Dangerous gas-saturated objects in the World Ocean: the East Siberian Sea

Bogoyavlensky, V.I.; Kishankov, A.V.; Kazanin, A.G.; Kazanin, G.A.

doi:10.25283/2223-4594-2022-2-158-171

Cited by 4 publications

(12 citation statements)

References 18 publications

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“…In areas of distribution of weakly consolidated rocks of the upper part of sedimentary cover, the registration of high-velocity refracted waves indicates the presence of frozen ground and/or GHs, having similar physical characteristics [13; 14]. A similar analysis was carried out previously for the Canadian and American sectors of the Beaufort Sea [17; 18], as well as by the authors in previous studies of the Laptev and East Siberian seas [21][22][23][24][25][26][27].…”

Section: Methods and Materials Of The Researchmentioning

confidence: 56%

“…As a result of the research for the Laptev Sea, we conducted the analysis of field CDP seismic data in a total volume of 20.71 thousand km acquired by JSC MAGE in several areas, as well as along separate regional seismic lines, including: Thus, in addition to the processing of 28 seismic lines of the Central Laptev area (CL) and the line A4, carried out in 2021-2022 [21][22][23][24][25], in this research, 14.12 thousand km of 84 new seismic lines in the Laptev Sea were processed. Besides, for understanding the regional setting in the north-eastern part of the Laptev Sea, two seismic lines from the adjacent area of the De Long High in the north-western part of the East Siberian Sea were included in the research [26; 27].…”

Section: Results Of the Researchmentioning

confidence: 99%

“…The main characteristics of the surveys are given in Table . 1. More detail information is given in [21][22][23].…”

Section: Methods and Materials Of The Researchmentioning

confidence: 99%

“…In 2018, we made a forecast of the potential GH distribution in the areas of the Circum-Arctic region with the main focus on the Arctic Ocean, on the shallow (up to 120 m) shelf of which, in zones of existence of subsea permafrost, thermobaric conditions exist for occurrence of GHs, often called as cryogenic GHs [19; 20]. In subsequent years, the causes of active gas emission in the Laptev Sea were analyzed [21] and dangerous gas-saturated objects in the East Siberian Sea were studied [22]. At the same time, the first stage of research was conducted aimed at analysis of approximate position of the boundary of subsea frozen ground distribution in the seas of Eastern Siberia based on analysis of seismic data from JSC Marine Arctic Geological Expedition (JSC MAGE) [23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

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Distribution of subsea permafrost (frozen ground) in the Laptev Sea based on seismic refraction data

Bogoyavlensky,

Kishankov,

Kazanin

2023

AEE

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For the first time, for an area of 454 thousand km2 of the Laptev Sea, processing and comprehensive analysis of a large volume of records of the first arrivals of refracted waves of common shot gathers was carried out along 113 CDP seismic lines of JSC MAGE with a total length of about 20.7 thousand km. Fundamentally new information was obtained on the state of the subsea cryolithozone, and the boundary between the predominant distribution of frozen (Southern zone) and thawed (Northern zone) ground was identified. It was substantiated that a number of identified through taliks in the Southern zone have an endogenous genesis and are associated with large disjunctive displacements. High seismic activity in the central part of the Laptev Sea improves faults permeability, which contributes to the activation of subvertical migration of deep fluid flows and enhances the role of the endogenous factor in the degradation of permafrost (frozen ground) and gas hydrates. A large thawed zone was discovered in the North Western area of JSC MAGE activities, approaching close to the coast of Taimyr. A comparison of the results obtained with the data of the stratigraphic well DL-1, drilled in 2022 by FSBI VSEGEI and JSC Rosgeologia near the eastern border of the Laptev Sea, showed their complete correspondence, clearly indicating completed degradation of subsea permafrost in a significant part of the seas of Eastern Siberia.

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Section: Methods and Materials Of The Researchmentioning

confidence: 56%

Section: Results Of the Researchmentioning

confidence: 99%

“…The main characteristics of the surveys are given in Table . 1. More detail information is given in [21][22][23].…”

Section: Methods and Materials Of The Researchmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Distribution of subsea permafrost (frozen ground) in the Laptev Sea based on seismic refraction data

Bogoyavlensky,

Kishankov,

Kazanin

2023

AEE

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“…№ 2 повышения эффективности съемки рельефа дна в районах слабой гидрографической изученности с использованием МЛЭ даны в работе [45]. Другим источником информации о рельефе дна новой высокоширотной трассы СМП в Восточно-Сибирском море могут служить результаты морских геофизических работ, которые были выполнены здесь в последние годы, например [46].…”

Section: обсуждение (Discussion)unclassified

Cartographic support issues in the Arctic Ocean studying and bathymetric investigation objectives in the Russian Arctic

