Trends in Chemical Composition of Global and Regional Population-Weighted Fine Particulate Matter Estimated for 25 Years
Citations Over TimeTop 10% of 2017 papers
Abstract
We interpret in situ and satellite observations with a chemical transport model (GEOS-Chem, downscaled to 0.1° × 0.1°) to understand global trends in population-weighted mean chemical composition of fine particulate matter (PM2.5). Trends in observed and simulated population-weighted mean PM2.5 composition over 1989-2013 are highly consistent for PM2.5 (-2.4 vs -2.4%/yr), secondary inorganic aerosols (-4.3 vs -4.1%/yr), organic aerosols (OA, -3.6 vs -3.0%/yr) and black carbon (-4.3 vs -3.9%/yr) over North America, as well as for sulfate (-4.7 vs -5.8%/yr) over Europe. Simulated trends over 1998-2013 also have overlapping 95% confidence intervals with satellite-derived trends in population-weighted mean PM2.5 for 20 of 21 global regions. Over 1989-2013, most (79%) of the simulated increase in global population-weighted mean PM2.5 of 0.28 μg m-3yr-1 is explained by significantly (p -3yr-1), nitrate (0.05 μg m-3yr-1), sulfate (0.04 μg m-3yr-1), and ammonium (0.03 μg m-3yr-1). These four components predominantly drive trends in population-weighted mean PM2.5 over populous regions of South Asia (0.94 μg m-3yr-1), East Asia (0.66 μg m-3yr-1), Western Europe (-0.47 μg m-3yr-1), and North America (-0.32 μg m-3yr-1). Trends in area-weighted mean and population-weighted mean PM2.5 composition differ significantly.
Related Papers
- → Differentiation of Particulate Matter Sources Based on the Chemical Composition of PM10 in Functional Urban Areas(2019)33 cited
- → Study on the contribution ratios of particulate matter emissions in differential provinces concerning condensable particulate matter(2019)18 cited
- → TOTAL PARTICULATE MATTER, PM10, PM2.5 EMISSIONS FROM PALM OIL MILL BOILER(2016)3 cited
- ANALYSIS OF FINE PARTICULATE MATTER NEAR URBAN ROADWAYS(1993)
- A Study of the Characteristics of Primary Particulate Matter after the Combustion of Pulverized Coal of Different Particulate Diameters(2005)