Collaborative Research: Centennial Scale Records of the Atlantic Multi-decadal Oscillation

斯沃特/索罗德0823636/0823268这项奖励将提供资金，使用硬质响应型文石地球化学(18O/16O和锶/钙)获得1000年至1000年期间大西洋十年涛动的新替代记录，并调查由于文石骨架材料采样过程中的变化而导致的稳定氧和碳(13C/12C)同位素数据中可能存在的伪迹。具体目标包括：1)结合改进的测年方法，生成盐度与巴哈马和加勒比海多个地点的盐度之间的相关联系；(2)在仪器记录(~1850)之前和之后，改进温度与锶/钙和d18O之间的地球化学校准；(3)调查额外的微量和微量元素，以记录热带次表层环境的环境条件。更广泛的影响包括旨在理解气候系统的一个基本问题的研究的社会相关性，该问题可能对人类促成的气候系统的强制作用产生协同影响，并支持本科生和研究生的研究。

Swart/Thorrold 0823636/0823268This award will provide funds to obtain new proxy records of the Atlantic Multidecadal Oscillation (AMO) over time periods between 100 to 1000 years using sclerosponge aragonite geochemistry (18O/16O and Sr/Ca), and to investigate possible artifacts in stable oxygen and carbon (13C/12C) isotope data due to alteration during the sampling of aragonitic skeletal material. Specific objectives include 1) the generation of sclerosponge geochemical data, combined with improved dating, to confirm a correlative link between salinity and AMO at multiple locations in the Bahamas and Caribbean both prior to and after the instrumental record (~1850), 2) improvement of the geochemical calibrations between temperature and Sr/Ca and d18O based on a new collection of ~ 24 sclerosponge specimens collected between 1986 and 1996 and 3) investigation of additional minor and trace elements as recorders of environmental conditions in the tropical subsurface environment. The Broader Impacts include the societal relevance of research directed at understanding a fundamental question of the climate system that could have a synergistic impact on human-contributed forcings of the climate system and support of research by undergraduate and graduate students.