A5044782365- Atmospheric chemistry and aerosols
- Air Quality and Health Impacts
- Atmospheric Ozone and Climate
- Air Quality Monitoring and Forecasting
- Atmospheric aerosols and clouds
- Atmospheric and Environmental Gas Dynamics
- Marine and coastal ecosystems
- Vehicle emissions and performance
- Odor and Emission Control Technologies
- Energy and Environmental Systems
- Toxic Organic Pollutants Impact
- Advanced Chemical Sensor Technologies
- Industrial Gas Emission Control
- Aerosol Filtration and Electrostatic Precipitation
- Climate variability and models
- Ecology and Conservation Studies
- Oceanographic and Atmospheric Processes
- Water Quality Monitoring and Analysis
- Arctic and Antarctic ice dynamics
- Agriculture, Soil, Plant Science
- Ocean Acidification Effects and Responses
- Plant responses to elevated CO2
- Electrohydrodynamics and Fluid Dynamics
- Cyclone Separators and Fluid Dynamics
- Indoor Air Quality and Microbial Exposure
Korea University
2016-2025
University of Rhode Island
1991-1998
Korea Institute of Ocean Science and Technology
1998
The organic compound tracers of atmospheric particulate matter, as well carbon (OC) and elemental (EC), have been characterized for samples acquired during the Asian Pacific Regional Aerosol Characterization Experiment (ACE‐Asia) from Gosan, Jeju Island, Korea, Sapporo, Japan, Chichi‐jima Island in western North Pacific, on National Oceanic Atmospheric Administration R/V Ronald H. Brown . Total extracts were analyzed by gas chromatography–mass spectrometry to determine both polar aliphatic...
In support of the first Tropospheric Ozone Assessment Report (TOAR) a relational database global surface ozone observations has been developed and populated with hourly measurement data enhanced metadata. A comprehensive suite products including standard statistics, health vegetation impact metrics, trend information, are made available through common portal web interface. These form basis TOAR analyses focusing on human health, vegetation, climate relevant issues, which part this special...
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...
Historical records in association with Asian dust events were retrieved from ancient Korean literature, which conjunction modern observations, indicate that have occurred most frequently the springtime during last two centuries. Recent observations through surface network exhibit took place more often western part of peninsula over 20 years. In this study, cases, April 1998 and January 1999, selected to examine detailed conditions favorable for generation, emission, transport Korea...
The temperature-dependent solubilities of hydrogen peroxide (H2O2), hydroxymethyl hydroperoxide (HOCH2O2H), methyl (CH3O2H), peroxyacetic acid (CH3C(O)O2H), and ethyl (C2H5O2H) were determined under conditions used in the aqueous collection analysis atmospheric hydroperoxides. Henry's law was obeyed over source concentration range employed, nominally 10-6−10-2 M. Measurements made using either pH = 3 or 6 solutions. temperatures investigated ranged from 4 to 28 °C. A solution for experiments...
The limited understanding of black carbon (BC) aerosol emissions from incomplete combustion causes a poorly constrained anthropogenic climate warming that globally may be second only to CO2 and regionally, such as over East Asia, the dominant driver change. relative contribution atmospheric BC fossil fuel versus biomass is important constrain stronger forcer. source apportionment underpinning for targeted mitigation actions. However, technology-based "bottom-up" emission inventories are...
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...
The measurement of atmospheric aerosol was made in Seoul during the spring 1998. objective this study to investigate chemical characteristics with an emphasis on effect Asian dust. Total suspended particles (TSP) and smaller than 10 μm (PM ) were collected March‐May For PM , water‐soluble ions trace elements analyzed: NO 3 − SO 4 2− Na + NH K Mg 2+ Ca Na, Mg, Al, Ca, Fe, Mn, Cr, Co, Cu, Zn, Cd, Pb. All data sorted into three groups basis intensity dust observed Seoul: nondust, regular dust,...
