气候变化领域集成服务门户(CCPortal): Methane release from carbonate rock formations in the Siberian permafrost area during and after the 2020 heat wave

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DOI	10.1073/pnas.2107632118
	Methane release from carbonate rock formations in the Siberian permafrost area during and after the 2020 heat wave
	Froitzheim N.; Majka J.; Zastrozhnov D.
发表日期	2021
ISSN	0027-8424
卷号	118 期号:32
英文摘要	Anthropogenic global warming may be accelerated by a positive feedback from the mobilization of methane from thawing Arctic permafrost. There are large uncertainties about the size of carbon stocks and the magnitude of possible methane emissions. Methane cannot only be produced from the microbial decay of organic matter within the thawing permafrost soils (microbial methane) but can also come from natural gas (thermogenic methane) trapped under or within the permafrost layer and released when it thaws. In the Taymyr Peninsula and surroundings in North Siberia, the area of the worldwide largest positive surface temperature anomaly for 2020, atmospheric methane concentrations have increased considerably during and after the 2020 heat wave. Two elongated areas of increased atmospheric methane concentration that appeared during summer coincide with two stripes of Paleozoic carbonates exposed at the southern and northern borders of the Yenisey-Khatanga Basin, a hydrocarbon-bearing sedimentary basin between the Siberian Craton to the south and the Taymyr Fold Belt to the north. Over the carbonates, soils are thin to nonexistent and wetlands are scarce. The maxima are thus unlikely to be caused by microbial methane from soils or wetlands. We suggest that gas hydrates in fractures and pockets of the carbonate rocks in the permafrost zone became unstable due to warming from the surface. This process may add unknown quantities of methane to the atmosphere in the near future. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Gas hydrate; Global warming; Permafrost; Siberia; Thermogenic methane
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/238450
作者单位	Institute of Geosciences, University of Bonn, Bonn, 53115, Germany; Department of Earth Sciences, Uppsala University, Uppsala, 752 36, Sweden; Faculty of Geology, Geophysics and Environmental Protection, Agh University of Science and Technology, Kraków, 30-059, Poland; A. P. Karpinsky Russian Geological Research Institute, St. Petersburg, 199106, Russian Federation; Volcanic Basin Petroleum Research, Oslo, N-0361, Norway
推荐引用方式 GB/T 7714	Froitzheim N.,Majka J.,Zastrozhnov D.. Methane release from carbonate rock formations in the Siberian permafrost area during and after the 2020 heat wave[J],2021,118(32).
APA	Froitzheim N.,Majka J.,&Zastrozhnov D..(2021).Methane release from carbonate rock formations in the Siberian permafrost area during and after the 2020 heat wave.Proceedings of the National Academy of Sciences of the United States of America,118(32).
MLA	Froitzheim N.,et al."Methane release from carbonate rock formations in the Siberian permafrost area during and after the 2020 heat wave".Proceedings of the National Academy of Sciences of the United States of America 118.32(2021).