期刊
ATMOSPHERIC POLLUTION RESEARCH
卷 9, 期 4, 页码 714-722出版社
TURKISH NATL COMMITTEE AIR POLLUTION RES & CONTROL-TUNCAP
DOI: 10.1016/j.apr.2018.01.008
关键词
Urban; Aerosol particles; Vehicles; Roadway; UFP; Nanoparticles
资金
- National Science Foundation [1517365]
- NSF-IGERT award
High-traffic roadways substantially contribute to UFP number concentrations and size distributions within many urban areas and may contribute to excess urban mortality and morbidity. A number of previous studies have quantified near-road concentrations of UFP and the decay with horizontal displacement from highways and indicated rapid decreases to near background levels within 300m of the line-source. However, the majority of those previous studies have focused on ground-level highways and so herein we present data from sampling perpendicular to an elevated highway viaduct. Measurements taken during morning rush hour and non-rush hour periods using a bicycle-mounted TSI Nanoscan scanning mobility particle sizer within distances of 200-300m from the freeway are lower than those from previous studies of ground-level highways, but the decay of UFP number concentrations with distance from the highway is more gradual. A linear mixed-effects model indicates only distance from I-81 and air temperature are significant predictors of near I-81 UFP concentrations, but wind speed and direction and vehicle counts on the street where the measurements were conducted exhibit the expected sign of dependence.
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