Escape of methane gas from the seabed along the West Spitsbergen continental margin
Escape of methane gas from the seabed along the West Spitsbergen continental margin
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DOI：
10.1029/2009gl039191
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发表时间：
2009-08
影响因子：
5.2
通讯作者：
G. Westbrook;K. Thatcher;E. Rohling;A. Piotrowski;H. Pälike;Anne H. Osborne;E. Nisbet;T. Minshull;M. Lanoisellé;R. James;V. Hühnerbach;D. Green;R. Fisher;A. J. Crocker;A. Chabert;C. Bolton;A. Beszczynska-Möller;C. Berndt;Alfred Aquilina
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文献类型：
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作者：
G. Westbrook;K. Thatcher;E. Rohling;A. Piotrowski;H. Pälike;Anne H. Osborne;E. Nisbet;T. Minshull;M. Lanoisellé;R. James;V. Hühnerbach;D. Green;R. Fisher;A. J. Crocker;A. Chabert;C. Bolton;A. Beszczynska-Möller;C. Berndt;Alfred Aquilina
在天然气水合物稳定带（GHSZ）目前的上限上，在西斯匹次卑尔根大陆边缘的海床上，在150-400米的深度范围内发现了250多个气泡柱。一些羽流向上延伸到海面50米以内。这种气体主要是甲烷。在过去的30年里，向北流动的西斯匹次卑尔根海流变暖了1°C，这很可能通过减少GHSZ的范围，导致甲烷从分解的水合物中释放出来，从而增加了海底甲烷的释放。如果这一过程在北极大陆边缘广泛传播，每年将有数十太克的甲烷被释放到海洋中。
More than 250 plumes of gas bubbles have been discovered emanating from the seabed of the West Spitsbergen continental margin, in a depth range of 150–400 m, at and above the present upper limit of the gas hydrate stability zone (GHSZ). Some of the plumes extend upward to within 50 m of the sea surface. The gas is predominantly methane. Warming of the northward‐flowing West Spitsbergen current by 1°C over the last thirty years is likely to have increased the release of methane from the seabed by reducing the extent of the GHSZ, causing the liberation of methane from decomposing hydrate. If this process becomes widespread along Arctic continental margins, tens of Teragrams of methane per year could be released into the ocean.