A5100452211- Atmospheric chemistry and aerosols
- Atmospheric aerosols and clouds
- Atmospheric Ozone and Climate
- Air Quality and Health Impacts
- Atmospheric and Environmental Gas Dynamics
- Air Quality Monitoring and Forecasting
- Climate variability and models
- Arctic and Antarctic ice dynamics
- Meteorological Phenomena and Simulations
- Climate change and permafrost
- Agriculture, Soil, Plant Science
- Oceanographic and Atmospheric Processes
- Cryospheric studies and observations
- Remote Sensing and Land Use
- Marine and Coastal Research
- Soil Moisture and Remote Sensing
- Vehicle emissions and performance
- Water Quality Monitoring and Analysis
- Marine and coastal plant biology
- Marine and fisheries research
- Calibration and Measurement Techniques
- Ruminant Nutrition and Digestive Physiology
- Nutrition, Health and Food Behavior
- Urban Heat Island Mitigation
- Spectroscopy and Laser Applications
Seoul National University
2016-2025
Yonsei University
2020-2024
Korea Institute of Science & Technology Information
2012-2023
Korea Institute of Machinery and Materials
2023
National Institute of Fisheries Science
2018
Samsung (United States)
2015
Gyeongsang National University
2013
National Institute of Animal Science
2012
Chonnam National University
2011
Laboratoire des Sciences du Climat et de l'Environnement
2007-2008
The Geostationary Environment Monitoring Spectrometer (GEMS) is scheduled for launch in February 2020 to monitor air quality (AQ) at an unprecedented spatial and temporal resolution from a geostationary Earth orbit (GEO) the first time. With development of UV–visible spectrometers sub-nm spectral sophisticated retrieval algorithms, estimates column amounts atmospheric pollutants (O3, NO2, SO2, HCHO, CHOCHO, aerosols) can be obtained. To date, all satellite missions monitoring have been low...
This article introduces an international regional experiment, East Asian Regional Experiment 2005 (EAREX 2005), carried out in March–April the east region, as one of first phase experiments under UNEP Atmospheric Brown Cloud (ABC) project, and discusses some outstanding features aerosol characteristics its direct radiative forcing with comparison results obtained another ABC early Maldives Monsoon (APMEX) conducted south region. Time series optical thickness (AOT), single scattering albedo...
Abstract. Recent observations suggest that a certain fraction of organic carbon (OC) aerosol effectively absorbs solar radiation, which is also known as brown (BrC) aerosol. Despite much observational evidence its presence, very few global modelling studies have been conducted because poor understanding BrC emissions. Here we present an explicit simulation in 3-D chemical transport model (GEOS-Chem), including emission estimates from primary (3.9 ± 1.7 and 3.0 1.3 TgC yr−1 biomass burning...
East Asian countries experience severe air pollution owing to their rapid development and urbanization induced by substantial economic activities. South Korea China are among the most polluted with high mass concentrations of PM2.5. Although occurrence transboundary neighboring has been recognized for a long time, studies involving simultaneous ground-based PM2.5 monitoring source apportionment in have not conducted date. This study performed daily Seoul Beijing from January December 2019....
Abstract. Aerosol particles are essential constituents of the Earth's atmosphere, impacting earth radiation balance directly by scattering and absorbing solar radiation, indirectly acting as cloud condensation nuclei. In contrast to most greenhouse gases, aerosol have short atmospheric residence times, resulting in a highly heterogeneous distribution space time. There is clear need document this variability at regional scale through observations involving, particular, situ near-surface...
A regional elastic-scattering lidar network called Asian dust and aerosol observation (AD-Net) has operated for 15 years (since 2001) in East Asia. In this network, the extinction coefficient of aerosols below an altitude 9 km is continuously obtained when conditions are clear; divided into two parts: spherical coefficients. The been compared with several parameters measured by other instruments utilized various studies, including studies on epidemiology dust. Recent expansion system at some...
Abstract. This paper is an overview of the progress in sky radiometer technology and development network called SKYNET. It found that has produced useful on-site calibration methods, retrieval algorithms, data analyses from observations aerosol, cloud, water vapor, ozone. A formula was proposed for estimating accuracy constant F0 using improved Langley (IL) method, which to be a good approximation observed monthly mean uncertainty F0, around 0.5 % 2.4 at Tokyo Rome sites smaller values 0.3...
