A5030136354- Methane Hydrates and Related Phenomena
- Climate change and permafrost
- Geological Studies and Exploration
- Geology and Paleoclimatology Research
- Marine and environmental studies
- Atmospheric and Environmental Gas Dynamics
- Arctic and Antarctic ice dynamics
- Cryospheric studies and observations
- Indigenous Studies and Ecology
- Hydrocarbon exploration and reservoir analysis
- Pleistocene-Era Hominins and Archaeology
- Geotechnical and Geomechanical Engineering
- Archaeology and ancient environmental studies
- Scientific Research and Discoveries
- Peatlands and Wetlands Ecology
- Landslides and related hazards
- Wildlife Ecology and Conservation
- Geophysical Methods and Applications
- Bat Biology and Ecology Studies
- Geotechnical Engineering and Underground Structures
- Spacecraft and Cryogenic Technologies
- Food Industry and Aquatic Biology
- Ecology and biodiversity studies
- Archaeology and Natural History
- Water Resources and Management
Melnikov Permafrost Institute of the Siberian Branch of the Russian Academy of Science
2021-2024
Siberian Branch of the Russian Academy of Sciences
2021-2024
Russian Academy of Sciences
2021-2023
V.I. Il'ichev Pacific Oceanological Institute
2022
National Research Tomsk State University
2015-2022
Lomonosov Moscow State University
2011-2021
University of Tyumen
2018-2020
Institute of Geography
2018-2020
Moscow State University
2017-2020
Tomsk Polytechnic University
2015-2016
Abstract The rates of subsea permafrost degradation and occurrence gas-migration pathways are key factors controlling the East Siberian Arctic Shelf (ESAS) methane (CH 4 ) emissions, yet these still require assessment. It is thought that after inundation, permafrost-degradation would decrease over time submerged thaw-lake taliks freeze; therefore, no CH release occur for millennia. Here we present results first comprehensive scientific re-drilling to show in near-shore zone ESAS has a...
A newly discovered Paleolithic site on the Yana River, Siberia, at 71°N, lies well above Arctic circle and dates to 27,000 radiocarbon years before present, during glacial times. This age is twice that of other known human occupations in any region. Artifacts include a rare rhinoceros foreshaft, mammoth foreshafts, wide variety tools flakes. shows people adapted this harsh, high-latitude, Late Pleistocene environment much earlier than previously thought.
Abstract Observations and measurements were made of physical ecological changes that have occurred since 1985 at a tundra site near Healy, Alaska. Air temperatures decreased (1985 through 1999) while permafrost warmed thawed creating thermokarst terrain, probably as result increased snow depths. Permafrost, active layer ground‐ice conditions the Healy are interaction climatic, ecologic other factors. The slow accumulation ground ice in an intermediate formed by upward freezing from surface...
Abstract. The Arctic Ocean, especially the East Siberian Shelf (ESAS), has been proposed as a significant source of methane that might play an increasingly important role in future. However, underlying processes formation, removal and transport associated with such emissions are to date strongly debated. CH4 concentration triple isotope composition were analyzed on gas extracted from sediment water sampled at numerous locations shallow ESAS 2007 2013. We find high concentrations (up 500 µM)...
Abstract Subsea permafrost represents a large carbon pool that might be or become significant greenhouse gas source. Scarcity of observational data causes uncertainties. We here use five 21-56 m long subsea cores from the Laptev Sea to constrain organic (OC) storage and sources, degradation state potential production upon thaw. Grain sizes, optically-stimulated luminescence biomarkers suggest deposition aeolian silt fluvial sand over 160 000 years, with dominant fluvial/alluvial forest-...
Ice complexes (ICs) formed during the Late Pleistocene regression (marine isotope stages 5–3) on drained Laptev Sea shelf and coastal lowlands. These sediments can be several dozen metres thick (up to 40–60 m). Over wide areas lower boundary of ICs is situated below current sea level. At about 13 ka BP thermokarst processes began destroy ICs, both Thermokarst lakes depressions (alasses) were 11–11.5 9.5–8.5 when shoreline position lay isobaths −60 −45 m. Lakes alasses became traps for via IC...
Abstract Based on the analysis of seafloor topography together with historical, geological and palaeogeographical data obtained from published archived sources, position former Ice Complex (IC) islands has been reconstructed. Within Laptev Sea shelf in western part East Siberian shelf, most these have destroyed by coastal thermal erosion abrasion during last thousand years or so. The IC were remnants ice‐rich syncryogenic freshwater terrestrial deposits (so called IC), which covered arctic...
As one of the best indicators periglacial environment, ice-wedge polygons (IWPs) are important for arctic landscapes, hydrology, engineering, and ecosystems. Thus, a better understanding spatiotemporal dynamics evolution IWPs is key to evaluating hydrothermal state carbon budgets permafrost environment. In this paper, ground surface deformation (GSD) in IWP zones (2018–2019) their influencing factors over last 20 years Saskylakh, northwestern Yakutia, Russia were investigated using...
Abstract. Methane (CH4) is a strong greenhouse gas emitted by human activity and natural processes that are highly sensitive to climate change. The Arctic Ocean, especially the East Siberian Shelf (ESAS) overlays large areas of subsea permafrost degrading. release amount CH4 originally stored or formed there could create positive feedback. Large scale super-saturation has been observed in ESAS waters, pointing leakages through sea floor possibly atmosphere, but origin this still debated....
Climate warming and anthropogenic impact causes transformation of geocryological conditions in the river basins North-East Russia. Changes thickness active layer, configuration taliks, types landscapes other factors lead to water exchange processes between surface groundwater runoff. This is manifested seasonal redistribution components balance, accelerated melting aufeis, change ratio waters different genesis structure As a result, natural risks that affect safe efficient development...
Abstract. Thaw of subsea permafrost across the Arctic Ocean shelves might promote degradation organic matter to CO2 and CH4, but also create conduits for transfer deeper CH4 pools atmosphere thereby amplify global warming. In this study, we describe sedimentary characteristics three cores 21–56 m length drilled near current delta Lena River in Buor–Khaya Bay on East Siberian Shelf, including content, origin state around thaw front. Grain size distribution optically stimulated luminescence...