|
KMID : 1024520190280020169
|
|
Journal of the Environmental Sciences
2019 Volume.28 No. 2 p.169 ~ p.182
|
|
|
Spatial-temporal variations in surface ozone concentrations in Busan metropolitan area
|
|
Kang Yoon-Hee
Kim Yoo-Keun
Hwang Mi-Kyoung
Jeong Ju-Hee
Kim Hyun-Su
Kang Min-Seong
|
|
|
Abstract
|
|
|
|
Temporal and spatial variations in surface ozone concentrations in Busan were investigated by using observation data from urban air quality sites during 2001-2016. The annual ozone concentrations showed a significant increasing trend of +0.40 ppb yr-1 in this period, with a more rapid increase of +0.81 ppb yr-1 since 2010. For the monthly analysis, the increase in ozone concentration was the greatest in August (+0.68 ppb yr-1). These ozone trends were due mainly to rising temperature (+0.05℃ yr-1) and weak decreasing precipitation (－6.42 mm yr-1). However, the extreme weather events (heat wave, localized heavy rain, etc.) lead to an increase in short-term variability of ozone since 2010. The relatively low ozone concentrations in the downtown area were caused by high NOx emissions from mobile sources. The increases in ozone concentrations were observed at most of the air quality monitoring sites due to the reductions in anthropogenic emissions of NOx during 2001-2015. However, in the southern coastal area, lower rates of increase in ozone concentrations were observed by ?0.10~0.25 ppb yr-1 due to the significant NOx emitted by ships in the Busan port and Busan new port.
|
|
|
KEYWORD
|
|
|
Surface ozone, Temperature, Precipitation, Anthropogenic emission, NOx
|
|
|
FullTexts / Linksout information
|
|
|
|
|
Listed journal information
|
|
|