Interannual Climate Variability

年际气候变化

• 批准号: 9906454
• 负责人: Tsing-Chang Chen
• 金额: $ 20.77万
• 依托单位: Iowa State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-12-01 至 2003-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9906454&HistoricalAwards=false
• 关键词: Interannual; Climate; Variability

The planned 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.

计划中的工作旨在利用CCM与海洋混合层模式相结合来研究热带大西洋变率的机制。提出了三个面向过程的实验：（i）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将确定风引起的热通量是否是热带大西洋季节到年代际变化的主要影响因素。(ii)远程影响实验这将量化太平洋ENSO对TAV的最强远程影响的大小和位置。PI将研究ENSO的远程影响如何与TAV中的本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。PI将研究海洋热平流的平均电流和异常Ekman流如何与耦合过程在热带大西洋相互作用的工作是重要的，因为它将加强对低频气候变率在热带大西洋的基本理解。这种理解对于改进该地区的气候预测至关重要，这具有社会效益。