A5035952466- Methane Hydrates and Related Phenomena
- Geology and Paleoclimatology Research
- Geological Studies and Exploration
- Arctic and Antarctic ice dynamics
- Hydrocarbon exploration and reservoir analysis
- Atmospheric and Environmental Gas Dynamics
- Geological formations and processes
- Climate change and permafrost
- Underwater Acoustics Research
- Geological and Geophysical Studies
- Cryospheric studies and observations
- Geochemistry and Geologic Mapping
- Geological and Geochemical Analysis
- Seismic Imaging and Inversion Techniques
- Seismic Waves and Analysis
- Mineral Processing and Grinding
- Polar Research and Ecology
- Geomagnetism and Paleomagnetism Studies
- Remote-Sensing Image Classification
- Soil Geostatistics and Mapping
- Offshore Engineering and Technologies
- Marine animal studies overview
- Landslides and related hazards
- Isotope Analysis in Ecology
- Paleontology and Stratigraphy of Fossils
Korea Polar Research Institute
2016-2025
Korea Institute of Ocean Science and Technology
1994-2024
Korea University of Science and Technology
2012-2017
University of Science and Technology
2012
Songdo Hospital
2010
Kangwon National University
2010
Abstract The Southern Ocean surrounding Antarctica is a region that key to range of climatic and oceanographic processes with worldwide effects, characterised by high biological productivity biodiversity. Since 2013, the International Bathymetric Chart (IBCSO) has represented most comprehensive compilation bathymetry for south 60°S. Recently, IBCSO Project combined its efforts Nippon Foundation – GEBCO Seabed 2030 supporting goal mapping world’s oceans 2030. New datasets initiated second...
Geological mapping is one of the primary tasks remote sensing. Remote sensing applications are especially useful when extreme environmental conditions inhibit direct survey such as in Antarctica. In this investigation, a satellite-based approach was used for alteration mineral zones and lithological units using Advanced Spaceborne Thermal Emission Reflection Radiometer (ASTER) data Oscar II coast area, north-eastern Graham Land, Antarctic Peninsula. Specialized band ratios combinations were...
Geological mapping and mineral exploration programs in the High Arctic have been naturally hindered by its remoteness hostile climate conditions. The Franklinian Basin North Greenland has a unique potential for of world-class zinc deposits. In this research, multi-sensor remote sensing satellite data (e.g., Landsat-8, Phased Array L-band Synthetic Aperture Radar (PALSAR) Advanced Spaceborne Thermal Emission Reflection Radiometer (ASTER)) were used exploring trough sequences shelf-platform...
Abstract The second generation Antarctic magnetic anomaly compilation for the region south of 60°S includes some 3.5 million line‐km aeromagnetic and marine data that more than doubles initial map's near‐surface database. For new compilation, sets were corrected International Geomagnetic Reference Field, diurnal effects, high‐frequency errors leveled, gridded, stitched together. further constrain crustal architecture geological evolution Peninsula West Rift System in Antarctica, as well...
Several regions in the High Arctic still lingered poorly explored for a variety of mineralization types because harsh climate environments and remoteness. Inglefield Land is an ice-free region northwest Greenland that contains copper-gold associated with hydrothermal alteration mineral assemblages. In this study, Landsat-8, Advanced Spaceborne Thermal Emission Reflection Radiometer (ASTER), WorldView-3 multispectral remote sensing data were used mapping prospecting at regional, local,...
Listvenites normally form during hydrothermal/metasomatic alteration of mafic and ultramafic rocks represent a key indicator for the occurrence ore mineralizations in orogenic systems. Hydrothermal/metasomatic mineral assemblages are one significant indicators damage zones major tectonic boundaries, which can be detected using multispectral satellite remote sensing data. In this research, Advanced Spaceborne Thermal Emission Reflection Radiometer (ASTER) data were used to detect listvenite...
Many regions remain poorly studied in terms of geological mapping and mineral exploration inaccessible especially the Arctic Antarctica due to harsh conditions logistic difficulties. Application specialized image processing techniques is capable revealing hidden linear mixing spectra multispectral hyperspectral satellite images. In this study, applications Independent component analysis (ICA) Constrained Energy Minimization (CEM) algorithms were evaluated for Landsat-8 Advanced Spaceborne...
Abstract Morphologic features, 600–1100 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 low‐chloride, sodium‐bicarbonate‐rich waters extruded warm sediment accumulates...
Permafrost extends offshore in the Arctic as submarine permafrost. Near edge of stable, continuous permafrost offshore, fresh groundwater flux contributes to regions actively deforming thermokarst. Large-magnitude (up ~30 m) sinkholes have been observed form over less than a decade, posing significant threat infrastructure. Additionally, having recently discovered sub-Arctic environments, thermokarst formation may be possible wider range conditions previously thought. It is critical...
Research Article| May 01, 2017 Widespread persistence of expanded East Antarctic glaciers in the southwest Ross Sea during last deglaciation Jae Il Lee; Lee 1Korea Polar Institute, Songdomirae-ro 26, Yeonsu-gu, Incheon 21990, Republic Korea Search for other works by this author on: GSW Google Scholar Robert M. McKay; McKay * 2Antarctic Centre, Victoria University Wellington, PO Box 600, Wellington 6140, New Zealand *E-mail: robert.mckay@vuw.ac.nz Nicholas R. Golledge; Golledge Zealand3GNS...
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 high‐resolution 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...
In Antarctica, spectral mapping of altered minerals is very challenging due to the remoteness and inaccessibility poorly exposed outcrops. This investigation evaluates capability Advanced Spaceborne Thermal Emission Reflection Radiometer (ASTER) satellite remote sensing imagery for discrimination phyllosilicate mineral groups in Antarctic environment northern Victoria Land. The Mixture-Tuned Matched-Filtering (MTMF) Constrained Energy Minimization (CEM) algorithms were used detect sub-pixel...
Since 2001, hundreds of thousands hours underwater acoustic recordings have been made throughout the Southern Ocean south 60° S. Detailed analysis occurrence marine mammal sounds in these circumpolar could provide novel insights into their ecology, but manual inspection entirety all would be prohibitively time consuming and expensive. Automated signal processing methods now developed to point that they can applied data a cost-effective manner. However training evaluating efficacy automated...
Abstract Long‐term 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 7.3‐m long were taken on slope analyzed for chloride concentrations δ 18 0 δD composition. We observed downcore decreases in Cl − concentration sediments all sites inner (<20‐m water depth), edge, outer (down...
ABSTRACT The Drake Passage is an oceanic gateway of about 850 km width located between South America and the Antarctic Peninsula that connects southeastern Pacific Ocean with southwestern Atlantic Ocean. It important for mantle flow, oceanographic water masses, migrations biota. This sector developed within framework geodynamic evolution Scotia Arc, including continental fragmentation processes crust creation, since oblique divergence American plate to north south started in Eocene. As a...
Abstract High‐resolution seafloor mapping provides insights into the dynamics of past ice sheets/ice shelves on high‐latitude continental margins. Geological/geophysical studies in Arctic Ocean suggest widespread Pleistocene grounding Chukchi–East 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 southeastern Korean margin documents the processes of continental rifting and seafloor spreading that eventually led to opening southern part East Sea (Japan Sea). Two‐dimensional crustal structure was computed from ocean bottom seismometer data by tomographic inversion iterative forward modeling. shows emplacement high‐velocity (>7 km/s) lower crust under shelf slope area associated with a rapid transition rifted oceanic crust. is interpreted as magmatic underplating formed...