Abstract View
A Study on Elevated Concentration of Fine Particles at Urban and Agricultural Sites in Korea
JIHO JANG, Haebum Lee, Minhan Park, Joonwoo Kim, Nohhyeon Kwak, Taewoong Gong, Ilhwa Seo, Dahye Oh, Seunghye Lee, Kihong Park, Gwangju Institute of Science and Technology
Abstract Number: 675
Working Group: Aerosol Chemistry
Abstract
Chemical components (ions, elements, organic carbon (OC), elemental carbon (EC)) of PM2.5 were measured at urban Gwangju and agricultural Gimje sites in Korea to determine major factors for elevated PM2.5 concentration (PM2.5 event). The PM2.5 event was defined when the daily PM2.5 mass concentration was higher than 35 μg/m3 in summer and 50 μg/m3 in winter. Data suggest that the PM2.5 event in summer at urban Gwangju site was mainly affected by secondary sulfate formation and vehicle emission, and that in winter secondary nitrate and sulfate formation and biomass burning under the stagnant condition played important roles in the PM2.5 event. At agricultural Gimje site, the biomass burning and formation of secondary nitrate contributed to the elevated concentration of fine particles in summer. The ammonia rich environment at the agricultural site played important roles in the PM2.5 event as well as new particle formation (NPF) event. More comparisons between two sites including source apportionment for PM2.5 are being progressed and will be presented.