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KMID : 1024520210300060475
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Journal of the Environmental Sciences
2021 Volume.30 No. 6 p.475 ~ p.485
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Characteristics of Fine Particles during Cold Front Passage in Busan, on March 19, 2020
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Jeon Byung-Il
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Abstract
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This research investigated the characteristics of fine particles during cold front passage in Busan, on March 19, 2020. The cold front speed was 17.4 m/s (about 63k km/hr), moving from the northwest to the southeast, and with a width of about 64 km. The backward trajectory analysis showed that a southern sea air parcel flowed into Busan before the cold front passage, carrying continental materials from China transported into Busan after cold front passage. The PM10 concentration in Busan showed a rapid increase after passing through the cold front, with PM2.5 showing a high concentration during cold front passage. The PM2.5/PM10 ratio was 0.10 - 0.30. When the cold front passed, SO42-, NO3-, Ca2+, NH4+, Na+, and K+ in PM2.5 showed a rapid increase, with SO42- showing the most significant increase. These results indicated that understanding the characteristics of fine particles during cold front passage in Busan could provide insight into establishing a strategy to control urban air quality.
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KEYWORD
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Cold front, Backward trajectory, PM10, Ionic element
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