안면도 기후변화감시소에서 관측된 산불 기원 바이오매스 연소 에어로졸의 광흡수 특성: 2023년 4월 사례 연구

• Published in: 한국대기환경학회지(국문) Vol. 40; no. 6; pp. 614 - 627
• Main Authors: 박은호(Eunho Park), 김만해(Man-Hae Kim), 한종헌(Jongheon Han), 유희정(Hee-Jung Yoo), 양세환(Se-Hwan Yang), 김수민(Sumin Kim), 김영아(Young-Ah Kim), 원덕진(Dukjin Won), 김상우(Sang-Woo Kim)
• Format: Journal Article
• Language: Korean
• Published: 한국대기환경학회 01.12.2024
• Subjects: 대기과학; Aerosols; Light absorption; Biomass burning; Anmyeondo GAW station; Brown carbon
• ISSN: 1598-7132; 2383-5346
• DOI: 10.5572/KOSAE.2024.40.6.614

This study examined the optical and physical properties of fresh biomass burning aerosols observed at the Anmyeondo Global Atmospheric Watch (GAW) station in April 2023. The fresh biomass burning aerosols exhibited a significantly higher scattering coefficient (567.54±287.14 Mm-1 at 550 nm), approximately five times greater than the station’s April 2023 average (101.67±145.6 Mm-1). Additionally, these aerosols demonstrated markedly increased light absorption (48.23±24.25 Mm-1 at 520 nm), far exceeding the April 2023 average (7.25±8.58 Mm-1). The biomass burning aerosols showed stronger solar absorption, particularly at shorter wavelengths (AÅE370-950: 2.14), indicating substantial light absorption by brown carbon (BrC) aerosol. Within these aerosols, BrC accounted for 64.5±5.7% of total light absorption at 370 nm, considerably higher than the April 2023 average contribution (20.7±20.9%). The elevated BrC contribution, which was relatively higher compared to those reported from field observations of biomass burning plumes, likely resulted from the short travel distance (17 km) between the fire spot and the observation station. This limited distance probably restricted the aging process (e.g., photobleaching) of the biomass burning aerosols. KCI Citation Count: 0