Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Acidity and Chemical Composition of Precipitation at Background Area of the Korean Peninsula (Anmyeon, Uljin, Gosan)

한반도 배경지역 (안면, 울진, 고산) 상수의 산성도와 화학특성

  • Kim, Sang-Baek (Korea Global Atmosphere Watch Observatory / METRI / KMA) ;
  • Choi, Byoung-Cheol (Korea Global Atmosphere Watch Observatory / METRI / KMA) ;
  • Oh, Suk-Yeong (Korea Global Atmosphere Watch Observatory / METRI / KMA) ;
  • Kim, San (Environment Research Institute / Shinsung University) ;
  • Kang, Gong-Unn (Department Of Environmental Industry, Wonkwang Health Science College)
  • 김상백 (기상연구소 지구대기삼시관측소) ;
  • 최병철 (기상연구소 지구대기삼시관측소) ;
  • 오숙영 (기상연구소 지구대기삼시관측소) ;
  • 김산 (신성대학 환경연구소) ;
  • 강공언 (원광보건대학 환경공학과)
  • Published : 2006.02.01
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Abstract

Precipitation samples were collected at Anmyeon (1997 - 2004), Uljin, and Gosan (1998 ~ 2004), the background area of the Korean Peninsula. These samples were analyzed for the concentration of 9 major ionic components ($F^{-}$,$Cl^{-}$, $NO_{3}^{-}$, $SO_{4}^{2-}$, $Na^{+}$, $NH_{4}^{+}$, $K^{+}$, $Mg^{2+}$, $Ca^{2+}$) with including a pH and an electric conductivity. Data quality for these samples was verified by ion balance and conductivity balance which are based on GAW manual for precipitation chemistry and the number of valid data at Anmyeon, Uljin, and Gosan is 249, 173, and 188, respectively. During the study period, the precipitation-weighted average pH at Anmyeon, Uljin, and Gosan was found to be 4.81, 4.87 and 4.89, respectively and each annual average pH was showed below pH 5.6 for every site. From the frequency survey on the precipitation acidity, the occurrence rate of acid rain below pH 5.6 is greater than $80\%$ for every site. Particularly, the highest occurrence rate for strong acid rain below pH 4.5 was found at Anmyeon, $32.1\%$, compared with other sites ($10.4\%$ at Uljin, $15.4\%$ at Gosan). That's because acidifying species (nss-$SO_{4}^{2-}$, $NO_{3}^{-}$) are remarkably high concentration at Anmyeon.

Keywords

References

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