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자료유형
학술저널
저자정보
저널정보
한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제22권 제1호
발행연도
2006.2
수록면
99 - 106 (8page)

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Aircraft measurements have been executed for the purpose of monitoring the long range transported air pollution and estimation of air pollutant in/out-flux over the Yellow sea. Total 74 missions of measurements have been done since 1997, mainly in spring and fall. The main study domain was over 124°E~128°E, 35°N~37°N below 3,000 m.
In long-term trends, mixing ratios of SO₂ were around 2 ppbv expect in summer (<1 ppbv). NOx exhibited 2~4 ppbv and have no clear annual trends over the Yellow Sea. The concentrations of O₃ were 51, 58, 41 ppbv in spring, summer and fall-winter, respectively.
Backward trajectory was performed for three days to investigate the source regions of the air mass. Six regions were divided around Korea peninsular centering at 36°N, 126°E. Ⅰ, Ⅱ, Ⅲ, Ⅳ and Ⅴ regions represents in sequence northeast China and Siberia, Sandong peninsula and Balhae gulf, Sanghi and southern China, the south Pacific included Jeju island and the East sea included Japan. L region correspond to the airmass from Korea peninsula. Influx of SO₂ was approximately five times higher than outflux in yearly flux variation and showed a decreasing long-term trend since 1998. NOx outflux was average 0.095 ton/km/hr and three times higher than SO₂ outflux.
In/out flux of O₃ showed even distribution in yearly basis except 2002 (influx 5.45 ton/㎞/hr). The transported amounts from Ⅰ, Ⅱ, Ⅲ regions were much higher than those from other region. In seasonal flux variation, influx levels of gas phases were the lowest in summer and the levels gradually increased from fall toward spring. As a result, transport of pollutants begins from fall and prevails in winter and spring.

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2. 측정 방법

3. 결과 및 고찰

4. 결론

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