Spatial variations of methane distribution in marine environment and its fluxes at the water–atmosphere interface in the western Sea of Okhotsk

Mishukova, G. I.; Shakirov, R. B.

doi:10.1134/s0097807817040133

Cited by 6 publications

(2 citation statements)

References 7 publications

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“…Мишукова и Р.Б. Шакиров [9] сообщили о таком же наличии этилена в поверхностных образцах осадочных пород в Охотском море, что свидетельствует о возможной интенсивной бактериальной активности в поверхностных донных отложениях исследуемого района.…”

Section: распределение углеводородных газов и нефтегазовый потенциалunclassified

Distribution of Gases in Bottom Sediments of the Southwestern Sub-Basin of the South China Sea (Bien Dong)

Luong¹,

Obzhirov²,

Hoàng³

et al. 2021

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For the first time, this paper presents the distribution of gases (CO2, hydrocarbon C1-C4, H2, He) in 39 gas samples in bottom sediments from 19 gravity cores located in the southwestern sub-basin of the South China Sea (known as Bien Dong). The surface sediments in the studied area are mostly silty clay. In general, the concentration of methane varies in a wide range of 0.5–440 ppm. Anomalous values of methane were detected at many locations along the slope area of the southwest sub-basin of the South China Sea. The value of 2.2 ppm could be considered as a background concentration of methane in the studied region. The presence of a large-scale degassing zone of methane in the studied area was proposed. Besides, heavy hydrocarbon gases (ethylene, ethane, propane, and butane) were also determined with the highest values up to 70 ppm, 124 ppm, and 50 ppm for ethylene, ethane and propane, respectively. In addition, data of carbon dioxide, hydro and helium suggest some anomalous values of H2 up to 56.7 ppm.

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Section: распределение углеводородных газов и нефтегазовый потенциалunclassified

Distribution of Gases in Bottom Sediments of the Southwestern Sub-Basin of the South China Sea (Bien Dong)

Luong¹,

Obzhirov²,

Hoàng³

et al. 2021

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“…The preliminary studies, covering major part of one of the largest East Asian lineaments, the socalled sub-longitudinal Okhotsk-Japan Sea lineament, demonstrate various forms of degassing hydrocarbon accumulations, namely hydrocarbon deposits, surface, and underwater gas-fluid phenomena (over 1000 torches by 2017), gas hydrates, mud volcanoes, water-gas and geothermal sources, and anomalous gas-geochemical fields (Mishukova and Shakirov 2017;Shakirov et al 2017). The highest natural oceanic upward flux of methane (torch) F1 with over 2000 m height (46°1.99N -144°15.25 ′ E, depth 2220 m, with a flow rate up to 5 mol/s) was recorded in 2012 at the western part of the Kuril depression (Russian-Japan-Korean Sakhalin Slope Gas Hydrates (SSGH) Program, e.g.…”

Section: How Much Methane Is Degassing From the Seas?mentioning

confidence: 99%

Research agenda for the Russian Far East and utilization of multi-platform comprehensive environmental observations

Petäj̈ä

Ганзей

Lappalainen

et al. 2020

International Journal of Digital Earth

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The Russian Far East is a region between China and the Russian Arctic with a diverse climatological, geophysical, oceanic, and economical characteristic. The southern region is located in the Far East monsoon sector, while the northern parts are affected by the Arctic Ocean and cold air masses penetrating far to the south. Growing economic activities and traffic connected to the China Belt and Road Initiative together with climate change are placing an increased pressure upon the Russian Far East environment. There is an urgent need to improve the capacity to measure the atmospheric and environmental pollution and analyze their sources and to quantify the relative roles of local and transported pollution emissions in the region. In the paper, we characterize the current environmental and socio-economical landscape of the Russian Far East and summarize the future climate scenarios and identify the key regional research questions. We discuss the research infrastructure concept, which is needed to answer the identified research questions. The integrated observations, filling in the critical observational gap at the Northern Eurasian context, are required to provide state-of-the-art observations and enable follow-up procedures that support local, regional, and global decision making in the environmental context.

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Interseasonal Variability in Methane Concentrations and Fluxes at the Water–Atmosphere Boundary in the Western Sea of Okhotsk

et al. 2019

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Spatial variations of methane distribution in marine environment and its fluxes at the water–atmosphere interface in the western Sea of Okhotsk

Cited by 6 publications

References 7 publications

Distribution of Gases in Bottom Sediments of the Southwestern Sub-Basin of the South China Sea (Bien Dong)

Distribution of Gases in Bottom Sediments of the Southwestern Sub-Basin of the South China Sea (Bien Dong)

Research agenda for the Russian Far East and utilization of multi-platform comprehensive environmental observations

Interseasonal Variability in Methane Concentrations and Fluxes at the Water–Atmosphere Boundary in the Western Sea of Okhotsk

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