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Denis Chernykh, Natalia Shakhova, Vladimir Yusupov, Elena Gershelis, Boris Morgunov and Igor Semiletov
This paper presents the results of an acoustic survey carried out from the fast ice in the shallow waters of the East Siberian Arctic Shelf (ESAS) using a single beam echosounder. The aim of this paper is to demonstrate an improved approach to study seaf...
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Leopold I. Lobkovsky, Alexey A. Baranov, Igor A. Garagash, Mukamay M. Ramazanov, Irina S. Vladimirova, Yurii V. Gabsatarov, Dmitry A. Alekseev and Igor P. Semiletov
A correlation is observed between changes in the level of Earth?s seismic activity and increments of the atmospheric methane concentration over the past 40 years. Trigger mechanisms are proposed for methane emissions and glacier collapse in polar regions...
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Irina Pipko, Svetlana Pugach, Igor Semiletov and Oleg Konstantinov
The East Siberian Sea (ESS) is a large and the shallowest part of the Arctic Ocean. It is characterized by high biogeochemical activity, but the seawater carbonate system remains understudied, especially during the late autumn season. Data from the resea...
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Artem A. Krylov, Mikhail A. Novikov, Sergey A. Kovachev, Konstantin A. Roginskiy, Dmitry A. Ilinsky, Oleg Yu. Ganzha, Vladimir N. Ivanov, Georgy K. Timashkevich, Olga S. Samylina, Leopold I. Lobkovsky and Igor P. Semiletov
This paper is devoted to the features of seismological observations in the Arctic seas, which are complicated by harsh climatic conditions, the presence of ice cover, stamukhi and icebergs, and limited navigation. Despite the high risk of losing expensiv...
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Victor Dyomin, Igor Semiletov, Denis Chernykh, Elena Chertoprud, Alexandra Davydova, Nikolay Kirillov, Olga Konovalova, Alexey Olshukov, Aleksandr Osadchiev and Igor Polovtsev
The paper presents the results of in situ studies of marine particles of different nature using a submersible digital holographic camera (DHC) during the Arctic expedition. It also describes the features, performance specifications, and possibilities of ...
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Alexander Ulyantsev, Natalya Polyakova, Ivan Trukhin, Yulia Parotkina, Oleg Dudarev and Igor Semiletov
This paper emphasises an ionic composition of the pore water of bottom sediments and subsea permafrost as an indicator of salinization of the thawed strata. Based on measurements of concentration of sodium (Na+), potassium (K+), calcium (Ca2+), and magne...
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Andrey A. Grinko, Ivan V. Goncharov, Nikolay V. Oblasov, Elena V. Gershelis, Michail V. Shaldybin, Natalia E. Shakhova, Alexey G. Zarubin, Alexey S. Ruban, Oleg V. Dudarev, Maxim A. Veklich, Alexey K. Mazurov and Igor P. Semiletov
The article provides new data about characteristics of the organic matter and mineralogical composition of the Cape Muostakh sediments related to intense permafrost degradation (thermoerosion processes). The sedimentary material has been investigated by ...
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Denis Chernykh, Vladimir Yusupov, Aleksandr Salomatin, Denis Kosmach, Natalia Shakhova, Elena Gershelis, Anton Konstantinov, Andrey Grinko, Evgeny Chuvilin, Oleg Dudarev, Andrey Koshurnikov and Igor Semiletov
Seeps found offshore in the East Siberian Arctic Shelf may mark zones of degrading subsea permafrost and related destabilization of gas hydrates. Sonar surveys provide an effective tool for mapping seabed methane fluxes and monitoring subsea Arctic perma...
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Natalia Shakhova, Igor Semiletov and Evgeny Chuvilin
This paper summarizes current understanding of the processes that determine the dynamics of the subsea permafrost?hydrate system existing in the largest, shallowest shelf in the Arctic Ocean; the East Siberian Arctic Shelf (ESAS). We review key environme...
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Evgeny Chuvilin, Valentina Ekimova, Boris Bukhanov, Sergey Grebenkin, Natalia Shakhova and Igor Semiletov
Destabilization of intrapermafrost gas hydrate is one possible reason for methane emission on the Arctic shelf. The formation of these intrapermafrost gas hydrates could occur almost simultaneously with the permafrost sediments due to the occurrence of a...
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