Extensive Methane Venting to the Atmosphere from Sediments of the East Siberian Arctic Shelf

被引：400

作者：

Shakhova, Natalia ^{[1
,2
]}

Semiletov, Igor ^{[1
,2
]}

Salyuk, Anatoly ^{[2
]}

Yusupov, Vladimir ^{[2
]}

Kosmach, Denis ^{[2
]}

Gustafsson, Orjan ^{[3
,4
]}

机构：

[1] Univ Alaska, Int Arctic Res Ctr, Fairbanks, AK 99709 USA

[2] Russian Acad Sci, Far Eastern Branch, Pacific Oceanol Inst, Vladivostok 690041, Russia

[3] Stockholm Univ, Bert Bolin Ctr Climate Res, S-10691 Stockholm, Sweden

[4] Stockholm Univ, Dept Appl Environm Sci, S-10691 Stockholm, Sweden

来源：

SCIENCE | 2010年 / 327卷 / 5970期

基金：

俄罗斯基础研究基金会; 美国海洋和大气管理局; 瑞典研究理事会;

关键词：

PERMAFROST; EXCHANGE; ECOSYSTEMS; RELEASE; FLUX; THAW;

D O I：

10.1126/science.1182221

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Remobilization to the atmosphere of only a small fraction of the methane held in East Siberian Arctic Shelf (ESAS) sediments could trigger abrupt climate warming, yet it is believed that sub-sea permafrost acts as a lid to keep this shallow methane reservoir in place. Here, we show that more than 5000 at-sea observations of dissolved methane demonstrates that greater than 80% of ESAS bottom waters and greater than 50% of surface waters are supersaturated with methane regarding to the atmosphere. The current atmospheric venting flux, which is composed of a diffusive component and a gradual ebullition component, is on par with previous estimates of methane venting from the entire World Ocean. Leakage of methane through shallow ESAS waters needs to be considered in interactions between the biogeosphere and a warming Arctic climate.

引用

页码：1246 / 1250

页数：5

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