What is Atmospheric Sciences?
Atmospheric sciences can provide responsible solutions for the global environment, the most challenging issue in the 21st century, and harmonious coexsitence of nature and human beings.
Atmospheric sciences can provide responsible solutions for the global environment, the most challenging issue in the 21st century, and harmonious coexsitence of nature and human beings.
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on August 27, 2026
on July 24, 2026
on November 5, 2021
To understand the carbon cycle at policy-relevant spatial scales, a high density of high-quality CO2 measurement sites is needed. In 2012, the Korea Meteorological Administration (KMA) installed CO2 monitoring systems at Anmyeondo (AMY) in the west, Jejudo Gosan Suwolbong (JGS) in the southwest, and Ulleungdo (ULD) in the east of South Korea. In this presentation their monitoring system, and measurement uncertainty will be presented. We also show the observed CO2 characteristics at each station and comparisons with other east Asia station. The radio carbon (14C) in CO2 was known for the tracer of fossil fuel CO2 contributions. AMY collected air for 14C analysis from 2014 to 2016 to analyze characteristics of fossil fuel CO2. The proxies such as CO and SF6 are used for the calculation of emission ratios from observations to compare to those values from inventories. This study provided information on sources of observed CO2 at AMY and confirms the measurement data can verify and improve reported bottom-up inventories. Here, this result will be discussed briefly.
on November 2, 2021
The first study investigates the production/loss of sulfate on the sea surface during its transport from Eastern China to South Korea. Results of the CMAQ simulation show high sulfate (SO42-) concentrations over the sea surface areas between Eastern China and South Korea despite nearly zero emissions. The results from a quantitative analysis using the integrated process rate (IPR) in CMAQ suggest that increasing SO42- concentrations during the transport was mainly attributable to chemical SO42- productions. The chemical production of SO42- over the Yellow Sea can primarily be attributed to the “aerosol process”, which is mainly dependent on weather conditions (e.g., temperature and wind speed) and concentrations of precursors such as SO2 and OH. The results of the analysis of the mechanism of SO42- formation using the Sulfur Tracking Model (STM) show that most chemical SO42- production on the surface of the Yellow Sea is the result of the aqueous-phase chemical reactions following the SO2 oxidation reaction (OH + SO2 → H2SO4 + HO2). The second study presents an analysis of high surface ozone (O3) episodes occurring in a rural area (Chuncheon), which is situated 70 km to the prevailing westerly downwind direction of Seoul Metropolitan Area. Although Chuncheon has much lower emission levels than Seoul, the daily mean and maximum O3 levels were higher in Chuncheon than those in Seoul during the episode days. Results of CMAQ simulation demonstrate that the O3 concentration in the air mass moving from Seoul to Chuncheon was very sensitive to the concentration of nitrogen oxide (NOx) because of abundant biogenic volatile organic compounds (BVOCs). The IPR results also show that the NOx emitted from Seoul strongly affected the high O3 levels over its downwind area, mainly with local BVOC emissions. The produced O3 was gradually accumulated during its transport downwind, leading to an O3 concentration maximum at Chuncheon.
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