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충주시 미세입자 (PM2.5) 농도특성에 대한 사례 연구

Analysis of PM2.5 Case Study Burden at Chungju City

  • 투고 : 2012.07.11
  • 심사 : 2012.09.27
  • 발행 : 2012.10.31

초록

Fine particles ($PM_{2.5}$) were collected and analyzed from April 2010 through January 2011 in Chungju to investigate the characteristics of $PM_{2.5}$ and its ionic species. The annual mean concentrations of $PM_{2.5}$, ${SO_4}^{2-}$, $NO_3{^-}$, and $NH_4{^+}$ in the particulate phase were 40.84, 7.61, 7.14 and $3.74{\mu}g/m^3$, respectively. $PM_{2.5}$ concentrations were higher in fall and spring than in winter and summer. The elevated concentrations episodes are the main factor that enhanced the $PM_{2.5}$ concentrations in the fall. Among the major ionic species ${SO_4}^{2-}$ showed the highest concentration, followed by $NO_3{^-}$ and $NH_4{^+}$, $NO_3^-$ exhibited higher concentrations during the winter, but ${SO_4}^{2-}$ and $NH_4{^+}$ were not showed seasonal variation. The high correlations were found among $PM_{2.5}$, ${SO_4}^{2-}$, $NO_3{^-}$ and $NH_4{^+}$ during all seasons except for spring. The evaluation of backward trajectories and meteorological records show that the highest $PM_{2.5}$ concentration levels occurred during W-NW weather conditions, which influenced by the emission sources of China area. The low pollution levels generally occurred during E-S weather conditions, which influenced by the East Sea and south of the Yellow Sea. The elevated $PM_{2.5}$ mass concentrations arouse the concentration of $NO_3{^-}$, but no effects on ${SO_4}^{2-}$ and $NH_4{^+}$.

키워드

$PM_{2.5}$;Inland area;High concentration;Regional source;Backward trajectory;Seasonal variation;Ionic species

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피인용 문헌

  1. Episodes in Anmyeondo Area in 2009 vol.23, pp.2, 2014, https://doi.org/10.5322/JESI.2014.23.2.249
  2. Acidification and neutralization characteristics of size-fractionated atmospheric aerosols at Gosan site of Jeju Isalnd vol.28, pp.1, 2015, https://doi.org/10.5806/AST.2015.28.1.47
  3. Characteristics of PM2.5 Emission and Distribution in a Highly Commercialized Area in Seoul, Korea vol.31, pp.2, 2015, https://doi.org/10.5572/KOSAE.2015.31.2.097
  4. Influences of Asian Dust, Haze, and Mist Events on Chemical Compositions of Fine Particulate Matters at Gosan Site, Jeju Island in 2014 vol.32, pp.1, 2016, https://doi.org/10.5572/KOSAE.2016.32.1.067

과제정보

연구 과제 주관 기관 : 한국교통대학교