Characterization and sources of black carbon in PM(2.5) at a site close to a roadway in Gwangju, Korea, during winter

Environmental Science. Processes & Impacts
Seung Shik Park, Kwon-Ho Lee

Abstract

Continuous measurements of black carbon (BC) concentrations in PM2.5 were conducted using a single-wavelength aethalometer (@880 nm, Magee Sci., AE16) at a site close to a roadway (∼70 m from roadside) in Gwangju, Korea, during winter (December-February) to investigate the characteristics and sources of BC particles. The BC concentrations ranked in the order of January > December > February, probably due to lower boundary layer height, ambient temperature, and wind speed during January. Diurnal patterns in BC and carbon monoxide (CO) levels exhibited peak concentrations during the morning and evening hours coinciding with rush-hour traffic, with a strong correlation (R(2)) ranging from 0.52 (December) to 0.87 (January). It was found that wind speed was an important factor controlling BC concentrations at the site. Very high BC concentrations, up to ∼18.0 μg m(-3), were observed at wind speeds < 1.5 m s(-1). The BC concentrations acquired under weak wind conditions are highly correlated with CO with ΔBC/ΔCO (the slope of BC and CO correlation) of 0.0063 (R(2) = 0.55, p < 0.01) and 0.0065 (R(2) = 0.59, p < 0.01) μg m(-3) ppbv(-1) during day and night, respectively, suggesting no significant difference in the fraction of diesel ve...Continue Reading

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Jan 21, 2015·Environmental Science. Processes & Impacts·Se-Chang Son, Seung Shik Park

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Citations

Mar 20, 2016·Plant Science : an International Journal of Experimental Plant Biology·Moges RettaBart M Nicolaï
Aug 11, 2015·Plant Science : an International Journal of Experimental Plant Biology·Herman N C BerghuijsPaul C Struik
Nov 28, 2015·Environmental Research·Laura A McGuinnRobert B Devlin
Nov 9, 2017·International Journal of Environmental Research and Public Health·Sungroul KimDongmin Yun

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