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

01026057布鲁克该奖项支持南极和其他冰芯中用于古环境和年代学目的的捕集气体的工作。该项目将完成一项来自Siple Dome冰芯的约10万年的高分辨率大气甲烷记录，并使用这些数据来构建Siple Dome记录的气候事件的精确年表。此外，GISP2(格陵兰)冰芯记录的分辨率将在一些关键间隔内提高，以帮助Siple Dome年代学和未来冰芯的年代学。最后，升级实验室的分析能力，包括提高精度和吞吐量，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理解上一次冰期南北半球气候快速变化的时间、第四纪晚期全球甲烷收支的演变以及南极洲第四纪晚期气候历史。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内容。

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.