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Gas hydrate stability condition on the NE Sakhalin continental slope, Okhotsk Sea.

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Title
Gas hydrate stability condition on the NE Sakhalin continental slope, Okhotsk Sea.
Other Titles
오호츠크해 북동사할린 대륙사면의 가스하이드레이트 안정조건
Authors
Kim, Young-Gyun
B. Baranov
Hong, Jong Kuk
Jin, Young Keun
A. Obzhirov
H. Shoji
Keywords
BSR; GHSZ; Gas hydrate; Okhotsk Sea
Issue Date
2010
Citation
Kim, Young-Gyun, et al. 2010. Gas hydrate stability condition on the NE Sakhalin continental slope, Okhotsk Sea.. 10th International Conference on Gas in Marine Sediments, Listvyanka, Lake Baikal, Russia. 10th International Conference on Gas in Marine Sediments, Listvyanka, Lake Baikal, Russia. 2010.09.08~.
Abstract
The northeastern Sakhalin continental slope (NESS), Okhotsk Sea is characterized by an abundant occurrence of gas hydrate. Multidisciplinary surveys have been carried out to investigate gas hydrate accumulation on the NESS under the frameworks of Korea-Russia-Japan international projects (CHAOS and SSGH) since 2003. The Okhotsk Sea is one of the southernmost ice-covered seas in the Northern Hemisphere where winter sea ice covers up to 85% of the area. Cold water temperature (~ 0° C below the 150 m water depth) makes top of the gas hydrate stability zone (TGHSZ) remarkably shallow. The bottom simulating reflectors on the seismic profiles clearly merge with the seafloor at 300 m water depth that is theoretically expected. Gas flares in the water column appear to persist above 300 m water depth. Gas hydrates have been sampled on the seafloor at water depths of 385 m and 390 m in 2005, which would be the shallowest hydrate ever sampled in the area. As such a shallow TGHSZ should be easily unstable by changes in stability condition like sea-level fall or rise, the Okhotsk Sea is the promising area to study methane transfer from gas hydrate system to atmosphere through ocean which could cause global warming.
URI
http://repository.kopri.re.kr/handle/201206/8064
Conference Name
10th International Conference on Gas in Marine Sediments, Listvyanka, Lake Baikal, Russia
Conference Place
10th International Conference on Gas in Marine Sediments, Listvyanka, Lake Baikal, Russia
Conference Date
2010.09.08~
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