[1] Vertical dust flux parameterizations were assessed by implementing three different emission schemes, namely, those of Marticorena and Bergametti (1995), Lu Shao (1999), (2004) (hereinafter referred to as MB, LS, S04 respectively) in Weather Research Forecasting with Chemistry (WRF/Chem). Through sensitivity tests, the scattering vertical fluxes resulting from was shown even under condition same horizontal sand flux. The difference between estimated schemes ranges order 101 for 102 clay....
Abstract In January 2016, the Arctic experienced an extremely anomalous warming event after extraordinary increase in air temperature at end of 2015. During this event, a strong intrusion warm and moist downward longwave radiation, as well loss sea ice Barents Kara seas, were observed. Observational analyses revealed that abrupt was triggered by entry Atlantic windstorm into late December 2015, which brought enormous masses to Arctic. Although storm terminated eastern coast Greenland...
Abstract. In order to assess the evolution of aerosol parameters affecting climate change, a long-term trend analysis optical properties was performed on time series from 52 stations situated across five continents. The measured scattering, backscattering and absorption coefficients as well derived single scattering albedo, fraction, Ångström exponents covered at least 10 years up 40 for some stations. non-parametric seasonal Mann–Kendall (MK) statistical test associated with several...
Abstract To estimate global aerosol radiative forcing, measurements of optical properties are made by the National Oceanic and Atmospheric Administration (NOAA) Earth System Research Laboratory (ESRL)’s Global Monitoring Division (GMD) their collaborators at 30 monitoring locations around world. Many sites located in regions influenced specific types (Asian Saharan desert dust, Asian pollution, biomass burning, etc.). This network stations is a shared endeavor NOAA many collaborating...
Abstract The Cloud‐Aerosol Lidar with Orthogonal Polarization (CALIOP) aerosol optical depth (AOD) has been compared the Moderate Resolution Imaging Spectroradiometer (MODIS)‐Aqua AOD using Level 2 products of both instruments. Such comparisons have performed for five different subtypes classified by CALIOP algorithm, namely clean marine, dust, polluted continental, and biomass burning, over ocean from June 2006 to December 2010. MODIS at 550 nm (0.111 ± 0.079) collocated data pairs is about...
We examine O3 production and its sensitivity to precursor gases boundary layer mixing in Korea by using a 3-D global chemistry transport model extensive observations during the KORea-US cooperative Air Quality field study Korea, which occurred May–June 2016. During campaign, observed aromatic species onboard NASA DC-8 aircraft, especially toluene, showed high ratios of up 10 ppbv, emphasizing importance production. To role VOCs NOx chemistry, we first implement detailed scheme model, reduces...
To forecast haze pollution episodes caused by high concentrations of long-range transported pollutants emitted in the areas upstream South Korea, it is crucial to study and identify their behaviour. We analysed three-dimensional air quality structure Seoul using ground observation data aerosol lidar measurements vertical intrusion into Korean Peninsula during spring 2016. The intrusions were particularly affected development atmospheric boundary layer (ABL) leeward regions. nocturnal...
The CALIOP data processing scheme only retrieves extinction profiles in those portions of the return signal where cloud or aerosol layers have been identified by layer detection scheme. In this study we use two years and MODIS to quantify optical depth undetected weakly backscattering layers. Aerosol column-averaged lidar ratio is retrieved from Level 1B (Version 4) profile using AOD as a constraint over oceans March 2013 February 2015. To (ULA), an unconstrained retrieval applied globally...
Abstract. Aerosol particles are a complex component of the atmospheric system which influence climate directly by interacting with solar radiation, and indirectly contributing to cloud formation. The variety their sources, as well multiple transformations they may undergo during transport (including wet dry deposition), result in significant spatial temporal variability properties. Documenting this is essential provide proper representation aerosols condensation nuclei (CCN) models. Using...
Abstract. The Geostationary Environmental Monitoring Spectrometer (GEMS) is a UV-visible (UV-Vis) spectrometer on board the GEO-KOMPSAT-2B (Geostationary Korea Multi-Purpose Satellite 2B) satellite launched into geostationary orbit in February 2020. To evaluate GEMS NO2 total column data, comparison was carried out using vertical density (VCD) that measured direct sunlight Pandora system at four sites Seosan, South Korea, from November 2020 to January 2021. Correlation coefficients between...