A11G-0142
OC and EC Observed at Gosan Climate Observatory (GCO) and Their Seasonal Characteristics During Haze Events
Monday, 14 December 2015
Poster Hall (Moscone South)
Taekyu Joo1, Saehee LIM1, Jihyun Han2, Meehye Lee3, Sang-Woo Kim4, Beomcheol Shin5 and Minkook Han6, (1)Korea University, Seoul, South Korea, (2)Korea University, Earth & Environmental Sciences, Seoul, South Korea, (3)Korea Univ, Seoul, South Korea, (4)Seoul National University, Seoul, South Korea, (5)National Institute of Meteorological Research, Asian Dust Research Laboratory, Seoul, South Korea, (6)Gosan Climate Observatory, Jeju, South Korea
Abstract:
Organic carbon (OC) and elemental carbon (EC) in PM2.5 were measured with SUNSET OCEC Field Analyzer at Gosan Climate Observatory (GCO) in Jeju, South Korea from October 2009 to December 2014. The mean and 99th percentile concentrations of OC and EC were 2.0±1.4μg/m3, 6.7μg/m3, 0.7±0.5μg/m3, and 2.6μg/m3, respectively. Most of higher concentrations were observed upon haze incident. For haze events, the mean and 90th percentile concentrations of OC and EC were 4.0±3.0μg/m3, 6.9μg/m3, 1.5±0.9μg/m3, and 2.7μg/m3, respectively. In particular, the OC to EC ratio and their correlation was different from season to season. While the correlation was the best in winter from Dec. to Feb. (r=0.9), the ratio of OC to EC was the highest (3.2) in fall from Oct. to Nov. These results suggest OC and EC are robust indicator for haze occurrence and deliver its source signature that is different in each season.
