A5082492342- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Atmospheric aerosols and clouds
- Vehicle emissions and performance
- Air Quality Monitoring and Forecasting
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Prostate Cancer Diagnosis and Treatment
- Odor and Emission Control Technologies
- Fire effects on ecosystems
- Prostate Cancer Treatment and Research
- Fire dynamics and safety research
- Urologic and reproductive health conditions
- Biodiesel Production and Applications
- Hormonal and reproductive studies
- Industrial Gas Emission Control
- Aeolian processes and effects
- Water Quality Monitoring and Analysis
- Advanced Chemical Sensor Technologies
- Thermochemical Biomass Conversion Processes
- Environmental Policies and Emissions
- Advanced Combustion Engine Technologies
- Advancements in Photolithography Techniques
- Advanced optical system design
- Catalytic Processes in Materials Science
Hankuk University of Foreign Studies
2016-2025
Memorial Sloan Kettering Cancer Center
2019-2024
Samsung (South Korea)
2021
ORCID
2020
New York Proton Center
2019
McMaster University
2017-2018
Colorado State University
2006-2016
Yong In University
2016
Tongmyong University
2012
Wonkwang University
2002
Ice nucleating particles (INPs) are vital for ice initiation in, and precipitation from, mixed-phase clouds. A source of INPs from oceans within sea spray aerosol (SSA) emissions has been suggested in previous studies but remained unconfirmed. Here, we show that emitted using real wave breaking a laboratory flume to produce SSA. The number concentrations laboratory-generated SSA, when normalized typical total the marine boundary layer, agree well with measurements diverse regions over...
Dust in the Clouds Sulfate aerosols have greatest radiative impact on climate systems. Harris et al. (p. 727 ) report that oxidation of sulfur dioxide gas, catalyzed by natural transition metal ions mostly surface coarse mineral dust, is dominant pathway for sulfate production clouds. In view growing emissions from large, industrializing countries, including this process models should improve agreement between and observations.
Despite growing interest in the visible light‐absorbing organic component of atmospheric aerosols, referred to as “brown” carbon, our knowledge its chemical composition remains limited. It is well accepted that biomass burning one important source carbon atmosphere. In this study, cloud water samples heavily affected by were collected at Mount Tai (1534 m, ASL), located Shandong province North China Plain summer 2008. The analyzed with high performance liquid chromatography equipped a UV/Vis...
Abstract Atmospheric organic aerosol concentrations depend in part on the gas‐particle partitioning of primary (POA) emissions. Consequently, heating and dilution were used to investigate volatility biomass‐burning smoke particles from combustion common North American trees/shrubs/grasses during third Fire Lab at Missoula Experiment. Fifty eighty percent mass POA evaporated when isothermally diluted plume‐ (~1000 µg m −3 ) ambient‐like (~10 ), while roughly 80% upon 100°C a thermodenuder...
The Korea-United States Air Quality (KORUS-AQ) field study was conducted during May-June 2016. effort jointly sponsored by the National Institute of Environmental Research South Korea and Aeronautics Space Administration United States. KORUS-AQ offered an unprecedented, multi-perspective view air quality conditions in employing observations from three aircraft, extensive ground-based network, ships along with array forecast models. Information gathered is contributing to improved...
Smoke emitted by prescribed and wild fires can make a substantial contribution to ambient aerosol (McMeeking et al. 2006; Park 2007; Spracklen 2007). Approaches investigate these contributions have used variety of different chemical smoke markers, including levoglucosan, produced thermal degradation cellulose, water-soluble potassium (Andreae 1983; Engling Hays 2002; Simoneit 2002;Ward 2006). Filter sampling is commonly employed measure markers in source samples; however, time-integrated...
Abstract. Organic aerosol (OA) is an important fraction of submicron aerosols. However, it challenging to predict and attribute the specific organic compounds sources that lead observed OA loadings, largely due contributions from secondary production. This especially true for megacities surrounded by numerous regional create background. Here, we utilize in situ gas observations collected on board NASA DC-8 during NASA–NIER KORUS-AQ (Korea–United States Air Quality) campaign investigate...
The Korea – United States Air Quality Study (May June 2016) deployed instrumented aircraft and ground-based measurements to elucidate causes of poor air quality related high ozone aerosol concentrations in South Korea. This work synthesizes data pertaining aerosols (specifically, particulate matter with aerodynamic diameters <2.5 micrometers, PM2.5) conditions leading violations Korean standards (24-hr mean PM2.5 < 35 µg m–3). variability from AirKorea monitors across is...
Coarse particulate matter (PM) is a serious air pollution problem in East Asia. Analysis of quality network observations the North China Plain and Seoul Metropolitan Area shows that it mainly anthropogenic has decreased by 21% over 2015-2019. This coarse PM generally not included models but scavenges nitric acid to suppress formation fine (PM2.5) nitrate, major contributor PM2.5 pollution. Including GEOS-Chem model decreases simulated nitrate improve agreement with observations. Decreasing...
The Environmental Protection Agency (EPA) and National Park Service (NPS) initiated a comprehensive field experiment called Big Bend Regional Aerosol Visibility Observational Study (BRAVO) to investigate the source of visibility‐reducing aerosols at Park, Texas. study was carried out over period 4 months starting in first week July 1999. One objective gain insight into atmospheric light‐scattering properties ambient aerosols, especially as they relate their hygroscopicity. This paper will...
Experiments were performed in an environmental chamber to characterize the effects of photo‐chemical aging on biomass burning emissions. Photo‐oxidation dilute exhaust from combustion 12 different North American fuels induced significant new particle formation that increased number concentration by a factor four (median value). The production secondary organic aerosol caused these particles grow rapidly, significantly enhancing cloud condensation nuclei (CCN) concentrations. Using inputs...
Abstract. Cloud water samples were taken in September/October 2010 at Mt. Schmücke a rural, forested area Germany during the Lagrange-type Hill Cap Thuringia (HCCT-2010) cloud experiment. Besides bulk collectors, three-stage and five-stage collector applied analysed for inorganic ions (SO42−,NO3−, NH4+, Cl−, Na+, Mg2+, Ca2+, K+), H2O2 (aq), S(IV), dissolved organic carbon (DOC). Campaign volume-weighted mean concentrations 191, 142, 39 µmol L−1 ammonium, nitrate, sulfate respectively,...
Substantial mitigation of air pollutants emissions has been performed since 2013 around Beijing, and changes in the atmospheric characteristics have expected over downstream area Beijing. In this study, both WRF-Chem simulation on-site measurements were utilized for Baengnyeong (island) supersite, one representative regional background sites located Yellow Sea, entrance long-range transport process Korea. The chemical compositions inorganic aerosols examined spring-time during Chinese...