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Article
Spatiotemporal Distributions of Ambient Oxides of Nitrogen, with Implications for Exposure Inequality and Urban Design
Journal of the Air & Waste Management Association
  • Haofei Yu, University of South Florida
  • Amy L. Stuart, University of South Florida
Document Type
Article
Publication Date
1-1-2013
Digital Object Identifier (DOI)
https://doi.org/10.1080/10962247.2013.800168
Abstract

Intra-urban differences in concentrations of oxides of nitrogen (NOx) and exposure disparities in the Tampa area were investigated across temporal scales through emissions estimation, dispersion modeling, and analysis of residential subpopulation exposures. A hybrid estimation method was applied to provide link-level hourly on-road mobile source emissions. Ambient concentrations in 2002 at 1 km resolution were estimated using the CALPUFF dispersion model. Results were combined with residential demographic data at the block-group level, to investigate exposures and inequality for select racioethnic, age, and income population subgroups. Results indicate that on-road mobile sources contributed disproportionately to ground-level concentrations and dominated the spatial footprint across temporal scales (annual average to maximum hour). The black, lower income (less than $40K annually), and Hispanic subgroups had higher estimated exposures than the county average; the white and higher income (greater than $60K) subgroups had lower than average exposures. As annual average concentration increased, the disparity between groups generally increased. However, for the highest 1-hr concentrations, reverse disparities were also found.

Citation / Publisher Attribution

Journal of the Air & Waste Management Association, v. 63, issue 8, p. 943-955

Citation Information
Haofei Yu and Amy L. Stuart. "Spatiotemporal Distributions of Ambient Oxides of Nitrogen, with Implications for Exposure Inequality and Urban Design" Journal of the Air & Waste Management Association Vol. 63 Iss. 8 (2013) p. 943 - 955
Available at: http://works.bepress.com/amy-stuart/36/