Hyun‐Cheol Kim
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View article: Unicorn: U-Net for sea ice forecasting with convolutional neural ordinary differential equations
Unicorn: U-Net for sea ice forecasting with convolutional neural ordinary differential equations Open
Sea ice at the North Pole is vital to global climate dynamics. However, accurately forecasting sea ice poses a significant challenge due to the intricate interaction among multiple variables. Leveraging the capability to integrate multiple…
View article: Spatial Regionalization of the Arctic Ocean Based on Ocean Physical Property
Spatial Regionalization of the Arctic Ocean Based on Ocean Physical Property Open
The Arctic Ocean has a uniquely complex system associated with tightly coupled ocean–ice–atmosphere–land interactions. The Arctic Ocean is considered to be highly susceptible to global climate change, with the potential for dramatic enviro…
View article: Volatility characteristics and hyperspectral-based detection models of diesel in soils
Volatility characteristics and hyperspectral-based detection models of diesel in soils Open
This study developed an efficient method using hyperspectral camera for detecting diesel content in soils with spectral indices. Over 70 days of the experiment, clean soils were saturated with diesel, and 186 measurements were taken to mon…
View article: Development of Field-Deployable Detection Models for Asbestos Host Rocks Using Close-Range Hyperspectral Imaging and Diverse Lithological Training Data
Development of Field-Deployable Detection Models for Asbestos Host Rocks Using Close-Range Hyperspectral Imaging and Diverse Lithological Training Data Open
This study presents a field-applicable detection models for host rocks of naturally occurring asbestos (NOA) through hyperspectral imaging and machine learning. We developed detection models using the most comprehensive dataset to date: 10…
View article: Sea-Ice Surface Types Characterization and SAR Volume Backscattering Properties in Response to Sea States Interactions Using Structural Feature Fusion
Sea-Ice Surface Types Characterization and SAR Volume Backscattering Properties in Response to Sea States Interactions Using Structural Feature Fusion Open
Despite extensive research in polar remote sensing, there is still no consensus on how sea-ice evolves in response to interactions with ocean waves, nor is there agreement on the most effective way to characterize it based on fluctuations …
View article: Enhancing Passive Microwave Brightness Temperature Using Dual-Attention SRGAN
Enhancing Passive Microwave Brightness Temperature Using Dual-Attention SRGAN Open
This study presents a dual-attention super-resolution generative adversarial network (DA-SRGAN) framework to enhance the spatial resolution of passive microwave (PMW) brightness temperature (TB) data from 12.5/25 km to 3.125/6.25 km. By in…
View article: Adaptive foraging strategies of Adélie penguins in the Ross Sea Region: balancing chick feeding and body condition in changing marine environments
Adaptive foraging strategies of Adélie penguins in the Ross Sea Region: balancing chick feeding and body condition in changing marine environments Open
Breeding seabirds are required to balance between feeding their chicks and maintaining their body condition. Adélie penguins ( Pygoscelis adeliae ), a keystone species of the Antarctic ecosystem, have foraging behavioral flexibility that d…
View article: Optimal Path Calculation for Multi-ring Based Packet–Optical Transport Networks
Optimal Path Calculation for Multi-ring Based Packet–Optical Transport Networks Open
Multi-domain optical transport networks are inherently non-interoperable and require integrated orchestration and path provisioning mechanisms at the network-wide level. Moreover, ensuring the network’s survivability is a critical issue. W…
View article: Significant role of physical transport in the marine carbon monoxide (CO) cycle: observations in the East Sea (Sea of Japan), the western North Pacific, and the Bering Sea in summer
Significant role of physical transport in the marine carbon monoxide (CO) cycle: observations in the East Sea (Sea of Japan), the western North Pacific, and the Bering Sea in summer Open
The carbon monoxide (CO) in the marine boundary layer and in the surface waters and water column were measured along the western limb of the North Pacific from the Korean Peninsula to Alaska, USA, in summer 2012. The observation allows us …
View article: Arctic Greening Trends: Change Points in Satellite-Derived Normalized Difference Vegetation Indexes and Their Correlation with Climate Variables over the Last Two Decades
Arctic Greening Trends: Change Points in Satellite-Derived Normalized Difference Vegetation Indexes and Their Correlation with Climate Variables over the Last Two Decades Open
In this study, we utilized NDVI data from the moderate resolution imaging spectroradiometer (MODIS) alongside climatic variables obtained from a reanalyzed dataset to analyze Arctic greening during the summer months (June–September) of the…
View article: The Impact of Sentinel-1-Corrected Fractal Roughness on Soil Moisture Retrievals
The Impact of Sentinel-1-Corrected Fractal Roughness on Soil Moisture Retrievals Open
Fractals are widely recognized as one of the best geometric models to depict soil roughness on various scales from tillage to micro-topography smaller than radar wavelength. However, most fractal approaches require an additional geometric …
View article: Directional Wave Scattering Distribution Modes Analysis and Synthesis of Random Ocean Media Roughness for SAR Electromagnetic Interactions Using Feature Fusion in Dynamic Sea States: A Survey
Directional Wave Scattering Distribution Modes Analysis and Synthesis of Random Ocean Media Roughness for SAR Electromagnetic Interactions Using Feature Fusion in Dynamic Sea States: A Survey Open
Ocean waves have long been a research topic, and numerous formulas of the ocean wave spectrum have been widely developed to provide new prospects for ocean experiments and the advancement of radar probing. Nonetheless, the wave spectra dev…
View article: Comment on egusphere-2023-2290
Comment on egusphere-2023-2290 Open
Abstract. The carbon monoxide (CO) in the marine boundary layer and in the surface waters and water column were measured along the Northwestern Pacific limb from Korean Peninsula to Alaska, U.S.A. in summer 2012. The observation allows us …
View article: Significant role of physical transport in the marine carbon monoxide (CO) cycle – Observations in the East Sea (Sea of Japan), the Western North Pacific, and the Bering Sea in summer
Significant role of physical transport in the marine carbon monoxide (CO) cycle – Observations in the East Sea (Sea of Japan), the Western North Pacific, and the Bering Sea in summer Open
The carbon monoxide (CO) in the marine boundary layer and in the surface waters and water column were measured along the Northwestern Pacific limb from Korean Peninsula to Alaska, U.S.A. in summer 2012. The observation allows us to estimat…
View article: Geometric and Radiometric Quality Assessments of UAV-Borne Multi-Sensor Systems: Can UAVs Replace Terrestrial Surveys?
