Long-distance migration and venting of methane from the base of the hydrate stability zone
Long-distance migration and venting of methane from the base of the hydrate stability zone
复制标题
甲烷从水合物稳定带底部的长距离运移和喷发
DOI:
10.1038/s41561-023-01333-w
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发表时间:
2023
影响因子:
18.3
通讯作者:
Davies R
中科院分区:
文献类型:
--
作者:
Davies R
Marine methane hydrate is an ice-like substance that is stable in sediment around marine continental margins where water depths are greater than ~450–700 m. The release of methane due to melting of hydrates is considered to be a mechanism for past global carbon-cycle perturbations and could exacerbate ongoing anthropogenic climate change. Increases in bottom-water temperature at the landward limit of marine hydrate around continental margins, where vulnerable hydrate exists at or below the seabed, cause methane to vent into the ocean. However, this setting represents only ~3.5% of the global hydrate reservoir. The potential for methane from hydrate in deeper water to reach the atmosphere was considered negligible. Here we use three-dimensional (3D) seismic imagery to show that, on the Mauritanian margin, methane migrated at least 40 km below the base of the hydrate stability zone and vented through 23 pockmarks at the shelf break, probably during warmer Quaternary interglacials. We demonstrate that, under suitable circumstances, some of the 96.5% of methane bound in deeper water distal hydrates can reach the seafloor and vent into the ocean beyond the landward limit of marine hydrate. This reservoir should therefore be considered for estimating climate change-induced methane release during a warming world.
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影响因子:
6.7
作者:
S. Merle;R. Embley;H. Johnson;T. Lau;B. Phrampus;N. Raineault;L. Gee
通讯作者:
L. Gee
影响因子:
2.9
作者:
M. Riedel;L. Hähnel;J. Bialas;A. Bachmann;Stefanie Gaide;P. Wintersteller;I. Klaucke;G. Bohrmann
通讯作者:
G. Bohrmann
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
Ang Li
通讯作者:
Ang Li
影响因子:
--
作者:
V. Riboulot;A. Cattaneo;C. Scalabrin;A. Gaillot;G. Jouet;Grégory Ballas;T. Marsset;S. Garziglia;S. Ker
通讯作者:
S. Ker
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
R. Davies;Jinxiu Yang;R. Hobbs;Ang Li
通讯作者:
Ang Li