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Air-quality implications of widespread adoption of cool roofs on ozone and particulate matter in southern California.
Epstein, Scott A; Lee, Sang-Mi; Katzenstein, Aaron S; Carreras-Sospedra, Marc; Zhang, Xinqiu; Farina, Salvatore C; Vahmani, Pouya; Fine, Philip M; Ban-Weiss, George.
Afiliación
  • Epstein SA; Planning, Rules, and Area Sources Division, South Coast Air Quality Management District, Diamond Bar, CA 91765; sepstein@aqmd.gov.
  • Lee SM; Planning, Rules, and Area Sources Division, South Coast Air Quality Management District, Diamond Bar, CA 91765.
  • Katzenstein AS; Planning, Rules, and Area Sources Division, South Coast Air Quality Management District, Diamond Bar, CA 91765.
  • Carreras-Sospedra M; Planning, Rules, and Area Sources Division, South Coast Air Quality Management District, Diamond Bar, CA 91765.
  • Zhang X; Planning, Rules, and Area Sources Division, South Coast Air Quality Management District, Diamond Bar, CA 91765.
  • Farina SC; Planning, Rules, and Area Sources Division, South Coast Air Quality Management District, Diamond Bar, CA 91765.
  • Vahmani P; Sonny Astani Department of Civil and Environmental Engineering, University of Southern California, Los Angeles, CA 90089.
  • Fine PM; Planning, Rules, and Area Sources Division, South Coast Air Quality Management District, Diamond Bar, CA 91765.
  • Ban-Weiss G; Sonny Astani Department of Civil and Environmental Engineering, University of Southern California, Los Angeles, CA 90089.
Proc Natl Acad Sci U S A ; 114(34): 8991-8996, 2017 08 22.
Article en En | MEDLINE | ID: mdl-28784778
The installation of roofing materials with increased solar reflectance (i.e., "cool roofs") can mitigate the urban heat island effect and reduce energy use. In addition, meteorological changes, along with the possibility of enhanced UV reflection from these surfaces, can have complex impacts on ozone and PM2.5 concentrations. We aim to evaluate the air-quality impacts of widespread cool-roof installations prescribed by California's Title 24 building energy efficiency standards within the heavily populated and polluted South Coast Air Basin (SoCAB). Development of a comprehensive rooftop area database and evaluation of spectral reflectance measurements of roofing materials allows us to project potential future changes in solar and UV reflectance for simulations using the Weather Research Forecast and Community Multiscale Air Quality (CMAQ) models. 2012 meteorological simulations indicate a decrease in daily maximum temperatures, daily maximum boundary layer heights, and ventilation coefficients throughout the SoCAB upon widespread installation of cool roofs. CMAQ simulations show significant increases in PM2.5 concentrations and policy-relevant design values. Changes in 8-h ozone concentrations depend on the potential change in UV reflectance, ranging from a decrease in population-weighted concentrations when UV reflectance remains unchanged to an increase when changes in UV reflectance are at an upper bound. However, 8-h policy-relevant ozone design values increase in all cases. Although the other benefits of cool roofs could outweigh small air-quality penalties, UV reflectance standards for cool roofing materials could mitigate these negative consequences. Results of this study motivate the careful consideration of future rooftop and pavement solar reflectance modification policies.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Proc Natl Acad Sci U S A Año: 2017 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Proc Natl Acad Sci U S A Año: 2017 Tipo del documento: Article Pais de publicación: Estados Unidos