Methane hydrate emergence from Lake Baikal: direct observations, modelling, and hydrate footprints in seasonal ice cover
Methane hydrate emergence from Lake Baikal: direct observations, modelling, and hydrate footprints in seasonal ice cover
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贝加尔湖的甲烷水合物的出现：季节性冰盖中的直接观测、建模和水合物足迹
DOI：
10.1038/s41598-019-55758-8
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发表时间：
2019
影响因子：
4.6
通讯作者：
R. Gnatovsky
中科院分区：
文献类型：
--
作者：
N. Granin ;I. Aslamov;V. Kozlov;M. Makarov;G. Kirillin;K. Kucher;V. Blinov;V. Ivanov;I. Mizandrontsev;A. Zhdanov;A. Anikin;M. Granin;R. Gnatovsky
本文提供了一份关于甲烷水合物从贝加尔湖底部沉积物上升到湖面的新报告，并通过照片和视频记录进行了验证。水声数据证实了水合物在水柱中的上升，显示上升物体的速度明显超过气泡的典型速度(18-25 cm S−1)。推定的甲烷水合物的数学模型以及速度和深度估计与从回波图中观察到的值相吻合。模拟结果还表明，在夏季水柱温度条件下，初始半径为2.5 cm或更大的甲烷水合物碎片可以到达贝加尔湖表面。结果进一步表明，虽然从深层沉积储集层释放的甲烷气泡会在贝加尔湖水柱中溶解，但以水合物形式运输不仅是可行的，而且可能是以前被忽视的地表甲烷来源，随后排放到大气中。在冰盖中捕获的甲烷水合物也可能导致贝加尔湖周围观察到的独特的冰结构和形态的形成。对这些冰结构的采样检测到甲烷含量超过了在周围冰层和大气中测量的浓度，表明了与这里描述的甲烷运输过程的联系。
This paper provides a novel report of methane hydrates rising from bottom sediments to the surface of Lake Baikal, validated by photo and video records. The ascent of hydrates in the water column was confirmed by hydroacoustic data showing rising objects with velocities significantly exceeding the typical speeds (18–25 cm s−1) of gas bubbles. Mathematical modelling along with velocity and depth estimates of the presumed methane hydrates coincided with values observed from echograms. Modelling results also showed that a methane hydrate fragment with initial radius of 2.5 cm or greater could reach the surface of Lake Baikal given summer water column temperature conditions. Results further show that while methane bubbles released from the deep sedimentary reservoir would dissolve in the Lake Baikal water column, transport in hydrate form is not only viable but may represent a previously overlooked source of surface methane with subsequent emissions to the atmosphere. Methane hydrates captured within the ice cover may also cause the formation of unique ice structures and morphologies observed around Lake Baikal. Sampling of these ice structures detected methane content that exceeded concentrations measured in surrounding ice and from the atmosphere demonstrating a link with the methane transport processes described here.
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影响因子：
0.9
作者：
N. Granin;N. Radziminovich;K. Kucher;V. V. Chechel’nitskii
通讯作者：
V. V. Chechel’nitskii
DOI：
10.1073/pnas.1110716108
发表时间：
2011-12-06
影响因子：
11.1
作者：
Grossart, Hans-Peter;Frindte, Katharina;Tang, Kam W.
通讯作者：
Tang, Kam W.
2008 年 8 月 Mw6.2 库尔图克地震引发贝加尔湖近湖底水域的净化
影响因子：
2.1
作者：
N. Granin;N. Radziminovich;L. Granina;V. Blinov;R. Y. Gnatovskiy
通讯作者：
R. Y. Gnatovskiy
贝加尔湖甲烷的来源和汇：测量和建模的综合
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
Martin Schmid;M. Batist;N. Granin;V. Kapitanov;Daniel Frank Mcginnis;I. B. Mizandrontsev;Anatoly Obzhirov;A. Wüest
通讯作者：
A. Wüest
贝加尔湖底部沉积物甲烷通量的估算
影响因子：
2.1
作者：
N. Granin;S. I. Muyakshin;M. Makarov;K. Kucher;I. Aslamov;L. Granina;I. B. Mizandrontsev
通讯作者：
I. B. Mizandrontsev