方法和数值方法。2)启动了耦合反馈在气候学中的作用研究。耦合环流模式（GCMs）中的热带气候特征对涉及三维动力相互作用的耦合反馈非常敏感。目前关于热带气候中海洋-大气相互作用的讨论大多集中在一维垂直柱的观点上。提出了一种互补的方法，旨在发展对横向非局部相互作用的理解。3)热带大气模拟。目前用于耦合的简单大气模式在这类研究中存在许多不足。建议进一步发展介于这些和大气gcm之间的复杂模式；特别是由于贝茨（1986）对流方案的性质，在简化情况下可以得到近解析版本的问题。将研究驱动热带大气对地表边界条件的响应和季节内变率（如马登-朱利安振荡）的机制。这项研究是重要的，因为它是有助于确定模拟耦合海洋-大气系统的可行性的研究之一，目的是预测其在月到年的时间尺度上的变化，这是气候变率中一个令人关注的问题。