초록 열기/닫기 버튼
The public's concern on ambient PM2.5 has been increasing in Korea. We have estimated (1) the annual and monthly mean PM2.5 concentrations, (2) the frequency by the PM2.5 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 PM2.5 concentration and the sum of the frequency fraction when the PM2.5 concentration being over 75 ㎍/㎥ between 2016 and 2018 was 28.4 ㎍/㎥ and 9.0%, respectively. And the days when the PM2.5 concentration is over 50 ㎍/㎥ between 2015 and 2018 were 149. Chungbuk was the only region with the increasing trend of PM2.5 concentration between 2016 and 2018. And in Seoul and Gyeonggi, the average PM2.5 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 PM2.5 concentration interval and the high concentration occurrence duration time between PM10 and PM2.5.
The public's concern on ambient <TEX>$PM_{2.5}$</TEX> has been increasing in Korea. We have estimated (1) the annual and monthly mean <TEX>$PM_{2.5}$</TEX> concentrations, (2) the frequency by the <TEX>$PM_{2.5}$</TEX> 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 <TEX>$PM_{2.5}$</TEX> concentration and the sum of the frequency fraction when the <TEX>$PM_{2.5}$</TEX> concentration being over <TEX>$75{\mu}g/m^3$</TEX> between 2016 and 2018 was <TEX>$28.4{\mu}g/m^3$</TEX> and 9.0%, respectively. And the days when the <TEX>$PM_{2.5}$</TEX> concentration is over <TEX>$50{\mu}g/m^3$</TEX> between 2015 and 2018 were 149. Chungbuk was the only region with the increasing trend of <TEX>$PM_{2.5}$</TEX> concentration between 2016 and 2018. And in Seoul and Gyeonggi, the average <TEX>$PM_{2.5}$</TEX> 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 <TEX>$PM_{2.5}$</TEX> concentration interval and the high concentration occurrence duration time between <TEX>$PM_{10}$</TEX> and <TEX>$PM_{2.5}$</TEX>.