Firsov,

Zinchenko

2023

jour

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The current state and issues of the bathymetric investigations of the Arctic Ocean are examined in the study. The main sources of bathymetric data in the Central Arctic region and Arctic seas are characterized. The main possibilities to solve these issues in order to improve the efficiency of oncoming bathymetric investigation in the Russian Arctic sector for solving the urgent practical and scientific tasks of the Russian Federation in the Arctic region are discussed. The problem of hydrographic investigation and marine cartography of the new high latitude routes in the Northern Sea Route and bathymetric investigations of the South-Eastern part of Gakkel Ridge which are important for the Russian extended continental shelf submission is covered as one of the main issues. The importance of a new hydrographic investigation at the high latitude routes in the East Siberian Sea in order to provide the possibility of year-round navigation for the large-tonnage Arc7‑class icebreaking liquefied natural gas carriers is especially emphasized. The questions of geoformation and ice satellite support for efficient navigation along the Northern Sea Route are considered. It is concluded that the poor hydrographic knowledge of the new high latitude route in the East Siberian Sea and the lack of electronic navigation charts will prevent the possibility of establishing the year-round navigation for Arc7‑class icebreaking liquefied natural gas carriers during the coming several years. It is stated that hydrographic investigations carried out on the sections of the Northern Sea Route must adhere to the requirements of the International Hydrographic Organization. The urgency of developing the state integrated bathymetric database for the Arctic Ocean including the arctic seas data along with the necessity of providing all Russian bathymetric data acquired in the Arctic region to the assigned national center is discussed. The FKU 280 ZKP VMF is proposed as such national center. The importance of bathymetric maps of the Arctic Ocean is noted. The main role of creating the electronic bathymetric maps using modern technology and analytical geomorphological mapping on the basis of the system-oriented morphological approach in Earth science is emphasised.

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The tasks for bathymetric investigations and cartographic support of the northern sea high latitude routes in the East Siberian Sea

Firsov,

Pozenkova

2023

jour

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The current state and issues of bathymetric investigations of the East Siberian Sea are examined in this study. The main sources of bathymetric data are characterized. The possibilities to solve these issues in order to improve the efficiency of the oncoming bathymetric investigation in the East Siberian Sea for supporting the urgent practical tasks of the Russian Federation concerning the Northern Sea high latitude routes are discussed. The importance of a new hydrographic investigation through the high latitude routes in the East Siberian Sea in order to provide the possibility of year-round navigation of the large-tonnage Arc7‑class icebreaking LNG carriers is especially emphasized. Compiling of the new coastal electronic navigation charts for the new Northern Sea high latitude routes is stated as one of the main priorities. The lack of coastal electronic navigation charts of the high latitude routes in the East Siberian Sea will present a challenge for the establishing of year-round navigation for high ice-capable Arc7‑class LNG carriers during the coming several years. The drafting of high latitude routes must also consider the seafloor gas venting in the East Siberian Sea. The satellite remote sensing data from passive microwave radiometers and optical sensors using «modis & amsr2» technology provided by the University of Bremen ensures the complementary observations of sea ice concentration in the eastern part of the East Siberian Sea. The re-analysis of data from microwave radiometers AMSR‑2 beginning from 2018 provides the conclusion about the autumn degradation of the Aion ice massif. The analysis of the sea-ice concentration of the Aion ice massif during autumn–winter of 2022, the most severe in the last 5 years, allows us to give a recommendation concerning the new high latitude route in the East Siberian Sea. This route passes along the northern coast of Vrangel island into the Chukchi Sea and it is more efficient for large-tonnage Arc7‑class icebreaking LNG carriers ensuring year-round navigation in the East Siberian Sea. It is stated that hydrographic investigations carried out on the sections of the Northern Sea Route must adhere to the requirements of the International Hydrographic Organization. The urgency of developing the state integrated bathymetric database for the Arctic Ocean including the Arctic Seas data along with the necessity of providing all Russian bathymetric data acquired in the Arctic region to the assigned national centre is discussed. The FKU 280 ZKP VMF is proposed as such national centre. The importance of coastal electronic navigation charts for the high latitude routes in the East Siberian Sea created on the basis of modern technology is emphasized.

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Dangerous gas-saturated objects in the World Ocean: the East Siberian Sea

Cited by 4 publications

References 18 publications

Distribution of subsea permafrost (frozen ground) in the Laptev Sea based on seismic refraction data

Distribution of subsea permafrost (frozen ground) in the Laptev Sea based on seismic refraction data

Cartographic support issues in the Arctic Ocean studying and bathymetric investigation objectives in the Russian Arctic

The tasks for bathymetric investigations and cartographic support of the northern sea high latitude routes in the East Siberian Sea

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