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KMID : 1024520160250010107
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Journal of the Environmental Sciences
2016 Volume.25 No. 1 p.107 ~ p.125
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An Analysis of Long-Term Variation of PM10 Levels and Local Meteorology in Relation to Their Concentration Changes in Jeju
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Park Yeon-Hee
Song Sang-Keun
Lee Soo-Jeong
Kim Suk-Woo
Han Seung-Bum
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Abstract
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Long-term variations of PM10 and the characteristics of local meteorology related to its concentration changes were
analyzed at 4 air quality sites (Ido-dong, Yeon-dong, Donghong-dong, and Gosan) in Jeju during two different periods, such as PI (2001-2006) and PII (2007-2013), over a 13-year period. Overall, the long-term trend of PM10 was very slightly downward during the whole study period, while the high PM10 concentrations in PII were observed more frequently than those in PI. The concentration variations of PM10 during the study period was clarified in correlation between PM10 and meteorological variables, e.g. the low (high) PM10 concentration with large (small) precipitation or high (low) radiation and in part high PM10 concentrations (especially, Donghong-dong and Gosan) with strong wind speed and the westerly/northwesterly winds. This was likely to be caused by the transport effect (from the polluted regions of China) rather than the contribution of local emission sources. The PM10 concentrations in “Asian dust” and “Haze” weather types were higher, whereas those in “Precipitation”, “Fog”, and “Thunder and Lighting” weather types were lower. The contribution of long-range transport to the observed PM10 levels in the urban center (Ido-dong, Yeon-dong, and Donghong-dong), if estimated by comparison to the data of the background site (Gosan), was found to explain about 80% (on average) of its input.
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KEYWORD
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Long-term variation, PM10, Transport, Wind speed and direction, Jeju
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