A5041436589- Arctic and Antarctic ice dynamics
- Methane Hydrates and Related Phenomena
- Climate change and permafrost
- Climate variability and models
- Oceanographic and Atmospheric Processes
- Geological Studies and Exploration
- Marine and coastal ecosystems
- Organic Electronics and Photovoltaics
- Cryospheric studies and observations
- Atmospheric and Environmental Gas Dynamics
- Molecular Junctions and Nanostructures
- Conducting polymers and applications
- Chemical Synthesis and Analysis
- Thin-Film Transistor Technologies
- Organic Light-Emitting Diodes Research
- Synthetic Organic Chemistry Methods
- Geology and Paleoclimatology Research
- Sperm and Testicular Function
- Healthcare Systems and Challenges
- Ubiquitin and proteasome pathways
- Meteorological Phenomena and Simulations
- Distributed and Parallel Computing Systems
- Clinical Nutrition and Gastroenterology
- Consumer Market Behavior and Pricing
- Marine Biology and Ecology Research
Yonsei University
2002-2025
Naval Postgraduate School
2016-2024
Seoul National University
2023
Yongin Mental Hospital
2022
Bigelow Laboratory for Ocean Sciences
2014-2016
Stony Brook University
2005-2015
Stony Brook Medicine
2015
University of Maryland Center for Environmental Science
2013-2014
Stanford University
2011
Korea University
2002-2003
Abstract As the sea‐ice modeling community is shifting to advanced numerical frameworks, developing new rheologies, and increasing model spatial resolution, ubiquitous deformation features in Arctic sea ice are now being resolved by models. Initiated at Forum for Modeling Observational Synthesis, Sea Ice Rheology Experiment (SIREx) aims evaluating state‐of‐the‐art models using existing metrics understand how simulated fields affected different representations of physics (rheology)...
Abstract Simulating sea ice drift and deformation in the Arctic Ocean is still a challenge because of multiscale interaction floes that compose Sea cover. The Ice Rheology Experiment (SIREx) model intercomparison project Forum Modeling Observational Synthesis (FAMOS). In SIREx, skill metrics are designed to evaluate different recently suggested approaches for modeling linear kinematic features (LKFs) provide guidance small‐scale deformation. These LKFs narrow bands localized can be observed...
Abstract We investigated 32 net primary productivity (NPP) models by assessing skills to reproduce integrated NPP in the Arctic Ocean. The were provided with two sources each of surface chlorophyll‐ a concentration (chlorophyll), photosynthetically available radiation (PAR), sea temperature (SST), and mixed‐layer depth (MLD). most sensitive uncertainties chlorophyll, generally performing better situ chlorophyll than satellite‐derived values. They much less PAR, SST, MLD, possibly due...
Abstract Oxygen depletion in estuaries is a worldwide problem with detrimental effects on many organisms. Although nutrient loading has been stabilized for number of these systems, seasonal hypoxia persists and displays large year‐to‐year variations, larger hypoxic volumes wetter years smaller drier years. Data analysis points to climate as driver interannual variability, but inputs covary freshwater flow. Here we report an oxygen budget Chesapeake Bay quantify relative contributions...
Abstract The Arctic sea ice response to a warming climate is assessed in subset of models participating phase 6 the Coupled Model Intercomparison Project (CMIP6), using several metrics comparison with satellite observations and results from Pan-Arctic Ice Ocean Modeling Assimilation System Regional Model. Our study examines historical representation extent, volume, thickness spatial analysis metrics, such as integrated edge error, Brier score, probability score. We find that CMIP6 multimodel...
Abstract. Substantial amounts of nutrients and carbon enter the Arctic Ocean from Pacific through Bering Strait, distributed over three main pathways. Water with low salinities nutrient concentrations takes an eastern route along Alaskan coast, as Coastal Water. A central pathway exhibits intermediate salinity concentrations, while most nutrient-rich water enters Strait on its western side. Towards Ocean, flow these masses is subject to strong topographic steering within Chukchi Sea volume...
Abstract This study quantifies the state of art in rapidly growing field seasonal Arctic sea ice prediction. A novel multimodel dataset retrospective predictions September is created and analyzed, consisting community contributions from 17 statistical models dynamical models. Prediction skill compared over period 2001–20 for pan-Arctic extent (SIE), regional SIE, local concentration (SIC) initialized on 1 June, July, August, September. diverse set can individually predict linearly detrended...
The relative skill of 21 regional and global biogeochemical models was assessed in terms how well the reproduced observed net primary productivity (NPP) environmental variables such as nitrate concentration (NO3), mixed layer depth (MLD), euphotic (Zeu), sea ice concentration, by comparing results against a newly updated, quality-controlled situ NPP database for Arctic Ocean (1959–2011). broadly captured spatial features integrated (iNPP) on pan-Arctic scale. Most underestimated iNPP varying...
