Articles | Volume 19, issue 12
Atmos. Chem. Phys., 19, 7973–8001, 2019
https://doi.org/10.5194/acp-19-7973-2019

Special issue: Observations and Modeling of the Green Ocean Amazon (GoAmazon2014/5)...

Atmos. Chem. Phys., 19, 7973–8001, 2019
https://doi.org/10.5194/acp-19-7973-2019

Research article 18 Jun 2019

Research article | 18 Jun 2019

Contributions of biomass-burning, urban, and biogenic emissions to the concentrations and light-absorbing properties of particulate matter in central Amazonia during the dry season

Suzane S. de Sá et al.

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Short summary
This study investigates the impacts of urban and fire emissions on the concentration, composition, and optical properties of submicron particulate matter (PM1) in central Amazonia during the dry season. Biomass-burning and urban emissions appeared to contribute at least 80 % of brown carbon absorption while accounting for 30 % to 40 % of the organic PM1 mass concentration. Only a fraction of the 9-fold increase in mass concentration relative to the wet season was due to biomass burning.
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