Decadal Variability of Subtropical Mode Water, Gulf Stream Separation and Large-Scale Atmospheric Fields in the N. Atlantic Ocean from 1954-1999

1954-1999年北大西洋副热带模态水、湾流分离和大尺度大气场的年代际变化

• 批准号: 9818465
• 负责人: Terrence Joyce
• 金额: $ 33万
• 依托单位: Woods Hole Oceanographic Institution
• 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: 1999-03-01 至 2003-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9818465&HistoricalAwards=false
• 关键词: Decadal; Variability; Subtropical; Mode; Water

Joyce / OCE-9818465Recent observations for the World Ocean Circulation Experiment (WOCE)period, the 1990s, will be used to extend an existing time series of the NorthAtlantic Circulation. The goal is to examine if the Subtropical Mode water, theGulf Stream position and continue to co-vary with large scale atmospheric heatand buoyancy forcing and a North Atlantic Oscillation index. The feedbackhypothesis to be tested is that the Gulf Stream separation point is influenced byvariability of the southward transport of Labrador Sea Water which then alterstorm racks and atmospheric forcing so as to negatively damp Labrador SeaWater production.

Joyce / OCE-9818465 1990年代世界海洋环流实验期间的最新观测结果将用于扩展现有的北大西洋环流时间序列。目标是检查是否副热带模态水，墨西哥湾流的位置，并继续与大尺度大气热和浮力强迫和北大西洋涛动指数共同变化。待检验的反馈假设是，墨西哥湾流分离点受到拉布拉多海水向南输送的变化的影响，拉布拉多海水向南输送的变化改变了风暴架和大气强迫，从而对拉布拉多海水生产产生负面影响。