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Korean Meteorological Society (한국기상학회)
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Composition and Neutralization Characteristics of Precipitation at the Anmyeon-do and Gosan GAW Stations from 2008 to 2017

안면도와 고산 기후변화감시소에서 채취한 강수 성분의 조성 및 중화 특성(2008~2017년)

  • Ko, Hee-Jung (Environmental Meteorology Research Division, National Institute of Meteorological Sciences) ;
  • Jeong, Jiyoung (Environmental Meteorology Research Division, National Institute of Meteorological Sciences) ;
  • Kim, Eun-Sil (Environmental Meteorology Research Division, National Institute of Meteorological Sciences) ;
  • Lee, Sang-Sam (Environmental Meteorology Research Division, National Institute of Meteorological Sciences) ;
  • Ryoo, Sang-Boom (Environmental Meteorology Research Division, National Institute of Meteorological Sciences)
  • 고희정 (국립기상과학원 환경기상연구과) ;
  • 정지영 (국립기상과학원 환경기상연구과) ;
  • 김은실 (국립기상과학원 환경기상연구과) ;
  • 이상삼 (국립기상과학원 환경기상연구과) ;
  • 류상범 (국립기상과학원 환경기상연구과)
  • Received : 2019.07.12
  • Accepted : 2019.10.17
  • Published : 2019.11.30
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Abstract

Precipitation samples were collected at the GAW Stations in Anmyeon-do and Gosan for 10 years (2008-2017) to analyze pH, electrical conductivity and NH4+, Na+, K+, Mg2+, Ca2+, SO42-, NO3-, Cl-, and F- ions. From the analysis, the correlation between pH and rainfall, the composition of precipitation and comparison with other regions, and the results of neutralization characteristics by seasonal and pH were determined. In the comparison of ion balance and conductivity for the validation of analytical data, the correlation coefficients were within the range of 0.996~0.999, implying good linear relationship. The volume-weighted pH of the Anmyeon-do and Gosan areas were 4.7 and 4.9, respectively. The pH of the rainfall was affected by washout and rainout in both areas. The ionic strength of precipitation at Anmyeondo and Gosan were 0.42 ± 0.63 mM and 0.37 ± 0.75 mM, indicating about 27.6% and 35.3% of the total precipitation as per a pure precipitation criterion (10-4 M), respectively. The composition ratio of ionic species were 44.7% and 57.5% for marine sources (Na+, Mg2+, Cl-), 40.6% and 22.2% for the secondary inorganic components (NH4+, nss-SO42-, NO3-), and 5.6% and 4.0% for the soil source (nss-Ca2+), respectively. The neutralization factor of Anmyeon-do and Gosan were 0.43~0.65 and 0.34~0.48, and the neutralization factors of calcium carbonate were 0.15~0.34 and 0.25~0.30, respectively. Thus, both regions have the highest rate of neutralization caused by ammonia. As pH increased in Anmyeon-do and Gosan, change in calcium carbonate became greater than that in ammonia.

Keywords

References

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