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논문 기본 정보

자료유형
학술저널
저자정보
김득수 (군산대학교) 마휘
저널정보
한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제25권 제6호
발행연도
2009.12
수록면
550 - 561 (12page)

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This study is to investigate the air pollution characteristics of an industrialized midsize west-coastal city by comparing air quality to a neighboring inland city. The hourly averaged data of O₃, SO₂, NO₂, CO, and PM₁? measured from continuous air quality monitoring sites in Gunsan (coastal) and Jeonju (inland) were analyzed. The data set covers the period from 2004 to 2006. The annual average concentrations of the air pollutants in two cities were compared in their abundances and temporal trends as well. O₃ and SO₂ in Gunsan were relatively higher than those in Jeonju, while vice versa in case of NO₂ and PM₁?. It seems that heavy automobile emissions from Jeonju mainly bring on higher NO₂ and PM₁? than those in Gunsan on annual base. NO₂ concentrations in both cities showed bimodal diurnal variations with peaks in the morning and in the late evening. These peaks correspond to the coupled effects of rush hour traffic and meteorological conditions (i.e., variation of mixing height and dispersion conditions). Maximum hourly averages of NO₂ ranged from 18 ppb to 28 ppb at Jeonju, and from 12 ppb to 20 ppb at Gunsan. O₃ showed typical diurnal variation with a maximum in the afternoon between 14:00 and 16:00 LST. Diurnal variations of CO and PM₁? were similar to NO₂ while SO₂ was similar to O3. Seasonal variations of PM₁? in both cities indicated that their concentrations during spring season were significantly high. Asian dust storms occur frequently during spring and seem to affect increase in PM₁?. High O₃ and PM₁? days were selected from both cities. The analyses based on the HYSPLIT trajectory model during the high O₃ and PM₁? showed these episodes (six cases) were mostly coincident with Asian dust storm originated from northern China and Mongolia. However, these high air pollution episodes in the west coastal cities may not only be caused by the Asian dust but also affected by other air pollutants transported from China accompanying the Asian dust.

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Abstract
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