Comparison of impacts of aircraft emissions within the boundary layer on the regional ozone in South Korea

摘要

In this study, the air pollutants emitted from aircraft within the boundary layer (BL) were investigated for their impacts on the ozone (O-3) concentration at and around three international airports (Incheon, RKSI; Gimpo, RKSS; and Jeju, RKPC) using the WRF-CMAQ modeling system during the summer of 2010. The analysis was performed using two sets of simulation scenarios: (1) with (i.e., TOTAL case) and (2) without aircraft emissions (i.e., BASE case). The model study suggested that aircraft emissions within the BL over the three airports can have a significant impact on the O-3 (and NOx) concentrations in the source regions (the airports) and their surrounding/downwind areas. A significant negative impact of aircraft emissions on the O-3 concentrations in the late afternoon (19:00 LST) was predicted near the three airports with their largest impact of -20 ppb near the RKSI at 19:00 LST. This was attributed mainly to the high NOx conditions in the VOC-limited areas and possibly in part to the rapid titration of O-3 by NO around these airports. The rate of photochemical O-3 destruction due to the aircraft emissions near the three airports was the most dominant contributor to the O-3 levels compared to the other physical processes. (C) 2015 Elsevier Ltd. All rights reserved.