Spatial and diurnal variations in concentration of atmospheric NO_x along urban-rural roadways in Nanjing, Southeastern China
by Yunlong Yin, Taolin Zhang, Yongming Luo, Donghui Lu
International Journal of Environment and Pollution (IJEP), Vol. 32, No. 3, 2008

Abstract: Atmospheric NO_x concentrations (including NO₂ and NO) on the roadside environments of urban trunk, belt highway and suburban road as well as a reference in a forest area were measured. NO_x concentrations on roadside environments tended to be higher than that on the reference. With the exception of suburban road, NO_x concentrations over both of the urban trunk and belt highway exceeded the limited value of National Air Environmental Quality Standards. Gradient measurement of NO_x on the downwind side of the belt highway shows that it declined to background level over 100 m from the road edge.

Online publication date: Wed, 23-Apr-2008

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