Oceanic Paleochemistry and Deep Ocean Variability

关于改革的时间和幅度的未决问题 深海的化学成分和循环可以被解决 通过对底栖有孔虫Cd的选择性配对测量， &13C和180在深海沉积物岩心。 间隙将 末次冰期充填和底栖古化学覆盖度 最大的，和核心从南大西洋，南极洲， 西北太平洋将被检查，以澄清为什么现有的13 C 和Cd的证据表明这种不同的冰川古化学 特色 两个更长的downcore Cd记录将是 完成以约束振幅、定时和频谱 底栖生物古化学变化特征 这些数据将 从碳的简单模型的角度进行研究 和海洋中的营养循环，以评估 海洋化学和环流在控制 大气CO2

Unresolved issues on the timing and magnitude of changes in deep ocean chemical composition and circulation can be tackled with selective paired measurements of benthic foraminiferal Cd, &13C, and &180 in deep ocean sediment cores. Gaps will be filled and benthic paleochemical coverage of the last glacial maximum, and cores from the South Atlantic, Antartic, and Northwest Pacific will be examined to clarify why existing &13C and Cd evidence suggest such different glacial paleochemical characteristics. Two more long downcore Cd records will be completed to constrain the amplitude, timing, and spectral chacteristics of benthic paleochemical changes. This data will be examined from the perspective of simple models for carbon and nutrient cycling within the ocean, in order to assess the role of ocean chemistry and circulation in controlling atmospheric CO2.