Holocene Climate Variation and Thermohaline Circulation in the Atlantic

全新世气候变化与大西洋温盐环流

• 批准号: 9905605
• 负责人: William Curry
• 金额: $ 49.57万
• 依托单位: Woods Hole Oceanographic Institution
• 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: 1999-10-01 至 2004-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9905605&HistoricalAwards=false
• 关键词: Holocene; Climate; Variation; Thermohaline; Circulation

This ESH project will test the hypothesis that millenial cooling events in the North Atlantic during the Holocene are caused by reduced meridional heat transport from the tropics. High0accumulation-rate sediment cores from the Bahamas and the Brazil margin spanning thermocline depths (400-1000 m) will be analyzed at 250-year intervals for C and O isotopic composition of benthic and planktic foraminifera, with emphasis on the benthic 18 O data. A temporal correlation between high-latitude, surface water cooling and low-latitude, thermocline warming at these sites will support the hypothesis.

该 ESH 项目将检验全新世期间北大西洋千年变冷事件是由热带经向热传输减少引起的假设。 将每隔 250 年对来自巴哈马和巴西边缘跨越温跃层深度（400-1000 m）的高积累率沉积物岩心进行底栖和浮游有孔虫的 C 和 O 同位素组成分析，重点是底栖 18 O 数据。 这些地点的高纬度地表水冷却与低纬度温跃层变暖之间的时间相关性将支持这一假设。