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Cited by 715

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Regional Estimates of Chemical Composition of Fine Particulate Matter Using a Combined Geoscience-Statistical Method with Information from Satellites, Models, and Monitors

Open access
van Donkelaar, Aaron, Martin, Randall V., Li, Chi, Burnett, Richard T.·2019·Environmental Science & Technology

Abstract

Abstract An accurate fine-resolution surface of the chemical composition of fine particulate matter (PM2.5) would offer valuable information for epidemiological studies and health impact assessments. We develop geoscience-derived estimates of PM2.5 composition from a chemical transport model (GEOS-Chem) and satellite observations of aerosol optical depth, and statistically fuse these estimates with ground-based observations using a geographically weighted regression over North America to produce a spatially complete representation of sulfate, nitrate, ammonium, black carbon, organic matter, mineral dust, and sea-salt over 2000–2016. Significant long-term agreement is found with cross-validation sites over North America (R2 = 0.57─0.96), with the strongest agreement for sulfate (R2 = 0.96), nitrate (R2 = 0.90), and ammonium (R2 = 0.86). We find that North American decreases in population-weighted fine particulate matter (PM2.5) concentrations since 2000 have been most heavily influenced by regional changes in sulfate and organic matter. Regionally, the relative importance of several chemical components are found to change with PM2.5 concentration, such as higher PM2.5 concentrations having a larger proportion of nitrate and a smaller proportion of sulfate. This data set offers information for research into the health effects of PM2.5 chemical components.

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Metadata

Authors
van Donkelaar, A., Martin, R. V., Li, C., & Burnett, R. T.
Venue
Environmental Science & Technology
Published
2019-01-30
Volume
53
Issue
5
Pages
2595-2611
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W2912034185
Cited by
715
References
2
FWCI
34.68
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Regional Estimates of Chemical Composition of Fine Particulate Matter Using a Combined Geoscience-Statistical Method with Information from Satellites, Models, and Monitors. https://app.cochat.ai/papers/10.1021/acs.est.8b06392
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van Donkelaar, A., Martin, R. V., Li, C., & Burnett, R. T. (2019). Regional Estimates of Chemical Composition of Fine Particulate Matter Using a Combined Geoscience-Statistical Method with Information from Satellites, Models, and Monitors. Environmental Science & Technology. https://doi.org/10.1021/acs.est.8b06392

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