Hydrogen peroxide, organic hydroperoxide species, and formaldehyde were found to be enhanced within biomass burning plumes during the Transport Atmospheric Chemistry near Equator ‐ Atlantic (TRACE A) experiment. This enhancement could have resulted from direct emission by fires or secondary photochemical production. In this study, production of is proposed examined through comparisons measurements, obtained three fire flights in TRACE A, with model estimates, other measurement data, results...
Atmospheric aerosol samples ( n = 84) were collected at Gosan site, Jeju Island, South Korea between April 2003 and 2004 for the measurements of total nitrogen (TN) its isotopic ratio δ 15 N) as well species (NH 4 + NO 3 − ). Measurements also conducted remained (remained removed (removed on HCl fume treatment. A pronounced seasonal variation was found in N TN, (mostly NH ), The highest mean values TN (+16.9‰ ± 4.5‰) (+20.2‰ 5.2‰) are detected summer (June–August) whereas lowest (+12.9‰ 3.4‰...
The NASA GTE TRACE A mission sampled air over the South Atlantic and western Indian Oceans. Thirteen flight legs were flown within marine boundary layer (MBL). MBL was typically cleanest (e.g., CH 4 < 1680 ppb, CO 70 C 2 H 6 400 ppt, 3 8 40 NO x 15 midday 5 ppt) but overlain by polluted air. photochemistry of influenced oceanic emissions, surface deposition, entrainment pollutants from aloft. Chemical budgets constructed for several species in order to investigate these effects are...
Aerosol samples ( n = 84) were collected continuously from April 2003 to 2004 at Gosan site in Jeju Island, South Korea. The analyzed for diacids, ketoacids, and α ‐dicarbonyls, as well organic carbon (OC), elemental (EC), water‐soluble (WSOC), inorganic ions. Oxalic acid (C 2 ) was the most abundant followed by malonic 3 all seasons. mean concentration (784 ng m −3 of total diacids –C 12 their relative abundances species detected, OC WSOC found be highest summer, whereas those ketoacids...
Source quantification of carbonaceous aerosols in the Chinese outflow regions still remains uncertain despite their high mass concentrations. Here, we unambiguously quantified fossil and nonfossil contributions to elemental carbon (EC) organic (OC) total suspended particles (TSP) from a regional receptor site Northeast China using radiocarbon measurement. OC EC concentrations were lower summer, representing mainly marine air, than other seasons, when air masses mostly traveled over...
South Korea has recently achieved developed country status with the second largest megacity in world, Seoul Metropolitan Area (SMA). This study provides insights into future changes air quality for rapidly emerging megacities East Asian region. We present total OH reactivity observations SMA conducted at an urban site (May–June, 2015) and a suburban forest (Sep, 2015). The during daytime was observed similar levels (∼15 s<sup>−1</sup>) to those previously reported from other studies. Trace...
Abstract. For PM2.5 filter samples collected daily at the Chinese Research Academy of Environmental Sciences (Beijing, China) from December 2013 to February 2014 (the winter period), chemical characteristics and sources were investigated with an emphasis on haze events in different alert levels. During 3 months, average concentration was 89 µg m−3, exceeding national standard 75 m−3 24 h. The maximum 307 which characterizes developed-type pollution (PM2.5 / PM10>0.5) World Health...
In this study, the volume mixing ratio of 55 volatile organic compound (VOC) species was measured every hour using online TD-GC-FID system during period from January 2018 to December 2019 in Seoul. The most abundant were ethane (10.0 ppbv) and toluene (4.1 ppbv), with alkanes aromatics accounting for 57.5% 31.5% total VOCs (TVOC), respectively. ratios TVOC markedly higher July November, mainly owing presence alkanes, respectively, but lower other months, without any significant differences...
Hydrogen peroxide and methylhydroperoxide were measured in the troposphere over western North Pacific as part of airborne portion NASA's Global Tropospheric Experiment/Pacific Exploratory Mission‐West A field mission. The flights circled Pacific, focusing on extended from 300 to 13,000 m altitude. hydroperoxides uniquely separated quantified using a high‐pressure liquid chromatography system conjunction with continuous enzyme fluorometric instrument. Results show latitudinal gradient both...