A5038752961- Methane Hydrates and Related Phenomena
- Geological Studies and Exploration
- Atmospheric and Environmental Gas Dynamics
- Hydrocarbon exploration and reservoir analysis
- Geology and Paleoclimatology Research
- Arctic and Antarctic ice dynamics
- Climate change and permafrost
- Microbial Community Ecology and Physiology
- Geological formations and processes
- Seismic Imaging and Inversion Techniques
- Geological and Geophysical Studies
- Geological and Geochemical Analysis
- Cryospheric studies and observations
- Seismic Waves and Analysis
- Underwater Acoustics Research
- Arctic and Russian Policy Studies
- Marine and environmental studies
- Spacecraft and Cryogenic Technologies
- Aquatic and Environmental Studies
- Marine animal studies overview
- Genomics and Phylogenetic Studies
- Polar Research and Ecology
- Hydraulic Fracturing and Reservoir Analysis
- Geological Modeling and Analysis
- Seismology and Earthquake Studies
Korea Polar Research Institute
2016-2025
Korea Institute of Ocean Science and Technology
2000-2024
Songdo Hospital
2010
Dispersal of planktonic larvae can create connections between geographically separated adult populations benthic marine animals. How geographic context and life history traits affect these is largely unresolved. We use data from genetic studies (species level FST) teleost fishes combined with linear models to evaluate the importance transitions biogeographic regions, distance, egg type (benthic or pelagic eggs), larval duration (PLD), marker as factors affecting differentiation within...
Abstract Morphologic features, 600â1100 m across and elevated up to 30 above the surrounding seafloor, interpreted be mud volcanoes were investigated on continental slope in Beaufort Sea Canadian Arctic. Sediment cores, detailed mapping with an autonomous underwater vehicle, exploration a remotely operated vehicle show that these are young actively forming features experiencing ongoing eruptions. Biogenic methane lowâchloride, sodiumâbicarbonateârich waters extruded warm sediment accumulates...
SignificanceTemperature increases in Arctic regions have focused attention on permafrost degradation land, whereas little is known about the dynamics of extensive glacial-age bodies now submerged under vast Continental shelves. Repeated high-resolution bathymetric surveys show that extraordinarily rapid morphologic changes are occurring at edge continental slope Canadian Beaufort Sea along what was once seaward limit relict Pleistocene permafrost. How widespread similar shelves unknown, as...
Biological concentrations of methylmercury (MeHg) are elevated throughout the Arctic Ocean; however, to date, major sources and spatial variability MeHg not well quantified. To identify inputs outputs shelf water column, we measured in seawater sediment samples from East Siberian Sea collected August September 2018. We found that pore were higher on slope than shelf, while slope. created a mass budget for benthic diffusion resuspension largely exceed other sources, such as atmospheric...
Gram-stain-negative, strictly aerobic, red-pink-coloured, rod-shaped and non-motile bacterial strains PAMC 29290, 29294T 29296 were isolated from marine surface sediment sampled in the East Siberian Sea 26553 26554T obtained an Antarctic lichen. Strains closely related to Hymenobacter artigasi (98.8 % 16S rRNA gene similarity), antarcticus (97.3 %) glaciei (96.9 %), showed high similarity ginsengisoli (97.0 rivuli (96.1 setariae (95.9 %). Genomic relatedness analyses that could be...
Abstract Glacigenic bedforms such as glacial lineations and moraines on the Chukchi East Siberian margins of Arctic Ocean reveal recurrent waxing waning voluminous ice masses. Despite their paleoclimatic significance, timing, geographic distribution, mechanisms these glaciations remain inadequately understood. To enhance our understanding Quaternary history, we study highâresolution swath bathymetry subbottom profiler data with lithostratigraphy provenance four sediment cores. These...
The Chukchi Basin, a sub-basin of the Amerasia Basin in Arctic Ocean, remains enigmatic regarding its formation age and tectonic processes. Among various hypotheses proposed, seafloor spreading or hyper-extended rifting during Cretaceous are currently prominent, both supported by gravity deep seismic survey data. Recent marine heat flow (MHF) observation efforts using IBRV Araon from 2018 to 2024 have resulted comprehensive dataset covering basin along across inferred N-S oriented axis...
Abstract Submarine permafrost in the Canadian Beaufort Sea is relict terrestrial permafrost, which continuously degrading since change of thermal conditions induced by a marine transgression that followed last glaciation. Permafrost degradation has crucial socioâecological significance because its thawing can result geohazards like landslides or an increase greenhouse gas emissions. These consequences are mostly regulated state ice permafrost. In this study, we use multichannel seismic data...
Abstract Longâterm warming of the continental shelf Canadian Beaufort Sea caused by transgression associated with last deglaciation may be causing decomposition relict offshore subsea permafrost and gas hydrates. To evaluate this possibility, pore waters from 118 sediment cores up to 7.3âm long were taken on slope analyzed for chloride concentrations δ 18 0 δD composition. We observed downcore decreases in Cl â concentration sediments all sites inner (<20âm water depth), edge, outer (down...
Abstract Highâresolution seafloor mapping provides insights into the dynamics of past ice sheets/ice shelves on highâlatitude continental margins. Geological/geophysical studies in Arctic Ocean suggest widespread Pleistocene grounding ChukchiâEast Siberian margin. However, flow directions, timing, and behavior these masses are not yet clear due to insufficient data. We present a combined seismostratigraphic morphobathymetric analysis Chukchi Rise off northwestern margin using densely...
Abstract The Canadian Arctic Southern Beaufort Sea is characterized by prominent relict submarine permafrost and gas hydrate occurrences formed subaerial exposure during extensive glaciations in Pliocene Pleistocene. Submarine still responding to the thermal change as a consequence of marine transgression that followed last glaciation. underexplored currently focus several research projects its degradation releases greenhouse gases contribute climate change. In this study, seismic reflection...
The Tatarsky Trough lies near the eastern coast of Far Eastern Russia, extending into northern parts East Sea Korea (also known as Japan). This region is renowned for its tectonic activity and active gas seeps, making it an ideal natural laboratory studying biogeochemical dynamics gas-rich sediments. In this study, we investigated two sediment cores, LV67-07HC (358 cm core length) LV67-19HC (398 length), recovered from fault zones on slope (water depths 300&#8211;700 m) during SSGH...
Gas hydrates are natural gas reservoirs in iceâlike crystalline solids, and stable pore spaces of submarine sediments water depths greater than about 300â500 m. They have been recovered many the world's oceans, both at larger subâbottom (up to 450 m) by drilling near seafloor shallow cores gravityâcoring. In latter case, related sites enhanced seepage such as cold seeps mud volcanoes [ Ginsburg Soloviev , 1998]. Multidisciplinary field investigations during two cruises revealed new, large...
Abstract. In this study, we report lipid biomarker patterns and phylogenetic identities of key microbial communities mediating anaerobic oxidation methane (AOM) in active mud volcanoes (MVs) on the continental slope Canadian Beaufort Sea. The carbon isotopic compositions (δ13C) sn-2- sn-3-hydroxyarchaeol showed highly 13C-depleted values (â114 â° to â82 â°) associated with a steep depletion sulfate concentrations within 0.7 m sediment depths. This suggested presence methanotrophic archaea...