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KMID : 1024520160250070973
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Journal of the Environmental Sciences
2016 Volume.25 No. 7 p.973 ~ p.987
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A Study on Changes in CO2 Concentrations and their Impact on Radiative Forcing at Urban Center and Background Sites on Jeju Island in Recent Years
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Lee Soo-Jeong
Song Sang-Keun
Park Yeon-Hee
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Abstract
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The spatial and temporal variations of CO2 concentrations and radiative forcing (RF) due to CO2 were examined at urban
center (Yeon-dong) during 2010-2015 and background sites (Gosan) during 2010-2014 on Jeju Island. The RF at the two sites was estimated based on a simplified expression for calculating RF for the study period. Overall, annual mean CO2
concentrations at the Yeon-dong and Gosan sites have gradually increased, and the concentrations were higher at Yeon-dong(401-422 ppm) than at Gosan (398-404 ppm). The maximum CO2 concentrations at the two sites were observed in winter or spring, followed by fall and summer, with higher concentrations at Yeon-dong. The RF at Yeon-dong (annual mean of up to 0.70 W/m2 in 2015) was higher than that at Gosan (up to 0.46 W/m2 in 2014), possibly because of higher CO2 concentrations at Yeon-dong resulting from population growth and human activities (e.g., fossil fuel combustion). The highest monthly mean RFs at Yeon-dong (approximately 0.92 W/m2) and Gosan (0.52 W/m2) were observed in spring 2015 (Yeon-dong) and spring 2013 (Gosan), whereas the lowest RFs (0.17 and 0.31 W/m2, respectively) in fall 2011 (Yeon-dong) and summer in 2012 (Gosan).
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KEYWORD
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CO2, Radiative forcing, Human activity, Urban center site, Jeju
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