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http://dx.doi.org/10.5322/JESI.2014.23.2.249

Numerical Study on the Characteristics of High PM2.5 Episodes in Anmyeondo Area in 2009  

Jeon, Won-Bae (Institute of Environment Studies, Pusan National University)
Lee, Hwa Woon (Division of Earth Environmental System, Pusan National University)
Lee, Soon-Hwan (Department of Earth Science Education, Pusan National University)
Park, Jae-Hyeong (Division of Earth Environmental System, Pusan National University)
Kim, Hyun-Goo (Korea Institute of Energy Research)
Publication Information
Journal of Environmental Science International / v.23, no.2, 2014 , pp. 249-259 More about this Journal
Abstract
This paper investigates the characteristics of high $PM_{2.5}$ episodes occurred at Anmyeondo area in spring time, 2009. The monthly mean $PM_{2.5}$ concentration during April was the highest in the year and especially, high levels of $PM_{2.5}$ exceeding standard regulation level were sustained consecutively during 5 to 13 April. To analyze more detailed $PM_{2.5}$ characteristics, numerical simulations were carried out using CMAQ(Community Multi-scale Air Quality) with IPR(Integrated Process Rate) and DDM-3D(Decoupled Direct Method). $PM_{2.5}$ level was lower in daytime than that in nighttime due to vigorous vertical mixing during daytime. The chemical composition was showed that ratio of primary ion components such as sulfate($SO_4{^{2-}}$), nitrate($NO_3{^-}$) and ammonium($NH_4{^+}$) were nearly half of total amount of $PM_{2.5}$. Aerosol and transport process dominantly contributed to $PM_{2.5}$ concentration in Anmyeondo area and contribution rate of local emissions was nearly zero since Anmyeondo area has rare anthropogenic PM emission sources. DDM-3D analysis result showed that $PM_{2.5}$ in Anmyeondo area was influenced by emissions from Shanghai and Shandong region of China.
Keywords
$PM_{2.5}$; CMAQ; DDM; Coastal region;
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