SGER Project to Calibrate a Deep-Sea Paleothermometer

SGER 项目校准深海古温度计

• 批准号: 9726090
• 负责人: Paul Baker
• 金额: $ 5万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-09-01 至 1998-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9726090&HistoricalAwards=false
• 关键词: SGER; Project; Calibrate; Deep; Sea

This SGER award will support analysis of stable isotopes and Mg/Ca in shells of living ostracodes collected over a range of bottom water temperatures and saturation states, as well as specimens cultured under controlled conditions. The objective is to determine whether the Mg/Ca ratio is a reliable indicator of bottom-water temperature. If a tight correlation between Mg/Ca and temperature can be demonstrated, it can be applied to correct oxygen-isotope-based estimates, which are also affected by the volume of water incorporated in ice. Use of combined Mg/Ca and oxygen isotopes will then permit paleoceanographers to assess independently both global ice volume and local bottom water temperatures under changing climate conditions.

该SGER奖将支持在一系列底层水温和饱和状态下收集的活介形虫外壳中的稳定同位素和Mg/Ca分析，以及在受控条件下培养的标本。 目的是确定Mg/Ca比值是否是底水温的可靠指标。 如果可以证明Mg/Ca和温度之间的紧密相关性，则可以将其应用于校正基于氧同位素的估计，这也受到冰中水含量的影响。 使用镁/钙和氧同位素的组合将允许古海洋学家在不断变化的气候条件下独立评估全球冰量和当地底层水温。