AAAR 35th Annual Conference October 17 - October 21, 2016 Oregon Convention Center Portland, Oregon, USA
Abstract View
Chemical Characteristics of PM in Coastal and Urban Environments
KWANGYUL LEE, Jiyeon Park, Min-Suk Bae, Kihong Park, Gwangju Institute of Science and Technology, Korea
Abstract Number: 234 Working Group: Remote and Regional Atmospheric Aerosols
Abstract The chemical characteristics of non-refractory submicrometer particles less than 1 micro-meter using AMS and less than 2.5 micro-meter using cyclone together with filter pack were investigated in coastal (Boseong, Korea) and urban (Gwangju, Korea) atmospheres. In addition, the black carbon (BC) concentration was measured at both sites. For further investigations, air mass backward trajectory analysis was also conducted to examine the effects of air mass types on the chemical characteristics of aerosols in coastal and urban environments. Diurnal patterns of chemical components (nitrate, BC, and organics) were more distinct at the urban site than at the coastal site. The enhanced sulfate and oxidized organics observed during the afternoon at both sites were likely caused by photochemical activity. Aerosol characteristics also varied with different air masses. The PM concentration increased when the air mass passed over heavy industrial areas before arriving at the site (polluted air mass), and these air masses moved slowly compared to other air masses. Additionally, sulfate-dominant and organic-dominant PM events were observed at both sites. These events were LTP events in which organics were highly aged during transport. More thorough analysis will be conducted, and their results will be presented