A5075197002- Methane Hydrates and Related Phenomena
- Atmospheric and Environmental Gas Dynamics
- Arctic and Antarctic ice dynamics
- Climate change and permafrost
- Geological Studies and Exploration
- Hydrocarbon exploration and reservoir analysis
- Geology and Paleoclimatology Research
- Marine and environmental studies
- Cryospheric studies and observations
- Underwater Acoustics Research
- Aquatic and Environmental Studies
- Microplastics and Plastic Pollution
- Geological formations and processes
- Oil Spill Detection and Mitigation
- Recycling and Waste Management Techniques
- Winter Sports Injuries and Performance
- Scientific Research and Discoveries
- Landslides and related hazards
- Ultrasound and Cavitation Phenomena
- Marine Biology and Environmental Chemistry
Institute of Tectonics and Geophysics named after Y.A. Kosygin
2024
V.I. Il'ichev Pacific Oceanological Institute
2014-2023
Far Eastern Branch of the Russian Academy of Sciences
2014-2023
Russian Academy of Sciences
2014-2023
National Research Tomsk State University
2014-2023
National Research University Higher School of Economics
2023
Tomsk Polytechnic University
2014-2020
Bolin Centre for Climate Research
2020
Stockholm University
2020
Sustained release of methane (CH(4)) to the atmosphere from thawing Arctic permafrost may be a positive and significant feedback climate warming. Atmospheric venting CH(4) East Siberian Shelf (ESAS) was recently reported on par with flux tundra; however, future scale these releases remains unclear. Here, based results our latest observations, we show that emissions this shelf are likely determined by state subsea degradation. We observed two previously understudied areas ESAS: outer shelf,...
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...
Abstract Plastic pollution is globally recognised as a threat to marine ecosystems, habitats, and wildlife, it has now reached remote locations such the Arctic Ocean. Nevertheless, distribution of microplastics in Eurasian particularly underreported. Here we present analyses 60 subsurface pump water samples 48 surface neuston net from with goal quantify classify relation oceanographic conditions. In our study area, found on average 0.004 items per m 3 samples, 0.8 samples. Microplastic...
Significance Extensive release of methane from sediments the world’s largest continental shelf, East Siberian Arctic Ocean (ESAO), is one few Earth system processes that can cause a net transfer carbon land/ocean to atmosphere and thus amplify global warming on timescale this century. An important gap in our current knowledge concerns contributions different subsea pools observed releases. This prerequisite robust predictions how these releases will develop future. Triple-isotope–based...
Abstract. Sonar surveys provide an effective mechanism for mapping seabed methane flux emissions, with Arctic submerged permafrost seepage having great potential to significantly affect climate. We created in situ engineered bubble plumes from 40 m depth fluxes spanning 0.019 1.1 L s−1 derive the calibration curve (Q(σ)). These nonlinear curves related (Q) sonar return (σ) a multibeam echosounder (MBES) and single-beam (SBES) range of depths. The analysis demonstrated significant multiple...
Lake Vättern represents a critical region geographically and dynamically in the deglaciation of Fennoscandian Ice Sheet. The outlet glacier that occupied basin its behaviour during ice‐sheet retreat were key to development drainage Baltic Lake, dammed just west basin, yet geometry, extent, thickness, margin dynamics, timing sensitivity regional forcing are rather poorly known. submerged sediment archives represent missing component Swedish history. Newly collected geophysical data, including...
Seeps found offshore in the East Siberian Arctic Shelf may mark zones of degrading subsea permafrost and related destabilization gas hydrates. Sonar surveys provide an effective tool for mapping seabed methane fluxes monitoring seepage. The paper presents overview existing approaches to sonar estimation bubble flux from sea floor water column a new method quantifying CH4 ebullition. In suggested method, bubbles is estimated its response insonification using backscattering cross section. has...
The paper presents the results of in situ studies marine particles different nature using a submersible digital holographic camera (DHC) during Arctic expedition. It also describes features, performance specifications, and possibilities DHC technology. technology can be used for noninvasive automatic evaluation spatial temporal characteristics plankton, including distribution plankton concentrations. comparison quantitative analysis zooplankton net samples classification revealed that error...
The withdrawal of the Late Weichselian ice sheet and rapid isostatic uplift in southern Scandinavia led to entrainment large volumes melt water within proglacial Baltic Ice Lake (BIL). eventual western outpost BIL, Vättern, has been a focal point for studying dynamic retreat history south central Sweden. This part deglacial is described from an abundance terrestrial studies, but, date, no complimentary long sediment cores Vättern have available. Here, we present results unique, 74 m borehole...
A passive acoustic method for detecting environmentally dangerous gas leaks from pipelines and methane naturally leaking the seabed has been investigated. Gas escape involves formation release of bubbles different sizes. Each bubble emits a sound at specific frequency. Determination radius frequency its signature emission by use so-called Minnaert formula restricted area applicability near seabed. The point is that inertial mass damping constant birthing are markedly those free bubble....
The East Siberian Arctic Shelf (ESAS) is a key area of CH4 venting in the Ocean. ESAS region stores more than 80% world’s predicted subsea permafrost and associated permafrost-related gas hydrates. Gas emissions from are controlled by its current thermal state, which, turn, depends on environmental factors. aim manuscript to show that state phase transitions pore moisture can be estimated remotely echo soundings, which resolve structure shallow bottom sediments. It has been found duration...
Global warming in high latitudes causes destabilization of vulnerable permafrost deposits followed by massive thaw-release organic carbon. Permafrost-derived carbon may be buried the nearshore sediments, transported towards deeper basins or degraded into greenhouse gases, potentially initiating a positive feedback to climate change. In present study, we aim identify sources, distribution and degradation state matter (OM) stored surface sediments Laptev Sea (LS), which receives large input...
This paper presents the results of an acoustic survey carried out from fast ice in shallow waters East Siberian Arctic Shelf (ESAS) using a single beam echosounder. The aim this is to demonstrate improved approach study seafloor seepages coastal zone with echosounder calibrated on site. During wintertime field observations natural rising gas bubbles, we recorded three periods their increased activity total 63 short-term ejections bubbles seabed. quantitative estimates methane (CH4) flux...
Актуальность исследования обусловлена необходимостью всестороннего изучения процессов, ответственных за изменения биогеохимического режима арктического региона. Увеличение темпов деградации прибрежной и подводной мерзлоты на Восточно-Сибирском шельфе приводит к вовлечению в современный биогеохимический цикл большого объема ремобилизованного органического углерода. Изучение особенностей его транспорта преобразования системе суша–шельф играет важную роль для оценки функционирования крайне...