Millennial-Scale Variability in Western North Atlantic Intermediate and Deep Water Conditions during MIS 11-12

MIS 11-12 期间北大西洋西部中层和深水条件的千年尺度变化

• 批准号: 9906689
• 负责人: Robert Thunell
• 金额: $ 19.99万
• 依托单位: University of South Carolina at Columbia
• 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: 1999-12-15 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9906689&HistoricalAwards=false
• 关键词: Millennial; Scale; Variability; Western; North

The PI will use cores collected by ODP in the western North Atlantic in all major water-mass depths to study millennial scale changes in deep and intermediate water properties during the glacial-interglacial cycle represented by marine isotope stages 11 and 12 (470-360 ka). The study will monitor high-frequency changes in the production of North Atlantic Ceep Water and Glacial North Atlantic Intermediate Water. The study will also help quantify the contributions of bottom water-temperature change and ice-volume change to the overall oxygen-isotopic composition in that time interval, that will alow to better constrain the magnitude of sea-level change, which has been hypothesized to have been 30% greater than the most recent sea-level rise following last glacial maximum.

在海洋同位素第11和第12阶段(470-360ka)所代表的冰期-间冰期循环期间，PI将使用在北大西洋西部所有主要水团深度收集的钻探岩心，研究深层和中层水性质的千年尺度变化。这项研究将监测北大西洋CEEP水和冰川北大西洋中间水的产量的高频变化。这项研究还将有助于量化底层水温变化和冰量变化在这段时间内对整个氧同位素组成的贡献，这将更好地限制海平面变化的幅度，据推测，海平面变化的幅度比上一次冰川盛期之后最近一次海平面上升高出30%。