Collaborative Research: TransArctic Paleoclimate of the Eocene

合作研究：始新世跨北极古气候

• 批准号: 0806228
• 负责人: Roger Summons
• 金额: $ 36.83万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0806228&HistoricalAwards=false
• 关键词: Collaborative; Research; TransArctic; Paleoclimate; Eocene; Collaborative; Research; TransArctic; Paleoclimate; Eocene

Funds are provided to apply the stable isotope techniques pioneered by the principal investigators for Axel Heiberg terrestrial fossils across a Trans-Arctic trajectory of Eocene field sites. The principal investigators will retrieve fossil materials from the Eastern High Arctic (Axel Heiberg and Ellesmere Island; 2008), the Western High Arctic (Banks Island; 2009), and near Anchorage, Alaska (2010). Fieldwork and the resulting analyses of sediments and plant/vertebrate fossils across these sites will provide global quantification of Eocene northern high-latitude paleoclimate. In addition to the ä13C, ä18O and äD techniques pioneered for fossil wood, cellulose, resin, organic matter and carbonate, they will apply two new chemical techniques: the use of ä18O in phenylglucosazone derived from cellulose to imply the oxygen isotope composition of environmental water, and the use of lipid biomarkers known as glycerol dialkyl glycerol tetraethers (GDGTs) to infer soil temperature. They anticipate that their analyses will yield a quantification of organismal carbon-cycling, soil temperature, atmospheric relative humidity, environmental water source and inference of weather pattern, across a global Eocene Arctic transect. These analyses are specifically designed to exploit the exceptionally well-preserved terrestrial organic compounds of the mummified trees and litter layers within Arctic Eocene sediments.

提供了资金，以应用稳定的同位素技术，由Axel Heiberg陆地化石的主要研究人员跨越始新世野外地点的跨北极轨迹进行了策划。首席研究人员将从东北极（Axel Heiberg and Ellesmere Island； 2008年），西部高北极（Banks Island; 2009）和阿拉斯加安克雷奇附近取回化石材料（2010年）。对这些地点的沉积物和植物/脊椎动物化石的实地调查以及所得的分析将提供全球始新世北部高纬度气候的量化。 In addition to the ä13C, the techniques pionered for fossil wood, cellulose, resin, organic matter and carbonate, they will apply two new chemical techniques: the use of ä18O in phenylglucosazone derived from cellulose to imply the oxygen isotope composition of environmental water, and the use of lipid biomarkers known as glycerol dialkyl glycerol tetraethers （GDGTS）推断土壤温度。他们预计他们的分析将对有机碳循环，土壤温度，大气相对湿度，环境水源和天气模式的推断进行量化，跨全球始新世北极样带。这些分析是专门设计的，以利用北极始新世沉积物中木乃伊树和垃圾层的特殊保存完好的陆地有机化合物。