Cited by Optical and particulate properties of dust aerosols in El Paso, Texas

Chemical feedbacks weaken the wintertime response of particulate sulfate and nitrate to emissions reductions over the eastern United States DOI

Viral Shah, Lyatt Jaeglé, Joel A. Thornton

et al.

Proceedings of the National Academy of Sciences, Journal Year: 2018, Volume and Issue: 115(32), P. 8110 - 8115

Published: July 23, 2018

Significance Exposure to fine particulate matter is a leading cause of premature deaths and illnesses globally. In the eastern United States, substantial cuts in sulfur dioxide nitrogen oxides emissions have considerably lowered sulfate nitrate concentrations for all seasons except winter. Simulations that reproduce detailed airborne observations wintertime atmospheric chemistry over States indicate formation limited by availability oxidants acidity particles, respectively. These limitations relax at lower ambient concentrations, forming more efficiently, weaken effect emission reductions. results imply larger reductions, especially during winter, are necessary improvements air quality States.

Language: Английский

Citations

203

Composition and sources of fine particulate matter across urban and rural sites in the Midwestern United States DOI

Shuvashish Kundu, Elizabeth A. Stone

Environmental Science Processes & Impacts, Journal Year: 2014, Volume and Issue: 16(6), P. 1360 - 1370

Published: Jan. 1, 2014

The composition and sources of fine particulate matter (PM2.5) were investigated in rural urban locations Iowa, located the agricultural industrial Midwestern United States, from April 2009 to December 2012. Major chemical contributors PM2.5 mass sulfate, nitrate, ammonium, organic carbon. Non-parametric statistical analyses demonstrated that two sites had significantly enhanced levels crustal materials (Si, Al) driven by activities unpaved roads. Meanwhile, three areas secondary aerosols (nitrate, ammonium) combustion products (elemental carbon). Davenport site higher trace metals (Fe, Pb, Zn), demonstrating important local impact point on air quality. Sources evaluated using multi-variant positive matrix factorization (PMF) source apportionment model. For each individual site, seven nine factors identified: sulfate (accounting for 29-30% PM2.5), nitrate (17-24%), biomass burning (9-21%), gasoline (6-16%), diesel (3-9%), dust (6-11%), industry (0.4-5%) winter salt (2-6%). Source contributions a clear enhancement engines (by factor 1.14) 2.3), which is significant due well-documented negative health impacts vehicular emissions. This study presents first results state Iowa broadly applicable understanding differences anthropogenic natural urban-rural continuum particle pollution.

Language: Английский

Citations

117

Long-term source apportionment of PM2.5 across the contiguous United States (2000-2019) using a multilinear engine model DOI