Kim, Jin Young Kim, Sang-Woo Ghim, Young Sung Song, Chul Han Yoon, Soon-Chang 2024-01-20T15:31:54Z 2024-01-20T15:31:54Z 2021-09-05 2012-02 1976-7633 https://pubs.kist.re.kr/handle/201004/129571 We analyzed aerosol optical and chemical properties over Northeast Asia for two pollution episodes caused by contrasting weather conditions, stagnant anticyclone (November, 2011) and fastmoving continental outflow associated with migratory cyclone/anticyclone (February, 2003). Pollution levels were significantly high and even comparable with heavily polluted urban cities in China and Korea even though these levels were from the episodic measurements since Gosan is an internationally well-known remote background site. Space-borne MODIS measurements clearly show that the pollution plume with high aerosol optical depth (AOD) overlaid and very slowly moved over Northeast Asia during the stagnation episode. On the other hand, a strong synoptic wind transported the plume from eastern China to its downwind regions during the continental outflow episode. The two pollution episodes showed discriminative aerosol chemical compositions associated with different source characteristics. Concentrations of nss (non-sea-salt)-sulfates and ammonium in the continental outflow episode were almost two times higher than those in the stagnation episode due to the influence of anthropogenic emissions from China. A higher fraction of nitrate, accompanied with an increase of carbonaceous species in the stagnation episode, was attributable to vehicular emissions originated from Korea. English KOREAN METEOROLOGICAL SOC IMAGING SPECTRORADIOMETER MODIS AIR-POLLUTION CHEMICAL-CHARACTERIZATION ASIAN EMISSIONS ACE-ASIA PM2.5 CHINA SCATTERING INVENTORY OUTFLOW Aerosol properties at gosan in Korea during two pollution episodes caused by contrasting weather conditions Article 10.1007/s13143-012-0003-9 1 ASIA-PACIFIC JOURNAL OF ATMOSPHERIC SCIENCES, v.48, no.1, pp.25 - 33 ASIA-PACIFIC JOURNAL OF ATMOSPHERIC SCIENCES 48 1 25 33 scie scopus kci ART001636127 000300852000003 2-s2.0-84863266753 Meteorology & Atmospheric Sciences Meteorology & Atmospheric Sciences Article IMAGING SPECTRORADIOMETER MODIS AIR-POLLUTION CHEMICAL-CHARACTERIZATION ASIAN EMISSIONS ACE-ASIA PM2.5 CHINA SCATTERING INVENTORY OUTFLOW Pollution continental outflow stagnation chemical composition optical property