Tropical Atmosphere-Ocean Circulation Changes Near 2.8 Myr: Analysis of a Dynamically Coupled System

2.8 Myr 附近的热带大气-海洋环流变化：动态耦合系统分析

• 批准号: 9530285
• 负责人: Peter DeMenocal
• 金额: $ 15万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-09-01 至 1998-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9530285&HistoricalAwards=false
• 关键词: Tropical; Atmosphere; Ocean; Circulation; Changes

9530285 DeMenocal Did tropical atmosphere-ocean circulation change near 2.8 Ma? African precipitation and Atlantic upwelling are linked at annual and orbital time scales through insolation forcing of West African monsoon. ODP site 662, off west Africa, will be studied for winter dust input within equatorial Atlantic upwelling system. Freshwater diatoms and nannofossils will be used to monitor variations in African precipitation and tropical upwelling. The study will help answer the question about circulation changes in the mild Pliocene.

2.8 Ma附近热带大气-海洋环流有变化吗？非洲降水和大西洋上升流在年和轨道时间尺度上通过西非季风的日照强迫联系在一起。ODP站点662位于西非海域，将研究赤道大西洋上升流系统的冬季沙尘输入。淡水硅藻和纳米化石将用于监测非洲降水和热带上升流的变化。这项研究将有助于回答有关上新世温和期环流变化的问题。