Physico-chemical Characteristics of Submicron Aerosol at West Inflow Regions in the Korean Peninsula III. Physical-Chemical Behavior and Long-range Transport of PM₁

Abstract

Physico-chemical measurement of non-refractory submicron particles (NR-PM 1 ) was conducted in Baengnyeong Island, Korea using Aerodyne High Resolution Time of Flight Aerosol Mass Spectrometer (HR-ToF-AMS) from 2012 to 2014. Organics and ammoniated sulfate were dominant species in NR-PM 1 . The organics was found to have similar fractions (approximate 40%) of NR-PM 1 during the summer and winter, while the sulfate fractions of NR-PM 1 were calculated to be approximately 47% and 31% for the summer and winter, respectively, suggesting the possibility that particles provide non-acidic surfaces for condensation of nitric acid in the winter. The nitrate fractions of approximate 4% and 20% of NR-PM 1 were observed in August (summer) and November (winter), respectively, resulting that the relatively low concentration of sulfate in NR-PM 1 provided a non-acidic surface for nitric acid condensation and formation of particulate ammoniated nitrate is favored thermodynamically in winter. The new particle formation (NPF) event and particle growth rate were analyzed for each month in 2014 using 한반도 서부유입권역에서 대기 중 에어로졸 성분의 물리·화학적 특성 연구 III. 화학적 거동 및 장거리이동 125

Characterization of Aerosol Composition, Concentration, and Sources in Bukhansan National Park, Korea

“…대기 중의 초미세먼지는 직접적으로 흡수 또는 산란 을 통해 시정에 영향을 주며 가시도를 저하시키고 구 름 응결핵으로 작용하면서 기후변화를 초래한다 (Gao et al, 2015;Rastogi et al, 2014;Tao et al, 2014 (Tang et al, 2017;Chen et al, 2016). 국내에서는 초미세먼지를 규제하기 위해 2015 년에 대기환경기준 (PM 2.5 50 μg/m 3 )을 도입하였으며 2018년 현재 초미세먼지 규제 기준은 35 μg/m 3 으로 강 화되었다 (Park et al, 2017;Ham et al, 2016 (Nowak et al, 2013;Kim et al, 2012;Lee et al, 2008). (Pathak et al, 2009).…”

Role of Aerosols in Spring Blooms in the Central Yellow Sea During the COVID-19 Lockdown by China

“…Many studies have reported improved air quality from the reduced anthropogenic aerosol emissions, owing to the enforcement of the COVID-19 lockdown policy (He et al, 2020;Timmermann et al, 2020). Generally, aerosols in the atmosphere are anthropogenic in origin as they are mainly from emissions from Chinese factory operations, motor vehicle pollution, and seasonal dust such as Asian dust (Yu et al, 2013;Park et al, 2017). Aerosols from China can reach the North Pacific Ocean through the Korean Peninsula via the westerlies.…”