Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL089906 |
Irregular BSR: Evidence of an Ongoing Reequilibrium of a Gas Hydrate System | |
F. Colin; S. Ker; V. Riboulot; N. Sultan | |
2020-09-30 | |
发表期刊 | Geophysical Research Letters
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出版年 | 2020 |
英文摘要 | Gas hydrate (GH) systems constitute methane sinks sensitive to environmental changes such as pressure, temperature, and salinity. It remains a matter of debate as to whether the large GH system of the Black Sea has reached a steady state since the last glacial maximum (LGM). We report on an irregular free gas distribution in specific sediment layers marking an irregular bottom‐simulating reflector (BSR). This anomalous free gas distribution revealed by very high resolution seismic images, acquired by a deep‐towed multichannel seismic system, might be evidence of an on‐going migration of the base of the GH stability zone (GHSZ). We show that the reequilibrium is not occurring homogeneously as overpressure from hydrate dissociation slows their decomposition in specific sedimentary layers. The Black Sea example highlights that dissociation and the associated methane release in the water column or even in the atmosphere could be largely delayed by overpressure accumulation. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/297826 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | F. Colin,S. Ker,V. Riboulot,et al. Irregular BSR: Evidence of an Ongoing Reequilibrium of a Gas Hydrate System[J]. Geophysical Research Letters,2020. |
APA | F. Colin,S. Ker,V. Riboulot,&N. Sultan.(2020).Irregular BSR: Evidence of an Ongoing Reequilibrium of a Gas Hydrate System.Geophysical Research Letters. |
MLA | F. Colin,et al."Irregular BSR: Evidence of an Ongoing Reequilibrium of a Gas Hydrate System".Geophysical Research Letters (2020). |
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