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Assessing the Suitability of Multiple Dispersion and Land Use Regression Models for Urban Traffic-Related Ultrafine Particles
  • Published Date:
    Dec 14 2016
  • Source:
    Environ Sci Technol. 51(1):384-392.


Public Access Version Available on: January 03, 2018 information icon
Please check back on the date listed above.
Details:
  • Pubmed ID:
    27966909
  • Pubmed Central ID:
    PMC5209293
  • Description:
    Comparative evaluations are needed to assess the suitability of near-road air pollution models for traffic-related ultrafine particle number concentration (PNC). Our goal was to evaluate the ability of dispersion (CALINE4, AERMOD, R-LINE, and QUIC) and regression models to predict PNC in a residential neighborhood (Somerville) and an urban center (Chinatown) near highways in and near Boston, Massachusetts. PNC was measured in each area, and models were compared to each other and measurements for hot (>18 °C) and cold (<10 °C) hours with wind directions parallel to and perpendicular downwind from highways. In Somerville, correlation and error statistics were typically acceptable, and all models predicted concentration gradients extending ∼100 m from the highway. In contrast, in Chinatown, PNC trends differed among models, and predictions were poorly correlated with measurements likely due to effects of street canyons and nonhighway particle sources. Our results demonstrate the importance of selecting PNC models that align with study area characteristics (e.g., dominant sources and building geometry). We applied widely available models to typical urban study areas; therefore, our results should be generalizable to models of hourly averaged PNC in similar urban areas.

  • Document Type:
  • Collection(s):
  • Funding:
    T42 OH008455/OH/NIOSH CDC HHS/United States
    T32 ES019854/ES/NIEHS NIH HHS/United States
    P30 ES005022/ES/NIEHS NIH HHS/United States
    P30 ES017885/ES/NIEHS NIH HHS/United States
    R01 ES015462/ES/NIEHS NIH HHS/United States
  • Supporting Files:
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