Factors Influencing Mobile Source Particulate Matter Emissions-to-Exposure Relationships in the Boston Urban Area

摘要: Benefit-cost and regulatory impact analyses often use atmospheric dispersion models with coarse resolution to estimate the benefits of proposed mobile source emission control regulations. This approach may bias health estimates or miss important intra-urban variability for primary air pollutants. In this study, we fine particulate matter (PM2.5) intake fractions (iF; fraction a pollutant emitted from that is inhaled by population) each 23 398 road segments in Boston Metro Core area evaluate potential emissions-to-exposure relationship. We iFs using CAL3QHCR line model combined residential populations within 5000 m segment. The annual average values range 0.8 53 per million, mean 12 million. On average, 46% total exposure realized 200 segment, though varies 0 93% largely due variable population patterns. Our findings indicate likelihood substantial PM2.5 iF accounting movement time, localized meteorological conditions, street-canyon configurations would likely increase.