A5040816721- Methane Hydrates and Related Phenomena
- Arctic and Antarctic ice dynamics
- Geological Studies and Exploration
- Climate change and permafrost
- Oceanographic and Atmospheric Processes
- Ocean Acidification Effects and Responses
- Atmospheric and Environmental Gas Dynamics
- Marine and coastal ecosystems
- Arctic and Russian Policy Studies
- Marine and environmental studies
- Aquatic and Environmental Studies
- Geology and Paleoclimatology Research
- Food Industry and Aquatic Biology
V.I. Il'ichev Pacific Oceanological Institute
2016-2023
Far Eastern Branch of the Russian Academy of Sciences
2019-2023
National Research Tomsk State University
2023
Russian Academy of Sciences
2008-2017
The Kara and Laptev seas receive about one half of total freshwater runoff to the Arctic Ocean from Ob, Yenisei, Lena rivers. Discharges these large rivers form freshened surface water masses over wide areas in seas. These masses, i.e., Ob-Yenisei river plumes, generate an eastward buoyancy boundary current that accounts for large-scale zonal transport along Siberian part Ocean. In this study we investigate spreading plume Sea through Vilkitsky Strait East-Siberian Sannikov straits during...
Abstract. It has been suggested that increasing terrestrial water discharge to the Arctic Ocean may partly occur as submarine groundwater (SGD), yet there are no direct observations of this phenomenon in shelf seas. This study tests hypothesis SGD does exist Siberian Shelf seas, but its dynamics be largely controlled by complicated geocryological conditions such permafrost. The field-observational approach southeastern Laptev Sea used a combination hydrological (temperature, salinity),...
Abstract. The Yenisei and Khatanga rivers are among the largest estuarine that inflow to Arctic Ocean. Discharge of River is 1 order magnitude larger than River. However, spatial scales buoyant plumes formed by freshwater runoff from gulfs similar. This feature caused different tidal forcing in these estuaries, which have similar sizes, climate conditions, geomorphology. discharge experiences strong causes formation a diluted bottom-advected plume Gulf. deep weakly stratified has small...
This work is focused on the structure and inter-annual variability of freshened surface layer (FSL) in Laptev East-Siberian seas during ice-free periods. formed mainly by deltaic rivers among which Lena River contributes about two thirds inflowing freshwater volume. Based situ measurements, we show that area this FSL certain years much greater than neighboring Kara Sea, while total annual discharge to 1.5 times less Sea (mainly from estuaries Ob Yenisei rivers). feature caused differences...
The inflow of warm and saline Atlantic water from the North to Western Arctic is provided by two branches, namely, Fram Strait branch Barents Sea water. pathways these branches merge at St. Anna Trough, then both propagate eastward along continental slope, albeit different depths. As a result, local interaction between in trough affects properties large-scale flow Eastern deep basins. In this study, we report extensively situ measurements with high spatial coverage (56 hydrological stations...
The Kara Sea receives ~ 1/3 of total freshwater discharge to the Arctic Ocean, mainly from large Ob and Yenisei rivers. Ob-Yenisei plume covers wide area in central part during ice-free season (June-October) accumulates 1000 km3 volume. In late autumn, becomes covered by ice, which hinders situ measurements at this area. As a result, fate below sea ice winter spring remains unclear. study, we report multiple performed shortly before ice-covered season. We demonstrate that autumn convection...
The major Siberian rivers form large river plumes in the Arctic Ocean, which govern structure of sea surface layer at shelf. These were explicitly studied during warm period summer and early autumn characterized by high runoff ice-free conditions. However, little is known about processes, occur within these beginning cold season, i.e., late shortly before ice formation. In this study, we report situ measurements performed Kara Sea October 2020, 2021, 2022. We reveal that intense convection...
Abstract. The Arctic is undergoing dramatic changes which cover the entire range of natural processes, from extreme increases in temperatures air, soil, and water, to cryosphere, biodiversity waters, land vegetation. Small largest marine carbon pool, dissolved inorganic can have a profound impact on dioxide (CO2) flux between ocean atmosphere, feedback this climate. Knowledge relevant processes seas improves evaluation projection cycle dynamics under current conditions rapid climate change....
Abstract. It has been suggested that increasing freshwater discharge to the Arctic Ocean may also occur as submarine groundwater (SGD), yet there are no direct observations of this phenomenon in shelf seas. This study tests hypothesis SGD does exist Siberian-Arctic seas but its dynamics be largely controlled by complicated geocryological conditions such permafrost. The field-observational approach southeast Laptev Sea used a combination hydrological (temperature, salinity), geological...
Relevance. Gas flares or seeps consisting of bubbles continuously rising from the seabed have been recorded throughout World Ocean at depths ranging several meters to three kilometers more. Measurements gas composition shown that they are dominated by methane (CH4). The East Siberian Arctic Shelf contains more than 30% world CH4 and carbon dioxide reserves, preserved in bottom sediments underwater permafrost. In shallow seas Shelf, main mechanism for transporting into water is bubble...
Abstract. The Yenisei and Khatanga rivers are among the largest estuarine that inflow to Arctic Ocean. Discharge of River is one order magnitude larger than River. However, spatial scales buoyant plumes formed by freshwater runoffs from gulfs similar. This feature caused different tidal forcing in these estuaries, which have similar sizes, climate conditions, geomorphology. discharge exhibits strong causes formation a diluted bottom-advected plume Gulf. anomalously deep weakly-stratified has...
The patterns of sediment temperatures and properties in the shelf continental slope areas Russian Arctic seas are essential for understanding current state subsea permafrost stability gas hydrates. New data reported Kara Sea region where bottom influenced by warming effects from great Siberian rivers Atlantic currents. collected during cruises 2019 through 2022 combined with earlier cruises, drilling, geophysical surveys Laptev East shelves, order to reveal general trends temperature...
Abstract. The Arctic now is undergoing dramatic changes, which cover the entire range of natural processes; from extreme increases in temperatures air, soil, and water, to changes cryosphere, biodiversity waters, land vegetation. Small largest marine carbon pool, dissolved inorganic can have profound impact on dioxide (CO2) flux between ocean atmosphere, feedback this climate. Knowledge relevant processes seas improves evaluation projection cycle dynamics under conditions rapid climate...
Resistivity in the bottom sediments wider Lena Delta