Air Sea Feedbacks in Tropical Atlantic Variability Using Coupled CCM3-Ocean Mixed-Layer Model

使用耦合 CCM3-海洋混合层模型的热带大西洋变化的海气反馈

• 批准号: 9907625
• 负责人: Ping Chang
• 金额: $ 29.01万
• 依托单位: Texas A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-09-01 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9907625&HistoricalAwards=false
• 关键词: Air; Sea; Feedbacks; Tropical; Atlantic

The proposed work seeks to investigate mechanisms of Tropical Atlantic Variability (TAV) using the CCM coupled to an ocean mixed layer model. Three process-oriented experiments are proposed: (i) Air-sea Feedback Experiment. This will test important positive feedback processes in the tropical Atlantic region. In particular, the PIs will determine whether or not, wind-induced heat flux is a major contributing factor to seasonal-to-decadal variability in the tropical Atlantic. (ii) Remote Influence Experiment. This will quantify the magnitude and location of the strongest remote influence from Pacific ENSO on TAV. The PI will examine how the remote influence of ENSO interacts with local air-sea feedbacks in TAV. (iii) Ocean Process Experiment. This will explore the effect of oceanic processes on TAV. The PI will investigate how oceanic heat advection by mean currents and by anomalous Ekman flow interacts with coupled processes in tropical AtlanticThe work is important because it will enhance basic understanding on low frequency climate variability in the Tropical Atlantic. Such an understanding is fundamental for making improved climate forecasts for the region, this has societal benefits.

提出的工作旨在利用与海洋混合层模式耦合的CCM来研究热带大西洋变率（TAV）的机制。提出了三个面向过程的实验：(1)海气反馈实验。这将检验热带大西洋区域重要的正反馈过程。特别是，pi将决定风致热通量是否是热带大西洋季节-年代际变化的主要促成因素。（二）远程影响实验。这将量化太平洋ENSO对TAV最强烈的远程影响的大小和位置。该项目将研究ENSO的远程影响如何与TAV的当地海气反馈相互作用。（iii）海洋过程实验。这将探讨海洋过程对TAV的影响。该项目将研究平均海流和异常埃克曼流对热带大西洋的海洋热平流如何与耦合过程相互作用。这项工作很重要，因为它将加强对热带大西洋低频气候变率的基本认识。这样的理解对于改进该地区的气候预报是至关重要的，这具有社会效益。