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http://dx.doi.org/10.11629/jpaar.2019.15.2.045

Trends of the PM2.5 concentrations and high PM2.5 concentration cases by region in Korea  

Yeo, Minju (Department of Environmental Science and Engineering, Ewha Womans University)
Kim, Yongpyo (Department of Chemical Engineering and Materials Science, Ewha Womans University)
Publication Information
Particle and aerosol research / v.15, no.2, 2019 , pp. 45-56 More about this Journal
Abstract
The public's concern on ambient $PM_{2.5}$ has been increasing in Korea. We have estimated (1) the annual and monthly mean $PM_{2.5}$ concentrations, (2) the frequency by the $PM_{2.5}$ concentration interval, and (3) the high concentration occurrence duration time between 2015 and 2018 at 16 administration regions. We found that there have been differences in all three above parameters' trends among the studied 16 regions in Korea. Still, Jeonbuk showed the highest rank in all three parameters' trends. In Jeonbuk, the average $PM_{2.5}$ concentration and the sum of the frequency fraction when the $PM_{2.5}$ concentration being over $75{\mu}g/m^3$ between 2016 and 2018 was $28.4{\mu}g/m^3$ and 9.0%, respectively. And the days when the $PM_{2.5}$ concentration is over $50{\mu}g/m^3$ between 2015 and 2018 were 149. Chungbuk was the only region with the increasing trend of $PM_{2.5}$ concentration between 2016 and 2018. And in Seoul and Gyeonggi, the average $PM_{2.5}$ concentrations decreased whereas the high concentration frequency fraction increased between 2016 and 2018. Also, it is found that there have been differences in the trends of the frequency by the $PM_{2.5}$ concentration interval and the high concentration occurrence duration time between $PM_{10}$ and $PM_{2.5}$.
Keywords
$PM_{2.5}$ concentration; Frequency by $PM_{2.5}$ concentration interval; High concentration occurrence duration; Regional difference;
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