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SGER Project to Calibrate a Deep-Sea Paleothermometer

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:
$5.0万
依托单位:
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
项目状态:
已结题
起止时间:
1997-09-01 至 1998-08-31

项目摘要

项目成果

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中文摘要
翻译
该SGER奖将支持在一系列底水温度和饱和状态下收集的活介形类贝壳中的稳定同位素和Mg/Ca的分析,以及在受控条件下培养的标本。目的是确定Mg/Ca比值是否是底水温度的可靠指标。如果可以证明Mg/Ca与温度之间存在紧密的相关性,则可以应用于校正基于氧同位素的估计,这些估计也受到冰中掺入的水的体积的影响。然后,结合使用Mg/Ca和氧同位素将使古海洋学家能够在不断变化的气候条件下独立评估全球冰量和当地底部水温。
英文摘要
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.
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