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Accelerated methane emission from permafrost regions since the 20th century

文献类型：期刊论文

作者Xie, Guo-zhi1,2,3; Zhang, Li-peng1,2,3; Li, Cong-ying1,2,3; Sun, Wei-dong1,2,3
刊名DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
出版日期2023-05-01
卷号195页码:8
ISSN号0967-0637
关键词Permafrost region Methane emission AO2 ACO2 index Permafrost thawing
DOI10.1016/j.dsr.2023.103981
通讯作者Sun, Wei-dong(weidongsun@qdio.ac.cn)
英文摘要Carbon dioxide has been increasing in the atmosphere since the industrialization, resulting in global warming, which in turn enhanced methane emissions from permafrost regions. However, methane emitted into the at-mosphere is quickly oxidized, such that the intensity and threat of methane emission in the past are severely underestimated. Here we show that the ratio between annual changes in atmospheric oxygen and carbon dioxide concentrations (AO2/ACO2 index) dropped dramatically between 1945 and 1958. There are no such abrupt changes in the fossil fuel combustion curve. Considering that atmospheric methane has the residence time less than-9 years through biological and chemical processes, this crisis is attributed to the World War II, which had disturbed gas hydrates underneath ocean floors and permafrost regions. Consistently, the land-ocean tempera-ture index fluctuated more severely in permafrost regions than the global average during the WWII, indicating stronger greenhouse effects induced by methane emission. This is supported by the changes in the AO2/ACO2 index, coupled with higher atmospheric methane concentrations and lower 813CO2 in permafrost regions in the last three decades, suggesting accelerated methane emission. The anthropogenic carbon dioxide emission has been pushing the accelerated thawing of permafrost, which promotes methane emission that further intensifies permafrost thawing and global warming. Such a positive feedback at an inflection point of Earth climate may break the glacial-interglacial cycle and initiate a long-lasting greenhouse period.
WOS关键词CLIMATE-CHANGE ; CARBON RELEASE ; ANTARCTIC ICE ; BUDGET ; SEEPS
资助项目Strategic Priority Research Program of the Chinese Academy of Sciences[XDA22050103] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB42020303] ; Taishan Scholar Program of Shandong[ts201712075]
WOS研究方向Oceanography
语种英语
出版者PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号WOS:001009360100001
源URL[http://ir.qdio.ac.cn/handle/337002/182305]  
专题海洋研究所_深海极端环境与生命过程研究中心
通讯作者Sun, Wei-dong
作者单位1.Inst Oceanol, Chinese Acad Sci, Ctr Deep Sea Res, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China
2.Laoshan Lab, Deep Sea Multidisciplinary Res Ctr, Qingdao 266237, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Xie, Guo-zhi,Zhang, Li-peng,Li, Cong-ying,et al. Accelerated methane emission from permafrost regions since the 20th century[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2023,195:8.
APA Xie, Guo-zhi,Zhang, Li-peng,Li, Cong-ying,&Sun, Wei-dong.(2023).Accelerated methane emission from permafrost regions since the 20th century.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,195,8.
MLA Xie, Guo-zhi,et al."Accelerated methane emission from permafrost regions since the 20th century".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 195(2023):8.

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来源：海洋研究所

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