High Resolution Records of Atmospheric Methane in Ice Cores and Implications for Late Quaternary Climate Change

冰芯中大气甲烷的高分辨率记录及其对晚第四纪气候变化的影响

• 批准号: 0512971
• 负责人: Edward Brook
• 金额: --
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-08-01 至 2007-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0512971&HistoricalAwards=false
• 关键词: Resolution; Records; Atmospheric; Methane; Ice

01026057BrookThis award supports work on trapped gases in Antarctic and other ice cores for paleoenvironmental and chronological purposes. The project will complete a ~ 100,000 year, high-resolution record of atmospheric methane from the Siple Dome ice core and use these data to construct a precise chronology for climate events recorded by the Siple Dome record. In addition, the resolution of the GISP2 (Greenland) ice core record will be increased in some critical intervals to help with the Siple Dome chronology and that of future ice cores. Finally, an upgrade to the analytical capabilities of the laboratory, including increasing precision and throughput and decreasing sample size needed for ice core methane measurements will be an important goal of this work. The proposed work will contribute to the understanding of the timing of rapid climate change in the Northern and Southern hemispheres during the last glacial period, the evolution of the global methane budget in the late Quaternary, and the late Quaternary climate history of Antarctica. It will also improve our ability to generate methane records for future ice coring projects, and inform and enrich the educational and outreach activities of our laboratory.

01026057布鲁克该奖项支持南极和其他冰芯中捕获的气体的古环境和年代学目的的工作。 该项目将完成对Siple Dome冰芯大气甲烷的约10万年高分辨率记录，并利用这些数据为Siple Dome记录的气候事件构建精确的年表。 此外，GISP2（格陵兰）冰芯记录的分辨率将在某些关键间隔内提高，以帮助Siple Dome年表和未来冰芯年表。 最后，提高实验室的分析能力，包括提高精度和产量，减少冰芯甲烷测量所需的样本量，将是这项工作的一个重要目标。 拟议的工作将有助于了解末次冰期期间北方和南半球气候快速变化的时间，晚第四纪全球甲烷收支的演变以及南极晚第四纪气候历史。 它还将提高我们为未来的冰芯项目生成甲烷记录的能力，并为我们实验室的教育和推广活动提供信息和丰富。