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

合作研究：大西洋数十年振荡的百年尺度记录

• 批准号: 0823268
• 负责人: Simon Thorrold
• 金额: $ 15万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-15 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0823268&HistoricalAwards=false
• 关键词: Collaborative; Research; Centennial; Scale; Records

Swart/Hollander 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.

Swart/霍兰德0823268该奖项将提供资金，用于使用硬海绵文石地球化学获得100至1000年期间大西洋年代际振荡（AMO）的新代理记录（18O/16O和Sr/Ca），并研究文石骨骼材料取样过程中由于蚀变而导致的稳定氧和碳（13 C/12 C）同位素数据中可能的伪像。具体目标包括：1）生成硬海绵地球化学数据，结合改进的年代测定，以确认仪器记录（~1850年）之前和之后巴哈马和加勒比多个地点的盐度和AMO之间的相关联系，（2）利用新的~（18）Sr/Ca和~（18）O系列，改进了温度与Sr/Ca和~（18）O的地球化学标定方法1986年至1996年采集的24个硬海绵标本; 3）调查热带地下环境中作为环境条件记录器的额外微量和痕量元素。 更广泛的影响包括旨在了解气候系统的一个基本问题的研究的社会相关性，这可能对气候系统的人为强迫产生协同影响，并支持本科生和研究生的研究。