Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Ambient peroxyacyl nitrate concentration and regional transportation in Beijing
AbstractPeroxyacyl nitrates (PANs) are photochemical secondary pollutants that play a key role in the atmospheric chemistry of the troposphere. However, there have been few studies on the long-term variation and inter-regional transport of PANs. In this study, summertime ambient PAN concentrations were monitored at urban and rural sites in Beijing and Hebei, China, between 2006 and 2014. In Beijing, the peak concentrations of PAN and PPN were in the range of 6–17 ppbv and 0.6–2.2 ppbv, respectively, higher than concentrations in other provinces. The nitrogen oxide (NOx) concentration decreased at a rate of 1.7 ppbv/yr (∼4% yr−1), and the PAN concentration decreased at a rate of 0.03 ppbv/yr (∼3% yr−1), while the ozone (O3) concentration increased at a rate of 1.5 ppbv/yr (∼4% yr−1). Trajectory clustering analyses showed that high concentrations of PAN were mainly affected by low air masses transported medium/short distances from South Beijing, and the potential source contribution function maps showed that the likely pollution source area was concentrated in the southern region of Beijing. These findings provide a theoretical basis for pollution control in this region.
HighlightsAnnual variation in PAN concentrations of Beijing was monitored from 2006 to 2014.Main potential sources of high concentrations of PAN in Beijing was located.Regional transport of PAN between Beijing and Hebei Province was analyzed.
Ambient peroxyacyl nitrate concentration and regional transportation in Beijing
AbstractPeroxyacyl nitrates (PANs) are photochemical secondary pollutants that play a key role in the atmospheric chemistry of the troposphere. However, there have been few studies on the long-term variation and inter-regional transport of PANs. In this study, summertime ambient PAN concentrations were monitored at urban and rural sites in Beijing and Hebei, China, between 2006 and 2014. In Beijing, the peak concentrations of PAN and PPN were in the range of 6–17 ppbv and 0.6–2.2 ppbv, respectively, higher than concentrations in other provinces. The nitrogen oxide (NOx) concentration decreased at a rate of 1.7 ppbv/yr (∼4% yr−1), and the PAN concentration decreased at a rate of 0.03 ppbv/yr (∼3% yr−1), while the ozone (O3) concentration increased at a rate of 1.5 ppbv/yr (∼4% yr−1). Trajectory clustering analyses showed that high concentrations of PAN were mainly affected by low air masses transported medium/short distances from South Beijing, and the potential source contribution function maps showed that the likely pollution source area was concentrated in the southern region of Beijing. These findings provide a theoretical basis for pollution control in this region.
HighlightsAnnual variation in PAN concentrations of Beijing was monitored from 2006 to 2014.Main potential sources of high concentrations of PAN in Beijing was located.Regional transport of PAN between Beijing and Hebei Province was analyzed.
Ambient peroxyacyl nitrate concentration and regional transportation in Beijing
Zhang, Boya (Autor:in) / Zhao, Bu (Autor:in) / Zuo, Peng (Autor:in) / Huang, Zhi (Autor:in) / Zhang, Jianbo (Autor:in)
Atmospheric Environment ; 166 ; 543-550
29.07.2017
8 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
PAN , Concentration , CPF , PSCF , Regional transport
Development of Beijing Regional Intelligent Transportation System Architecture
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