A5078241503- Climate variability and models
- Meteorological Phenomena and Simulations
- Tropical and Extratropical Cyclones Research
- Atmospheric and Environmental Gas Dynamics
- Atmospheric aerosols and clouds
- Atmospheric chemistry and aerosols
- Viral gastroenteritis research and epidemiology
- Wind and Air Flow Studies
- Ocean Acidification Effects and Responses
- Animal Virus Infections Studies
- Viral Infections and Immunology Research
- Precipitation Measurement and Analysis
- Atmospheric Ozone and Climate
- Air Quality Monitoring and Forecasting
- Oceanographic and Atmospheric Processes
- Silicon Carbide Semiconductor Technologies
- Advanced Fiber Laser Technologies
- Photorefractive and Nonlinear Optics
- Photonic and Optical Devices
- Identification and Quantification in Food
- Landslides and related hazards
- Bone Tissue Engineering Materials
- Microbial Community Ecology and Physiology
- Smart Agriculture and AI
- Anesthesia and Sedative Agents
Yonsei University
2015-2025
Pukyong National University
2025
Ulsan National Institute of Science and Technology
2019-2022
NSF National Center for Atmospheric Research
2013-2016
Microscale (United States)
2016
Kyungpook National University
2016
Severance Hospital
2015
Seoul Metropolitan Government
2009-2011
Seoul Institute
2009
Tokyo University of Agriculture and Technology
2000
Abstract Kinetic energy (KE) spectra derived from global high-resolution atmospheric simulations the Model for Prediction Across Scales (MPAS) are presented. The produced using quasi-uniform Voronoi horizontal meshes with 3-, 7.5-, and 15-km mean cell spacings. KE MPAS compare well observations other in literature possess canonical structure including a very-well-resolved shallow-sloped mesoscale region 3-km simulation. There is peak vertical velocity variance at model filter scale all...
Abstract The role of vertical mesh spacing in the convergence full-physics global atmospheric model solutions is examined for synoptic, mesoscale, and convective-scale horizontal resolutions. Using MPAS-Atmosphere model, evaluated three solution metrics: kinetic energy spectrum, Richardson number probability density function, resolved flow features. All metrics exhibit free atmosphere a 15-km when grid less than or equal to 200 m. Nonconvergence accompanied by noise, spurious structures,...
Intensive algal blooms increasingly degrade the inland water quality. Hence, this study aimed to analyze phenomena quantitatively and qualitatively using synoptic monitoring, pigment analysis, a deep learning model. Water surface reflectance was measured field monitoring drone hyperspectral image sensing. The experiment conducted on samples provided data major pigments including chlorophyll-a phycocyanin, accessory lutein, fucoxanthin, zeaxanthin, absorption coefficients. Based coefficient...
Abstract Idealized normal-mode baroclinic wave simulations are conducted to examine the impact of continuous mesh refinement compared with stepwise changes in resolution using nested grids. The nested-grid results produced Advanced Research Weather and Forecasting (WRF-ARW) Model, hereafter ARW, atmospheric component Model for Prediction Across Scales-Atmosphere (MPAS-A). For domain variants both one-way two-way nesting techniques examined. Significant reflection distortion waves evident...
Abstract The hydrostatic and nonhydrostatic atmospheric solvers within the Model for Prediction Across Scales (MPAS) are tested using an extension of Jablonowski Williamson baroclinic wave test case that includes moisture. This study uses dry to verify correctness solver formulation coding by comparing results from two different MPAS global version Advanced Research Weather Forecasting (ARW-WRF). A normal mode initialization is used in test, most unstable found be wavenumber 9. three produce...
Abstract A regional configuration of the atmospheric component Model for Prediction Across Scales (MPAS-A) is described and evaluated. It employs horizontally unstructured spherical centroidal Voronoi meshes (nominally hexagonal), lateral boundary conditions used in rectangular grid models are adapted to MPAS-A mesh discretization. Test results using a perfect-model assumption show that stable robust. As found other modeling studies, configurations larger domains generally have smaller...
Abstract Although a terrain-following vertical coordinate is well suited for the application of surface boundary conditions, it known that influences terrain on surfaces can contribute to increase numerical errors, particularly over steep topography. To reduce these hybrid sigma–pressure formulated in Weather Research and Forecasting (WRF) Model, its effects are illustrated both an idealized test case real-data forecast upper-level turbulence. The confirms with basic sigma coordinate,...
The sources of primary and secondary aerosols in the Arctic are still poorly known. A number surface seawater samples—with varying degrees riverine sea ice influences—were used a spray generation chamber to test them for their potential produce (SSA) cloud condensation nuclei (CCN). Our interdisciplinary data showed that both salt organic matter (OM) significantly influenced SSA production. concentration coastal samples was negatively correlated with salinity positively OM tracers, including...
