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| Is There Cosmogenic Radiomethane in Polar Firn? | |
| 项目编号 | 0806450 |
| Jeffrey Severinghaus | |
| 项目主持机构 | University of California-San Diego Scripps Inst of Oceanography |
| 开始日期 | 2009 |
| 结束日期 | 2009-12-31 |
| 英文摘要 | Proposal: Is There Cosmogenic Radiomethane in Polar Firn? P.I.: Jeffrey P Severinghaus University of California-San Diego Scripps Inst of Oceanography Proposal # 0806450 Researchers at the University of California - San Diego?s Scripps Institute of Oceanography have received funding to test the hypothesis that cosmic rays produce small amounts of the 14C isotope of methane (14CH4) in the upper layers of snow turning in to ice (firn). This research will help determine present and past sources of methane in the atmosphere and refine our understanding of methane?s role in climate warming. Methane and other gases will be extracted from firn at Summit, Greenland by melting 1.5 tons of firn under vacuum. The ratio of 14CH4 to 12CH4 will be determined to test the hypothesis that cosmic rays generate 14C atoms that react with hydrogen to produce 14CH4 in the ice. The study is expected to provide a definitive test of the hypothesis that fossil sources of methane contributed to the rapid increases in methane concentration at the end of the last glacial period. |
| 学科分类 | 08 - 地球科学 |
| 资助机构 | US-NSF |
| 项目经费 | 35887 |
| 项目类型 | Standard Grant |
| 国家 | US |
| 语种 | 英语 |
| 文献类型 | 项目 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/72280 |
| 推荐引用方式 GB/T 7714 | Jeffrey Severinghaus.Is There Cosmogenic Radiomethane in Polar Firn?.2009. |
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