Experimental Verification of Stable Isotope and Trace Metal Incorporation in Living Planktonic Foraminifera

本项目将培养浮游有孔虫，以解决有关方解石骨架中稳定同位素和微量元素掺入控制的问题。讨论的主题包括：海水碳酸盐化学和温度在温水和冷水分类群同位素比率中的作用，Mg浓度与温度的关系，以及Cd浓度与养分含量的关系。当对这些示踪剂的环境控制得到更好的理解时，就有可能利用化石有孔虫的地球化学来对海洋和气候变化进行更准确的定量估计。这些估计可用于测试气候模式在模拟各种条件下（如最近的过去）气候时的准确性。

This project will culture planktic foraminifera to address questions concerning the controls upon incorporation of stable isotopes and trace elements in the calcite skelteon. Topics to be addressed include: the role of seawater carbonate chemistry and of temperature in isotopic ratios in warm-and cold-water taxa, the relationship of Mg concentration to temperature, and the relation of Cd concentration to nutrient content. When the environmental controls on these tracers are better understood, it will be possible to use the geochemistry of fossil foraminifera to produce more accurate quantitative estimates of ocean and climate changes. The estimates can be used to test the accuracy of climate models in simulating climate under various conditions such as those of the recent past.