| DOI: | 10.2172/1163483
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| 报告号: | DOE-PRINCETON-04902
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| 报告题名: | The Impact of Global Warming on the Carbon Cycle of Arctic Permafrost: An Experimental and Field Based Study |
| 作者: | Onstott, Tullis C1; Pffifner, Susan M; Chourey, Karuna2
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| 出版年: | 2014
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| 发表日期: | 2014-11-07
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| 总页数: | 204
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| 国家: | 美国
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| 语种: | 英语
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| 英文关键词: | permafrost
; climate
; methane
; metagenomes
; metatranscriptomes
; metaproteomes
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| 中文主题词: | 碳
; 永久冻土
; 冷冻土
; 甲烷
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| 主题词: | CARBON
; PERMAFROST
; CRYOSOLS
; METHANE
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| 英文摘要: | Our results to date indicate that CO2 and CH4 fluxes from organic poor, Arctic cryosols on Axel Heiberg Island are net CH4 sinks and CO2 emitters in contrast to organic-rich peat deposits at sub-Arctic latitudes. This is based upon field observations and a 1.5 year long thawing experiment performed upon one meter long intact cores. The results of the core thawing experiments are in good agreement with field measurements. Metagenomic, metatranscriptomic and metaproteomic analyses indicate that high affinity aerobic methanotrophs belong to the uncultivated USCalpha are present in <1% abundance in these cryosols are are active in the field during the summer and in the core thawing experiments. The methanotrophs are 100 times more abundant than the methanogens. As a result mineral cryosols, which comprise 87% of Arctic tundra, are net methane sinks. Their presence and activity may account for the discrepancies observed between the atmospheric methane concentrations observed in the Arctic predicted by climate models and the observed seasonal fluctuations and decadal trends. This has not been done yet. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1163483
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| Citation statistics: |
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/41372
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| 1163483.pdf（299KB） | 研究报告 | -- | 开放获取 | | View
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作者单位: | 1. Princeton University
2. Oak Ridge National Laboratory
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| Recommended Citation: | |
Onstott, Tullis C,Pffifner, Susan M,Chourey, Karuna. The Impact of Global Warming on the Carbon Cycle of Arctic Permafrost: An Experimental and Field Based Study. 2014-01-01.
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