A5101490502- Geophysics and Gravity Measurements
- Meteorological Phenomena and Simulations
- Ionosphere and magnetosphere dynamics
- Ocean Waves and Remote Sensing
- Climate variability and models
- Atmospheric aerosols and clouds
- Atmospheric Ozone and Climate
- Acne and Rosacea Treatments and Effects
- Oceanographic and Atmospheric Processes
- Atmospheric and Environmental Gas Dynamics
- Remote Sensing and Land Use
- Plant chemical constituents analysis
- melanin and skin pigmentation
- Innovation in Digital Healthcare Systems
- Sex and Gender in Healthcare
- Space exploration and regulation
- Environmental and Agricultural Sciences
- Geomagnetism and Paleomagnetism Studies
- Reservoir Engineering and Simulation Methods
- Particle Detector Development and Performance
- Vasculitis and related conditions
- Greenhouse Technology and Climate Control
- Skin Protection and Aging
- Syphilis Diagnosis and Treatment
- Solar Radiation and Photovoltaics
Korea Meteorological Administration
2020-2023
Korea Institute of Atmospheric Prediction Systems
2015-2020
Yonsei University
1998-2012
Sungkyunkwan University
2001
Samsung (South Korea)
2001
Abstract A subgrid orographic parameterization (SOP) is updated by including the effects of anisotropy and flow‐blocking drag (FBD). The impact SOP on short‐range forecasts investigated using a global atmospheric forecast model applied to heavy snowfall event over Korea 4 January 2010. When updated, in lower troposphere noticeably increases owing additional FBD mountainous regions. enhanced directly weakens excessive wind speed low indirectly improves temperature mass fields East Asia. In...
The realism of ray‐based spectral parameterization convective gravity wave drag, which considers the updated moving speed source and multiple propagation directions, is tested against Atmospheric Infrared Sounder (AIRS) onboard Aqua satellite. Offline calculations are performed using global reanalysis data for January July 2005, temperature variances (GWTVs) calculated at z = 2.5 hPa (unfiltered GWTV). AIRS‐filtered GWTV, directly compared with AIRS, by applying AIRS visibility function to...
The ray‐based spectral parameterization of convective gravity wave drag, which explicitly calculates the propagation properties, is validated against Microwave Limb Sounder (MLS) on Upper Atmosphere Research Satellite (UARS). Offline calculations are performed using global reanalysis data and temperature variances calculated from compared with those measured MLS. parameterized packets that visible MLS to allow for comparison. visibility analytically obtained three‐dimensional filter...
Abstract Background Livedoid vasculitis is a chronic disorder manifested as recurrent, painful, reticulated, and ulcerative lesions of the legs, which result in ivory atrophic scars with peripheral telangiectasia hyperpigmentation. Its etiology remains obscure therapy difficult. In this study, we evaluated clinical efficacy psoralen plus UVA (PUVA) its side‐effects treatment livedoid vasculitis. Methods Eight South Korean patients were treated 8‐methoxypsoralen (8‐MOP). Systemic PUVA was...
Abstract The parametrization of orographic drag processes is a major source circulation uncertainty in models. COnstraining ORographic Drag Effects (COORDE) project makes coordinated effort to narrow this by bringing together the modeling community to: explore variety parametrizations employed current operational models; assess resolution sensitivity resolved and parametrized across validate low‐resolution simulations using explicitly from high‐resolution simulations. Eleven models eight...
Abstract The effect of drag due to subgrid orography with turbulent scales, the so‐called orographic form drag, is introduced by revising surface exchange coefficient for momentum, alleviate overall positive bias in wind speed near‐surface and low‐level troposphere over land. Also, excessive flow‐blocking responsible negative biases highly complex terrains, abated modifying height blocked layer, which achieved without a significant deficiency total because additional drag. impact revised...
Abstract The impact of subgrid orographic drag on weather forecasting and simulated climatology over East Asia in boreal summer is examined using two parameterization schemes a global forecast model. consider gravity wave (GWD) with without lower‐level breaking (LLWD) flow‐blocking (FBD). Simulation results from sensitivity experiments verify that the scheme LLWD FBD improves intensity summertime continental high northern part Korean Peninsula, which exaggerated GWD only. This because...
Abstract Vertically propagating low‐frequency inertia‐gravity waves (IGWs) are retrieved from meteor radar winds observed at King Sejong Station (KSS: 62.22°S, 58.78°W), Antarctica. IGW horizontal extracted temporal band‐pass filtering in regular time‐height bins show the frequent occurrence of IGWs with downward phase progression and counterclockwise rotation their wind vectors time (i.e., upward energy propagation) near mesopause region throughout whole year 2014. The vertical wavelengths...
Abstract The effects of a nonlocal planetary boundary layer (PBL) scheme that considers scale dependency in the parameterized turbulent vertical transport are investigated for case wintertime lake-effect precipitation over Korea at gray-zone resolutions using mesoscale model. An experiment scale-aware PBL is compared with conventional scheme, which shows simulated amount resolution less than 1 km smaller scheme. role processes simulating understood through interaction microphysical...
Accurate initial soil moisture conditions are essential for numerical weather prediction models, because they play a major role in land–atmosphere interactions. This study constructed data assimilation system and evaluated its impacts on the Global Data Assimilation Prediction System based Korea Integrated Model (GDAPS-KIM) to improve forecast skill. Soil retrieved from Advanced Scatterometer (ASCAT) onboard Meteorological Operational Satellite was assimilated into GDAPS-KIM using ensemble...
In numerical models, the amount of clouds affects atmospheric temperature through interaction with radiation. Korean Integrated Model (KIM), which has been in operation at Korea Meteorological Administration since April 2020, is determined from prognostic equation consisting source and sink terms  by  physical processes such as planetary boundary layer (PBL) mixing, convection, advection, condensation, evaporation. control KIM version, forcing used for calculating rate...
군사작전을 수행함에 있어 기상은 중요한 요소이며 다양한 방법으로 극복해야할 대상이다. 특히, 정찰위성을 통해 지상을 관측하기 위해서는 광학장비를 운용할 경우 구름 등 차폐물이 없어야 영상 획득이 가능하다. 본 연구에서는 북한지역에 대해 기상요소 중 전운량에 초점을 두고 분석을 진행하였다. 기본 데이터는 기상청에서 제공하는 공개 자료를 활용하였으며, 2013년부터 2022년까지 10년 동안 측정된 빅데이터 분석 처리하였다. 북한지역 27개 측정소에서 매일 3시간 간격으로 8회씩 측정한 자료 약 78만여 건을 활용하여 주야간, 계절별, 월별, 지역별 전운량 변화량을 분석하였다. 광학장비 운용조건인 주간 맑은 날씨는 전체의 20.8%에 불과하였고, 야간 전체 16.6%에 불과하였다. 계절적으로는 한반도 기후 특성상 여름철은 타 계절과 다소 많은 차이를 보였으며, 7.3%, 8.4% 만이 날씨로 분석되었다. 뿐만 아니라 지역적으로도 기상 측정소 중에서 7개소는 날씨가 20% 미만으로...
The Korean Integrated Model (KIM), operated by Meteorological Administration (KMA) since April 2020, has been improved through continuous updates on model physical processes and data assimilation. As the version was updated, performance substantially during summer season, but improvement not clear in winter. Therefore, this study, we examine a dropout case degrading of KIM northern hemisphere 2022 winter order to investigate causes systematic biases related with season. worst terms 5-day...