Comparison of Mobile and Fixed-Site Black Carbon Measurements for High-Resolution Urban Pollution Mapping

Environmental Science & Technology
Sarah E ChamblissJoshua S Apte

Abstract

Urban concentrations of black carbon (BC) and other primary pollutants vary on small spatial scales (<100m). Mobile air pollution measurements can provide information on fine-scale spatial variation, thereby informing exposure assessment and mitigation efforts. However, the temporal sparsity of these measurements presents a challenge for estimating representative long-term concentrations. We evaluate the capabilities of mobile monitoring in the represention of time-stable spatial patterns by comparing against a large set of continuous fixed-site measurements from a sampling campaign in West Oakland, California. Custom-built, low-cost aerosol black carbon detectors (ABCDs) provided 100 days of continuous measurements at 97 near-road and 3 background fixed sites during summer 2017; two concurrently operated mobile laboratories collected over 300 h of in-motion measurements using a photoacoustic extinctiometer. The spatial coverage from mobile monitoring reveals patterns missed by the fixed-site network. Time-integrated measurements from mobile lab visits to fixed-site monitors reveal modest correlation (spatial R2 = 0.51) with medians of full daytime fixed-site measurements. Aggregation of mobile monitoring data in space and time...Continue Reading

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Citations

Dec 10, 2020·The Science of the Total Environment·William L TaylorAndrew J Hoisington
Jun 2, 2021·International Journal of Epidemiology·Corinne A RiddellJoan A Casey
Sep 11, 2021·Environmental Science & Technology·Sofia D Hamilton, Robert A Harley
Sep 9, 2021·Proceedings of the National Academy of Sciences of the United States of America·Sarah E ChamblissJoshua S Apte
Oct 15, 2021·Environmental Science & Technology·Dana E GoinJoan A Casey

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