TY - JOUR
T1 - Relationship between rooftop and on-road concentrations of trafficrelated pollutants in a busy street canyon
T2 - Ambient wind effects
AU - Kwak, Kyung Hwan
AU - Lee, Sang Hyun
AU - Mango Seo, Jaemyeong
AU - Park, Seung Bu
AU - Baik, Jong Jin
N1 - Publisher Copyright:
© 2015 Elsevier Ltd. All rights reserved.
PY - 2016/1/1
Y1 - 2016/1/1
N2 - Rooftop and on-road measurements of O3, NO2, NOx, and CO concentrations were conducted to investigate the relationship between rooftop and on-road concentrations in a busy and shallow street canyon with an aspect ratio of ∼0.3 in Seoul, Republic of Korea, from 15 April to 1 May 2014. The median road-toroof concentration ratios, correlation coefficients between rooftop and on-road concentrations, and temporal variations of rooftop and on-road concentrations are analyzed according to the rooftop wind directions which are two cross-canyon and two along-canyon directions. The analysis results indicate that the relationship is strong when the rooftop is situated on the downwind side rather than on the upwind side. Relative to the cross-canyon wind directions, one of the along-canyon wind directions can more enhance the relationship. A conceptual framework is proposed to explain the effect of ambient wind direction on the relationship between rooftop and on-road concentrations in a street canyon.
AB - Rooftop and on-road measurements of O3, NO2, NOx, and CO concentrations were conducted to investigate the relationship between rooftop and on-road concentrations in a busy and shallow street canyon with an aspect ratio of ∼0.3 in Seoul, Republic of Korea, from 15 April to 1 May 2014. The median road-toroof concentration ratios, correlation coefficients between rooftop and on-road concentrations, and temporal variations of rooftop and on-road concentrations are analyzed according to the rooftop wind directions which are two cross-canyon and two along-canyon directions. The analysis results indicate that the relationship is strong when the rooftop is situated on the downwind side rather than on the upwind side. Relative to the cross-canyon wind directions, one of the along-canyon wind directions can more enhance the relationship. A conceptual framework is proposed to explain the effect of ambient wind direction on the relationship between rooftop and on-road concentrations in a street canyon.
KW - Ambient wind direction
KW - Busy street canyon
KW - On-road measurement
KW - Rooftop measurement
KW - Traffic-related pollutants
UR - http://www.scopus.com/inward/record.url?scp=84958931075&partnerID=8YFLogxK
U2 - 10.1016/j.envpol.2015.07.030
DO - 10.1016/j.envpol.2015.07.030
M3 - Article
C2 - 26235661
AN - SCOPUS:84958931075
SN - 0269-7491
VL - 208
SP - 185
EP - 197
JO - Environmental Pollution
JF - Environmental Pollution
ER -