International Research Fellow Awards: A Revised Temperature Calibration of Planktonic Foraminiferal f18O and Mg/Ca Ratios

[902663] mortyn国际研究员奖励计划使美国科学家和工程师能够在国外进行三到二十四个月的研究。该计划的奖励为联合研究提供了机会，并利用独特或互补的设施、专业知识和国外的实验条件。该奖项将支持P. Graham Mortyn博士与Gerald Ganssen博士在荷兰阿姆斯特丹自由大学Geomarine中心进行为期12个月的博士后研究访问。根据第一年的支持结果，额外的六个月的支持是由海洋地质和地球物理项目提供的。本研究的目的是进一步发展和校准深海沉积物中常规保存的浮游有孔虫碳酸盐壳化石的氧同位素组成和镁/钙评估古海表温度的方法。重点将放在用现代温度测量校准的中高纬度物种上。如果能确定盐度和镁/钙之间的独立关系，它将消除使用这种地球化学示踪剂作为海洋表面温度代理的一些模糊性。甘森是古海洋学和古气候学领域的领军人物。他与剑桥大学的Henry Elderfield博士合作，从北大西洋的现代浮游有孔虫样本中测量Mg/Ca和Cd/Ca的比值。Mortyn博士将受益于这个在微量元素地球化学领域连接三个国家的三方联盟

9902663MortynThe International Research Fellow Awards Program enables U.S. scientists and engineers to conduct three to twenty-four months of research abroad. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions abroad.This award will support a twelve-month postdoctoral research visit by Dr. P. Graham Mortyn to work with Dr. Gerald Ganssen at the Geomarine Center of the Free University in Amsterdam, The Netherlands. An additional six months of support is available based on the results of the first year of support, provided by the Marine Geology and Geophysics Program.The aim of this research is to further develop and calibrate the oxygen isotopic composition and magnesium/calcium methods of assessing paleo-SST (sea surface temperature) in the fossilized carbonate shells of planktonic foraminifera, which are routinely preserved in deep-sea sediments. The focus will be on mid-to High-latitude species calibrated with modern temperature measures. If an independent relationship can be determined between salinity and magnesium/calcium, it would remove some of the obscurity in the use of this geochemical tracer as a sea surface temperature proxy.Dr. Ganssen is a leading researcher in the field of paleoceanography and paleoclimatology. He has formed a collaboration with Dr. Henry Elderfield at the University of Cambridge to measure Mg/Ca and Cd/Ca ratios from modern planktonic foraminiferal samples from the North Atlantic. Dr. Mortyn will benefit from being part of this three-way alliance linking three countries in the field of trace-element geochemistry.***