Glacial-Interglacial Changes in the Intermediate Depth Circulation of the Subpolar North Atlantic

副极地北大西洋中深度环流的冰期-间冰期变化

• 批准号: 9116259
• 负责人: Scott Lehman
• 金额: $ 35.47万
• 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: 1992
• 资助国家: 美国
• 起止时间: 1992-01-01 至 1995-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9116259&HistoricalAwards=false
• 关键词: Glacial; Interglacial; Changes; Intermediate; Depth

This study will attempt to determine the origin of nutrient- depleted glacial North Atlantic Intermediate Water (GNAIW) during the last glacial maximum (LGM) and changes in the subpolar north Atlantic vertical nutrient gradient over several climatic cycles. A nutrient vs depth profile for LGM on Rockfall Plateau/Hatton Drift and Erik Ridge near the source of formation of intermediate and deep waters will be constructed. Carbon-isotopic ratios in benthic foraminifera and Cd/Ca ratios will provide clues to the origin of GNAIW.

这项研究将试图确定营养素的来源- 北大西洋中层水（GNAIW） 末次盛冰期（LGM）和副极地北部的变化 几个气候周期的大西洋垂直营养梯度。 Rockfall Plateau/Hatton末次冰期的营养盐-深度剖面 漂洋过海与埃里克海岭源附近形成中间层 建造深水沃茨。 碳同位素比值 底栖有孔虫和Cd/Ca比值将提供线索， GNAIW的起源