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KMID : 1024520120210070815
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Journal of the Environmental Sciences
2012 Volume.21 No. 7 p.815 ~ p.824
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Meteorological Characteristics of the Wintertime High PM10 Concentration Episodes in Busan
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Jeon Byung-Il
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Abstract
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The purpose of this study was to analyze the meteorological characteristics of wintertime high PM10 concentration
episodes in Busan. PM10 concentration has been reduced for the past four years and recorded near or exceeded 100 ㎍/㎥(national standard of PM10). High concentration episodes in Busan were 6 case, PM2.5/PM10 ratio was 0.36∼0.39(mean0.55). High PM10 concentration occurred during higher air temperature, more solar radiation and sunshine, lower relative humidity, and smaller cloud amount. Synoptically, it also occurred when Busan was in the center or the edge of anticyclone and when sea breeze intruded. An analysis of upper air sounding showed that high PM10 concentration occurred when surface inversion layer and upper subsidence inversion layer existed, and when boundary layer depth and vertical mixing coefficient were low. An analysis of backward trajectory of air mass showed that high PM10 concentration was largely affected by long range transport considering that it occurs when air mass is intruded from China.
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KEYWORD
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Fine particle concentration, Anticyclone, Sea breeze, Inversion layer, Boundary layer, Backward trajectory
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