Abstract We present a comprehensive evaluation of the regional Model for Prediction Across Scales (rMPAS) in simulating heavy snowfall events during International Collaborative Experiment Pyeongchang Olympics and Paralympics field campaign Korean Peninsula. compared rMPAS simulations with those Weather Research Forecasting (WRF) model observational data three significant events, emphasizing on their performances capturing precipitation patterns synoptic environments. Both WRF models...
Abstract The nonhydrostatic Model for Prediction Across Scales (NH‐MPAS) provides a global framework to achieve high resolution using regional mesh refinement. Previous studies the hydrostatic version of MPAS (H‐MPAS) with physics parameterizations Community Atmosphere 4 (CAM4) found notable resolution‐dependent behaviors. This study revisits sensitivity NH‐MPAS both CAM4 and CAM5 physics. A series aqua‐planet simulations at quasiuniform resolutions variable refinement over tropics are...
Abstract In this study, the effect of a scale‐aware convective parameterization scheme (CPS) on simulation heavy precipitation in gray‐zone was investigated using Weather Research and Forecasting (WRF) model. We performed WRF simulations with Kain–Fritsch (KF) (non‐scale‐aware), Multiscale (MSKF) (scale‐aware), explicit convection (i.e., no CPS). The MSKF uses parameter that modulates available potential energy (CAPE) timescale entrainment process KF as function horizontal grid spacing....
Abstract Precipitation predictability using the non‐scale‐aware and scale‐aware convective parameterization schemes (CPSs) was investigated to assess necessity of CPSs within gray‐zone. This study evaluates performance Weather Research Forecasting (WRF) model's CPS for 135 heavy rainfall events (HREs) over Korean Peninsula 10 years (i.e., 2011–2020). We tested Kain–Fritsch (KF) scheme (non‐scale‐aware) Multi‐scale (MSKF) (scale‐aware) in WRF model. The MSKF shows an overall improved...
Abstract Norovirus (NoV), a single‐stranded, positive RNA virus, is an important etiologic agent of acute gastroenteritis in children worldwide. In this study, total 434 fecal samples collected from with Seoul, between September 2007 and July 2008 were tested to determine the molecular epidemiology NoVs characterize recombinant strains by using RT‐PCR followed sequencing. Of specimens, NoV, rotavirus, adenovirus detected 155 (35.8%), 72 (16.6%), 19 specimens (4.3%), respectively. NoV GI was...
Abstract Under assumptions of horizontal homogeneity and isotropy, one may derive relations between rotational or divergent kinetic energy spectra velocities along one-dimensional tracks, such as might be measured by aircraft. Two recent studies, differing in details their implementation, have applied these to the Measurement Ozone Water Vapor Airbus In-Service Aircraft (MOZAIC) dataset reached different conclusions with regard mesoscale ratio energy. In this study accuracy method is...
In 2016, the westerly quasi-biennial oscillation (WQBO) in equatorial stratosphere was unprecedentedly disrupted by westward forcing near 40 hPa; this followed another disruption 2020. Strong extratropical Rossby waves propagating toward tropics were considered main cause of disruptions, but why zonal wind is reversed only middle WQBO remains unclear. Here, we show that strong winds lower (70 to 100 hPa) help disrupt hindering reversal at its base. They also propagate further upward,...
Abstract. An idealized baroclinic instability case is simulated using a ∼ 10 km resolution global model to investigate the characteristics of gravity waves generated in life cycle. Three groups appear around high-latitude surface trough at mature stage wave. They have horizontal and vertical wavelengths 40–400 2.9–9.8 km, respectively, upper troposphere. The two-dimensional phase-velocity spectrum arc shaped with peak 17 m s−1 eastward. These difficulty propagating upward through...
Abstract In numerical weather prediction models, the typhoon track and intensity forecast performances are highly sensitive to physics parameterization schemes. To investigate impact of schemes on real‐time short‐term forecasts, we simulated six typhoons which directly/indirectly affected South Korea region in recent years using Weather Research Forecasting (WRF) model. Three cumulus (CPSs) Kain‐Fritsch (KF), Betts‐Miller‐Janjić (BMJ), modified Tiedtke (TDK), two cloud microphysics (MPSs)...
Abstract. This paper describes the splitting supercell idealized test case used in 2016 Dynamical Core Model Intercomparison Project (DCMIP2016). These storms are useful beds for global atmospheric models because horizontal scale of convective plumes is O(1 km), emphasizing non-hydrostatic dynamics. The simulates a on reduced-radius sphere with nominal resolutions ranging from 4 to 0.5 km and based work Klemp et al. (2015). Models initialized an environment conducive formation forced small...
Abstract Spurious mountain-wave features have been reported as false alarms of light-or-stronger numerical weather prediction (NWP)-based cruise level turbulence forecasts especially over the western mountainous region North America. To reduce this problem, a hybrid sigma–pressure vertical coordinate system was implemented in NOAA’s operational Rapid Refresh model, version 4 (RAPv4), which has running parallel with conventional terrain-following RAP 3 (RAPv3). Direct comparison velocity |w|...