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- W2919638922 abstract "Background: Intensive mobile monitoring data are needed for development of models for exposure assessment of ultrafine particles (UFP) and other traffic-related air pollutants in near-highway urban neighborhoods. Aims: The aims of this work were (1) to collect a data set that captured spatial-temporal variation of UFP in several neighborhoods near Interstate 93 (I-93; ~150,000 vehicles per day) and (2) to use this data to understand effects of differential urbanization on UFP. Methods: As part of the Community Assessment of Freeway Exposure and Health (CAFEH) study, we monitored for one year in each of three Boston-area neighborhoods near I-93 (a city center neighborhood with tall buildings and street canyons and two mixed residential/commercial neighborhoods), each paired with a residential neighborhood >1 km from I-93. Data was collected using a mobile platform equipped with rapid-response instruments on >30 days (2-6 hours day-1) in each neighborhood and included morning and afternoon sessions on weekdays and weekends in all four seasons to capture a wide range of traffic and meteorological conditions. Measurements were made of particle number concentration (PNC; 4-3,000 nm, a proxy for UFP) and other pollutants. Results: The neighborhoods had similar PNC levels <100 m from I-93; however, the degree of PNC attenuation varied inversely with urbanization. PNC 200-400 m from I-93 was lower than PNC <200 m from the highway by 5% in residential neighborhoods and 2% in the city center. Smaller decreases in PNC in the city center were likely due to street canyons and heavy local traffic. There was also less temporal variation in neighborhoods that were dominated by major roads. Within each neighborhood, temporal and spatial variation were approximately equal in magnitude. Conclusions: Mobile monitoring measures spatial variation and provides improved understanding of how city infrastructure affects PNC levels to inform the development of UFP models for exposure assessment." @default.
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- W2919638922 date "2013-09-19" @default.
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- W2919638922 title "Mobile monitoring of traffic-related ultrafine particles in near-highway neighborhoods in Boston, Massachusetts (USA)" @default.
- W2919638922 doi "https://doi.org/10.1289/isee.2013.p-1-01-26" @default.
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