globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2007
论文题名:
Ebullition and storm-induced methane release from the East Siberian Arctic Shelf
作者: Shakhova N.; Semiletov I.; Leifer I.; Sergienko V.; Salyuk A.; Kosmach D.; Chernykh D.; Stubbs C.; Nicolsky D.; Tumskoy V.; Gustafsson Ö.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2014
卷: 7, 期:1
起始页码: 64
结束页码: 70
语种: 英语
英文摘要: Vast quantities of carbon are stored in shallow Arctic reservoirs, such as submarine and terrestrial permafrost. Submarine permafrost on the East Siberian Arctic Shelf started warming in the early Holocene, several thousand years ago. However, the present state of the permafrost in this region is uncertain. Here, we present data on the temperature of submarine permafrost on the East Siberian Arctic Shelf using measurements collected from a sediment core, together with sonar-derived observations of bubble flux and measurements of seawater methane levels taken from the same region. The temperature of the sediment core ranged from-1.8 to 0C. Although the surface layer exhibited the lowest temperatures, it was entirely unfrozen, owing to significant concentrations of salt. On the basis of the sonar data, we estimate that bubbles escaping the partially thawed permafrost inject 100-630 mg methane m-2 d-1 into the overlying water column. We further show that water-column methane levels had dropped significantly following the passage of two storms. We suggest that significant quantities of methane are escaping the East Siberian Shelf as a result of the degradation of submarine permafrost over thousands of years. We suggest that bubbles and storms facilitate the flux of this methane to the overlying ocean and atmosphere, respectively. © 2014 Macmillan Publishers Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106426
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: International Arctic Research Center, University of Alaska, Akasofu Building, Fairbanks, AK 99775-7320, United States; Russian Academy of Sciences, Far Eastern Branch, Pacific Oceanological Institute, 43 Baltiiskaya Street, Vladivostok 690041, Russian Federation; Marine Sciences Institute, University of California, Santa Barbara, CA 93106, United States; Bubbleology Research International, Solvang, CA 93463, United States; Russian Academy of Sciences, Far Eastern Branch, Institute of Chemistry, 100-Let Vladivostok Prospect, Vladivostok 690022, Russian Federation; Geophysical Institute, University of Alaska, 903 Koyukuk Drive, Fairbanks, AK 99775-7320, United States; Moscow State University, 1-12 Leninskie Gory, Moscow 119991, Russian Federation; Department of Applied Environmental Science, Bolin Centre for Climate Research, Stockholm University, Stockholm 10691, Sweden

Recommended Citation:
Shakhova N.,Semiletov I.,Leifer I.,et al. Ebullition and storm-induced methane release from the East Siberian Arctic Shelf[J]. Nature Geoscience,2014-01-01,7(1)
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