Relationship between rooftop and on-road concentrations of traffic-related pollutants in a busy street canyon: Ambient wind effects

被引：31
作者：
Kwak, Kyung-Hwan [1 ,2 ]
Lee, Sang-Hyun [3 ]
Seo, Jaemyeong Mango [1 ]
Park, Seung-Bu [1 ,4 ]
Baik, Jong-Jin [1 ]
机构：
[1] Seoul Natl Univ, Sch Earth & Environm Sci, Seoul 151742, South Korea
[2] Korea Inst Sci & Technol, Ctr Environm Hlth & Welf Res, Seoul 136791, South Korea
[3] Kongju Natl Univ, Dept Atmospher Sci, Gongju 314701, Chungcheongnam, South Korea
[4] Columbia Univ, Dept Earth & Environm Engn, New York, NY 10027 USA
来源：
ENVIRONMENTAL POLLUTION | 2016年 / 208卷
基金：
新加坡国家研究基金会;
关键词：
Traffic-related pollutants; Busy street canyon; Ambient wind direction; Rooftop measurement; On-road measurement; AIR-POLLUTION; LONG-TERM; SPATIAL VARIABILITY; REACTIVE POLLUTANTS; NITROGEN-OXIDES; URBAN ROADSIDE; CENTRAL LONDON; DISPERSION; NO2; PARTICLES;
D O I：
10.1016/j.envpol.2015.07.030
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Rooftop and on-road measurements of O-3, 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 similar to 0.3 in Seoul, Republic of Korea, from 15 April to 1 May 2014. The median road-to-roof 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. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：185 / 197
页数：13
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