Abstract
In the north of the shallow East Siberian Arctic Shelf (the Laptev and East Siberian seas), based on CDP (common depth point) seismic data for 71 lines with total length of 15 630 km, velocities of refracted waves propagation in the upper part of the section were studied. Fundamentally new information was obtained on the state of the shelf permafrost and significant decrease of the zone of possible occurrence of frozen ground and methane hydrates was substantiated. Based on the comprehensive analysis of areas of subsea frozen ground degradation in the Laptev, East Siberian, Chukchi and Beaufort seas, the low probability of a significant contribution of methane, released due to gas hydrates dissociation, to global climate change was substantiated.
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ACKNOWLEDGMENTS
We are grateful to anonymous reviewers for useful comments that made it possible to improve this paper.
Funding
The research was carried out according to the state assignment of the Oil and Gas Research Institute, Russian Academy of Sciences on the topic “Improving the efficiency and environmental safety of the oil and gas resources development in the Arctic and Subarctic zones of the Earth in a changing climate” (No. 122022800264-9).
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Translated by E. Maslennikova
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Bogoyavlensky, V.I., Kishankov, A.V. & Kazanin, A.G. Permafrost and Gas Hydrates on the East Siberian Arctic Shelf. Dokl. Earth Sc. 507, 946–951 (2022). https://doi.org/10.1134/S1028334X22600578
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DOI: https://doi.org/10.1134/S1028334X22600578