Articles | Volume 25, issue 2
https://doi.org/10.5194/acp-25-959-2025
https://doi.org/10.5194/acp-25-959-2025
Research article
 | 
27 Jan 2025
Research article |  | 27 Jan 2025

Seasonal investigation of ultrafine-particle organic composition in an eastern Amazonian rainforest

Adam E. Thomas, Hayley S. Glicker, Alex B. Guenther, Roger Seco, Oscar Vega Bustillos, Julio Tota, Rodrigo A. F. Souza, and James N. Smith

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Cited articles

Allan, J. D., Morgan, W. T., Darbyshire, E., Flynn, M. J., Williams, P. I., Oram, D. E., Artaxo, P., Brito, J., Lee, J. D., and Coe, H.: Airborne observations of IEPOX-derived isoprene SOA in the Amazon during SAMBBA, Atmos. Chem. Phys., 14, 11393–11407, https://doi.org/10.5194/acp-14-11393-2014, 2014. a
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Alves, E. G., Taylor, T., Robin, M., Oliveira, D. P., Schietti, J., Júnior, S. D., Zannoni, N., Williams, J., Hartmann, C., Gonçalves, J. F. C., Schöngart, J., Wittmann, F., and Piedade, M. T. F.: Seasonal shifts in isoprenoid emission composition from three hyperdominant tree species in central Amazonia, Plant Biol., 24, 721–733, https://doi.org/10.1111/plb.13419, 2022. a
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Short summary
We present measurements of the organic composition of ultrafine particles collected from the eastern Amazon, an understudied region that is subjected to increasing human influence. We find that while isoprene chemistry is likely significant for ultrafine-particle growth throughout the year, compounds related to other sources, such as biological-spore emissions and biomass burning, exhibit striking seasonal differences, implying extensive variation in regional ultrafine-particle sources.
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