Dataset Information

Global chemical composition of ambient fine particulate matter for exposure assessment.

ABSTRACT: Epidemiologic and health impact studies are inhibited by the paucity of global, long-term measurements of the chemical composition of fine particulate matter. We inferred PM2.5 chemical composition at 0.1° × 0.1° spatial resolution for 2004-2008 by combining aerosol optical depth retrieved from the MODIS and MISR satellite instruments, with coincident profile and composition information from the GEOS-Chem global chemical transport model. Evaluation of the satellite-model PM2.5 composition data set with North American in situ measurements indicated significant spatial agreement for secondary inorganic aerosol, particulate organic mass, black carbon, mineral dust, and sea salt. We found that global population-weighted PM2.5 concentrations were dominated by particulate organic mass (11.9 ± 7.3 ?g/m(3)), secondary inorganic aerosol (11.1 ± 5.0 ?g/m(3)), and mineral dust (11.1 ± 7.9 ?g/m(3)). Secondary inorganic PM2.5 concentrations exceeded 30 ?g/m(3) over East China. Sensitivity simulations suggested that population-weighted ambient PM2.5 from biofuel burning (11 ?g/m(3)) could be almost as large as from fossil fuel combustion sources (17 ?g/m(3)). These estimates offer information about global population exposure to the chemical components and sources of PM2.5.

SUBMITTER: Philip S

PROVIDER: S-EPMC4238642 | biostudies-literature | 2014 Nov

REPOSITORIES: biostudies-literature

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Global chemical composition of ambient fine particulate matter for exposure assessment.

Philip Sajeev S Martin Randall V RV van Donkelaar Aaron A Lo Jason Wai-Ho JW Wang Yuxuan Y Chen Dan D Zhang Lin L Kasibhatla Prasad S PS Wang Siwen S Zhang Qiang Q Lu Zifeng Z Streets David G DG Bittman Shabtai S Macdonald Douglas J DJ

Environmental science & technology 20141106 22

Epidemiologic and health impact studies are inhibited by the paucity of global, long-term measurements of the chemical composition of fine particulate matter. We inferred PM2.5 chemical composition at 0.1° × 0.1° spatial resolution for 2004-2008 by combining aerosol optical depth retrieved from the MODIS and MISR satellite instruments, with coincident profile and composition information from the GEOS-Chem global chemical transport model. Evaluation of the satellite-model PM2.5 composition data s ...[more]

PMID: 25343705

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Global chemical composition of ambient fine particulate matter for exposure assessment.

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Global chemical composition of ambient fine particulate matter for exposure assessment.

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