Reconstructing the role of CO2 in climate change throughout the Cenozoic Step 1: The mid-Pleiostocene transition

PIS将从塞拉利昂隆起的ODP点产生浮游有孔虫的硼同位素数据的岩心下部记录，并估计从约450ka到中更新世过渡期间的表层海洋pH，在此期间，约1.8 Ma发生了重大的气候重组。他们将使用同一岩心的其他替代记录来估计海表面温度和盐度，使他们能够根据古pH记录计算古表面海洋二氧化碳分压。通过假设该地区大气和表层海洋之间的准平衡，这项研究将使对大气二氧化碳的估计可以超过从冰芯获得二氧化碳记录的时间间隔。除了对超过450ka的大气二氧化碳的极其有用的记录，这项拟议的研究将支持一位致力于教育和学生参与研究的年轻女科学家。

0623621BroeckerThe PIs will generate downcore records of planktonic foraminiferal Boron isotopic data from ODP Site from the Sierra Leone Rise, and estimate surface ocean pH for the period extending from about 450 ka to the mid-Pleistocene transition where a major climate reorganization occurred at about 1.8 Ma. They will use other proxy records from the same core to estimate sea surface temperature and salinity enabling them to calculate paleo-surface ocean pCO2 from the paleo-pH record. By assuming quasi-equilibrium between the atmosphere and the surface ocean in this region, will allow an estimate of atmospheric pCO2 that will extend beyond the time interval for which pCO2 records can be obtained from ice cores.In addition to being an extremely useful record of atmospheric CO2 beyond 450 ka, which will be useful to many paleoclimatologists and paleoceanographers, the proposed study will support a young female scientist who is committed to education and student participation in research.