Aging Effects on Biomass Burning Aerosol Mass and Composition: A Critical Review of Field and Laboratory Studies

Environmental Science & Technology
Anna L HodshireJeffrey R Pierce

Abstract

Biomass burning is a major source of atmospheric particulate matter (PM) with impacts on health, climate, and air quality. The particles and vapors within biomass burning plumes undergo chemical and physical aging as they are transported downwind. Field measurements of the evolution of PM with plume age range from net decreases to net increases, with most showing little to no change. In contrast, laboratory studies tend to show significant mass increases on average. On the other hand, similar effects of aging on the average PM composition (e.g., oxygen-to-carbon ratio) are reported for lab and field studies. Currently, there is no consensus on the mechanisms that lead to these observed similarities and differences. This review summarizes available observations of aging-related biomass burning aerosol mass concentrations and composition markers, and discusses four broad hypotheses to explain variability within and between field and laboratory campaigns: (1) variability in emissions and chemistry, (2) differences in dilution/entrainment, (3) losses in chambers and lines, and (4) differences in the timing of the initial measurement, the baseline from which changes are estimated. We conclude with a concise set of research needs for...Continue Reading

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Citations

Apr 3, 2020·Journal of the Air & Waste Management Association·Daniel A JaffeAna G Rappold
Jul 17, 2020·Environmental Science. Processes & Impacts·Wei ZhouYele Sun
Aug 26, 2020·Proceedings of the National Academy of Sciences of the United States of America·Leif G JahnRyan C Sullivan
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Jun 26, 2020·The Science of the Total Environment·Jianjun LiLi Li
Jul 20, 2021·Work : a Journal of Prevention, Assessment, and Rehabilitation·Sheng Zeng, Lin Li
Jun 20, 2020·Environmental Science & Technology·Ali AkheratiShantanu H Jathar

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