Geometric and Radiometric Quality Assessments of UAV-Borne Multi-Sensor Systems: Can UAVs Replace Terrestrial Surveys? Open
Unmanned aerial vehicles (UAVs), also known as drones, are a cost-effective alternative to traditional surveying methods, and they can be used to collect geospatial data over inaccessible or hard-to-reach locations. UAV-integrated miniatur…
View article: Estimation of summer pan-Arctic ice draft from satellite passive microwave observations
Estimation of summer pan-Arctic ice draft from satellite passive microwave observations Open
Pan-Arctic observations of summer sea ice thickness have been a challenging problem despite their global significance in weather/climate analysis and prediction. To solve this problem, this study developed a method for estimating the pan-A…
View article: Explicitly determined sea ice emissivity and emission temperature over the Arctic for surface‐sensitive microwave channels
Explicitly determined sea ice emissivity and emission temperature over the Arctic for surface‐sensitive microwave channels Open
Data assimilation of satellite microwave measurements is one of the important keys to improving weather forecasting over the Arctic region. However, the use of surface‐sensitive microwave‐sounding channel measurements for data assimilation…
View article: Small Unmanned Aerial Vehicle LiDAR-based High Spatial Resolution Topographic Dataset in Russell Glacier, Greenland
Small Unmanned Aerial Vehicle LiDAR-based High Spatial Resolution Topographic Dataset in Russell Glacier, Greenland Open
Greenland contains a large continental glacier. The influence of glacier melting has been expanding due to global warming. Although regional monitoring based on satellite data is being conducted, the demand for local/specific variation obs…
View article: Establishment of Geographic Information Data of Greenland Glacier Using Fixed-wing Unmanned Aerial Vehicle
Establishment of Geographic Information Data of Greenland Glacier Using Fixed-wing Unmanned Aerial Vehicle Open
In recent decades, the Greenland glacier has experienced significant changes in the environment near the surface due to the increase in surface melting on glacier. In order to quantify these environmental changes, precise spatial informati…
View article: Sea Ice Elevation Measurements Using 3-D Laser Scanner
Sea Ice Elevation Measurements Using 3-D Laser Scanner Open
This study aims to introduce a sea ice elevation dataset estimated by using a 3-D laser scanner during the ice camp of the 2022 Arctic summer field survey. The equipment used is FARO’s Laser scanner FOCUS 3D X 130 HDR. The observed sea ice…
View article: Meteorological and Sea Surface Water Measurement Data from Icebreaker Research Vessel ARAON for 2020-2021 Arctic Research Expeditions
Meteorological and Sea Surface Water Measurement Data from Icebreaker Research Vessel ARAON for 2020-2021 Arctic Research Expeditions Open
Since its construction in 2010, the icebreaker ARAON has been conducting regular polar field surveys to observe changes in the atmosphere and marine environment in polar regions. The Arctic Ocean, a major research area, is directly affecte…
View article: Sea Ice Drift from GPS Tracker Deployed in the Arctic Ocean
Sea Ice Drift from GPS Tracker Deployed in the Arctic Ocean Open
Sea ice is monitored on a regular basis by satellite observation; however, image-based drift tracking is imprecise as the time interval forming the image-pair is too large to capture the actual trajectory of ice drift. In this study, drift…
View article: Imputation of Ocean-color Product in Polynya Region of Antarctica for Primary Productivity Estimates
Imputation of Ocean-color Product in Polynya Region of Antarctica for Primary Productivity Estimates Open
This study, focusing on the Antarctic polynyas, performed the imputation of chlorophyll-a concentration (Chl-a) dataset, which is one of the ocean color products mainly used for estimating primary productivity, using the Data Interpolating…
View article: Spatial Assessment of Asbestos Mine Remediation Effect Using Airborne Hyperspectral Imaging System
Spatial Assessment of Asbestos Mine Remediation Effect Using Airborne Hyperspectral Imaging System Open
This work investigated an abandoned asbestos mine (AAM) remediation project in CA, US. Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) hyperspectral data were used to assess the mine treatment effect. The distribution of AAM and re…
View article: Variability of Surface Radiation Budget over Arctic during Two Recent Decades from Perspective of CERES and ERA5 Data
Variability of Surface Radiation Budget over Arctic during Two Recent Decades from Perspective of CERES and ERA5 Data Open
This study focused on surface radiation budget, one of the essential factors for understanding climate change. Arctic surface radiation budget was summarized and explained using a satellite product, Clouds and the Earth’s Radiant Energy Sy…