Dynamics of gas hydrates in polar marine environments.

极地海洋环境中天然气水合物的动力学。

• 批准号: NE/D005779/1
• 负责人: Christian Berndt
• 金额: $ 22.18万
• 依托单位: Royal Holloway University of London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2007
• 资助国家: 英国
• 起止时间: 2007 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FD005779%2F1
• 关键词: Dynamics; gas; hydrates; polar; marine

Almost half of the Earth's carbon is stored in gas hydrates and related shallow gas deposits. Numerical models predict that this reservoir is highly mobile and that escaping gas has a significant potential to accelerate climate change releasing as much as 2000 Gt of methane over a short period of time. As methane is a potent greenhouse gas it would course further global warming. Arctic gas hydrates are most vulnerable to future climate change because (1) it is predicted that temperatures will increase faster in the Arctic than in low latitudes (2) the intercept of the gas hydrate stability zone with the seabed is within the reach of fast warming surface waters and (3) the water column above the vulnerable zone of gas hydrates is smaller than in warmer oceans facilitating more efficient transport of greenhouse gases to the atmosphere. We propose an interdisciplinary consortium to quantify the present amount of gas hydrates through seismic methods, to measure current methane flux from the seabed to the atmosphere, to detect the effects of postglacial warming on the gas hydrate system, and to predict the effect of a range of future temperature changes on the gas hydrates. This information will allow a detailed assessment of the mobility of Arctic gas hydrates and it will significantly decrease the uncertainties involved in climate modelling.

地球上几乎一半的碳储存在天然气水合物和相关的浅层天然气矿藏中。数值模型预测，该储层具有高度流动性，逸出的气体极有可能加速气候变化，在短时间内释放多达 2000 Gt 的甲烷。由于甲烷是一种强效温室气体，它会进一步加剧全球变暖。北极天然气水合物最容易受到未来气候变化的影响，因为（1）预计北极地区的气温上升速度将比低纬度地区更快（2）天然气水合物稳定区与海底的截距处于快速变暖的表层水域的范围内，以及（3）天然气水合物脆弱区上方的水柱比温暖海洋中的水柱小，有利于温室气体更有效地输送到大气中。我们提议成立一个跨学科联盟，通过地震方法量化当前天然气水合物的数量，测量当前从海底到大气的甲烷通量，检测冰后变暖对天然气水合物系统的影响，并预测未来一系列温度变化对天然气水合物的影响。这些信息将有助于对北极天然气水合物的流动性进行详细评估，并将显着减少气候建模中涉及的不确定性。

项目成果

Escape of methane gas from the seabed along the West Spitsbergen continental margin

• DOI: 10.1029/2009gl039191
• 发表时间: 2009-08
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 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

Switching of a paleo-ice stream in northwest Svalbard

• DOI: 10.1016/j.quascirev.2011.03.013
• 发表时间: 2011-06
• 期刊: Quaternary Science Reviews
• 影响因子: 4
• 作者: S. Sarkar;C. Berndt;A. Chabert;D. Masson;T. Minshull;G. Westbrook

Seismic evidence for shallow gas-escape features associated with a retreating gas hydrate zone offshore west Svalbard

与斯瓦尔巴群岛西部近海后退的天然气水合物带相关的浅层气体逃逸特征的地震证据

• DOI: 10.1029/2011jb009126
• 发表时间: 2012
• 期刊: Solid Earth
• 影响因子: 3.4
• 作者: Sarkar S

Characterization of a stratigraphically constrained gas hydrate system along the western continental margin of Svalbard from ocean bottom seismometer data

• DOI: 10.1029/2011jb008211
• 发表时间: 2011-12-10
• 期刊: JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
• 影响因子: 3.9
• 作者: Chabert, Anne;Minshull, Tim A.;Sarkar, Sudipta
• 通讯作者: Sarkar, Sudipta