Abstract Recent observations suggest that substantial phytoplankton blooms occur under sea ice on Arctic continental shelves during June and July. This is opposed to the traditional view no significant biomass produced in sea‐ice covered waters. However, observational estimates are available Arctic‐wide primary production beneath ice. Here, using a fully coupled system model, we estimate 63%/41% of total central occurs waters by ≥50%/≥85% concentration. The there increasing at rate 5.2% per...
Despite recent advancements in organic photovoltaics (OPVs), further improvements power conversion efficiency (PCE) and device lifetime are necessary for commercial viability. Strategies such as optimizing the molecular orientation minimizing charge traps of films particularly effective enhancing photovoltaic performance. In this study, we successfully utilized vacuum electrospray deposition (VESD) to achieve favourable face-on stacking geometries while preserving integrity interfaces...
Rapid changes in the polar marine environment, driven by climate change, are altering variability of nutrient and light distribution, with significant impacts on primary producer growth. However, access to regions is limited, satellite data from high-latitude areas typically available only during summer, complicating acquisition continuous in-situ data. To address this, we collected year-round chlorophyll-a (Chl-a) concentration using a mooring system compared results reanalysis Unlike...
The Arctic region has been warming at a rate significantly faster than the global average, leading to an accelerated decline in sea ice. This trend is expected continue, potentially resulting "low-ice regime," which could make ice conditions more unpredictable. Anticipating changes and climate states therefore crucial for guiding various human activities, from natural resource management risk assessment decisions. While Earth system models project continuous over decadal time scales,...
The true electron transport mechanism of a bathocuproine exciton blocking layer in organic photovoltaics is comprehensively investigated.
DNA-base small molecules of guanine, cytosine, adenine, and thymine construct the DNA double helix structure with hydrogen bonding, they possess such a variety intrinsic benefits as natural plentitude, biodegradability, biofunctionality, low cost, toxicity. On basis these advantages, here, we report on unprecedented useful applications guanine layer getter charge trapping when it is embedded into dielectric oxide n-channel inorganic InGaZnO p-channel organic heptazole field effect...
Abstract Previous observational studies have found increasing primary production (PP) in response to declining sea ice cover the Arctic Ocean. In this study, under‐ice PP was assessed based on three coupled ice‐ocean‐ecosystem models participating Forum for Modeling and Observational Synthesis (FAMOS) project. All showed good agreement with measurements of surface chlorophyll‐a concentration vertically integrated rates during main period, from mid‐May September. Further, modeled 30‐year...
Abstract. During the winter of 2019/2020, as Multidisciplinary drifting Observatory for Study Arctic Climate (MOSAiC) project started its work, Oscillation (AO) experienced some largest shifts, ranging from a highly negative index in November 2019 to an extremely positive during January–February–March (JFM) 2020. The permanent AO phase 3 months JFM 2020 was accompanied by prevailing Dipole (AD) pattern. Here we analyze sea ice thickness (SIT) distribution based on CryoSat-2/SMOS...
Recent studies of Arctic Amplification (AA) suggest that the has been warming between three to four times faster compared global average. The loss sea ice in one most evident manifestations climate over past several decades. This decline pronounced Barents/Kara seas during winter and western summerChanges cover can be both a cause consequence anomalous atmospheric oceanic warming. In case trend, some earlier have suggested factors other than forcing, e.g., ocean heat transport storage, are...
Abstract The current coarse‐resolution global Community Earth System Model (CESM) can reproduce major and large‐scale patterns but is still missing some key biogeochemical features in the Arctic Ocean, e.g., low surface nutrients Canada Basin. We incorporated CESM Version 1 ocean code into Regional (RASM) coupled it with a sea‐ice algal module to investigate model limitations. Four ice‐ocean hindcast cases are compared various observations: two 1° (40∼60 km Arctic) grid: G1deg G1deg‐OLD...
Earth and Space Science Open Archive This work has been accepted for publication in Journal of Geophysical Research - Oceans. Version RecordESSOAr is a venue early communication or feedback before peer review. Data may be preliminary. Learn more about preprints. preprintOpen AccessYou are viewing the latest version by default [v1]Sea Ice Rheology Experiment (SIREx), Part II: Evaluating simulated linear kinematic features high-resolution sea-ice simulationsAuthorsNils...
Macrolide antibacterial agents inhibit parasite proliferation by targeting the apicoplast ribosome. Motivated long-term goal of identifying antiparasitic macrolides that lack activity, we have systematically analyzed structure−activity relationships among erythromycin analogues and also investigated mechanism action selected compounds. Two lead compounds, N-benzylazithromycin (11) N-phenylpropylazithromycin (30), were identified with significantly higher activity lower than or azithromycin....
We investigated the role of β1 integrin in mammalian fertilization and mode inhibition fertilinβ-derived polymers. determined that polymers displaying Glu-Cys-Asp peptide from fertilinβ disintegrin domain mediate through a receptor on egg surface. Inhibition is consequence competition with sperm binding to cell surface, not activation an egg-signaling pathway. The presence surface increases rate attachment but does alter total number can attach or fuse egg. conclude enhances initial adhesion...