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노천소각 발생 시 드론을 이용한 대기 안정도에 따른 연직 PM2.5 분포 비교
글쓴이 관리자 (IP: *.223.176.122) 작성일 2021-03-31 17:47 조회수 460
노천소각 발생 시 드론을 이용한 대기 안정도에 따른 연직 PM2.5 분포 비교
Comparison of the Vertical PM2.5 Distributions according to Atmospheric Stability Using a Drone during Open Burning Events

Abstract
Biomass burning in rural areas is one of the major particulate matter (PM) emission sources. Open burning events frequently occur during post- and pre-agricultural activities in early and late winter, resulting in high PM2.5 concentration episodes immediately near emission sources. We have investigated the wintertime vertical PM2.5 distribution on three open burning days and three non burning days in the morning in the lower atmospheric boundary layer according to atmospheric stabilities. A drone has been utilized to measure the vertical distributions of air temperature, PM2.5, BC (black carbon), and O3 concentrations at 40, 80, 120, 160, 200, and 250 m heights in a rural area near an industrial complex. On open burning days, ground PM2.5 concentrations increased up to 169 μg m-3 at 9 AM while the closest urban PM2.5 concentration was only 33 μg
m-3. On non burning days, the difference in ground PM2.5 concentrations at most 23 μg m-3. The PM2.5 on open burning days was accumulated in the stable boundary layer (below 80 m above ground level) at 8 and 9 AM in the morning due to the suppressed vertical mixing of emitted PM2.5. The vertical gradients of PM2.5 concentration, then, became reduced after solar heating on ground activates atmospheric mixing. Consequently, the atmospheric stability in the early morning plays an important role in vertical mixing of emitted PM2.5 and increasing ground PM2.5 concentrations during open burning events.

Key words
PM2.5, Open burning, Atmospheric stability, Vertical distribution, Drone

▶출처 : 한국대기환경학회지 제 36 권 제 1 호, 2020.02
파일 노천소각 발생 시 드론을 이용한 대기 안정도에 따른 연직 PMSUB2.5SUB 분포 비교 (1).pdf(816.1K)