Articles | Volume 25, issue 21
https://doi.org/10.5194/acp-25-14923-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-14923-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
06 Nov 2025
Research article |
| 06 Nov 2025
| 06 Nov 2025
Distinct aerosol populations and their vertical gradients in central Amazonia revealed by optical properties and cluster analysis
Rafael Valiati
CORRESPONDING AUTHOR
Department of Applied Physics, Institute of Physics, University of São Paulo, São Paulo 05508-900, Brazil
Bruno B. Meller
Department of Applied Physics, Institute of Physics, University of São Paulo, São Paulo 05508-900, Brazil
Marco A. Franco
Department of Atmospheric Sciences, Institute of Astronomy, Geophysics and Atmospheric Sciences, University of São Paulo, São Paulo 05508-900, Brazil
Multiphase Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany
Luciana V. Rizzo
Department of Applied Physics, Institute of Physics, University of São Paulo, São Paulo 05508-900, Brazil
Luiz A. T. Machado
Department of Applied Physics, Institute of Physics, University of São Paulo, São Paulo 05508-900, Brazil
Multiphase Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany
Sebastian Brill
Multiphase Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany
Bruna A. Holanda
Multiphase Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany
now at: Hessian Agency for Nature Conservation, Environment and Geology, 65203 Wiesbaden, Germany
Leslie A. Kremper
Multiphase Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany
Subha S. Raj
Multiphase Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany
Samara Carbone
Institute of Agrarian Sciences, Federal University of Uberlândia, Uberlândia-MG, 38408-100, Brazil
Cléo Q. Dias-Júnior
National Institute of Amazonian Research (INPA-CLIAMB), Manaus, AM, 69060-001, Brazil
Department of Physics, Federal Institute of Pará (IFPA), Belém, PA, 66093-020, Brazil
Fernando G. Morais
Department of Applied Physics, Institute of Physics, University of São Paulo, São Paulo 05508-900, Brazil
now at: Environmental Science and Technologies Department, Brookhaven National Laboratory, Upton, NY, USA
Meinrat O. Andreae
Multiphase Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany
Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093, USA
Ulrich Pöschl
Multiphase Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany
Christopher Pöhlker
Multiphase Chemistry Department, Max Planck Institute for Chemistry, 55128 Mainz, Germany
Paulo Artaxo
Department of Applied Physics, Institute of Physics, University of São Paulo, São Paulo 05508-900, Brazil
Center for Sustainable Amazon Studies (CEAS), University of São Paulo, São Paulo, Brazil
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Short summary
This study highlights the different aerosol populations that are commonly observed in the central Amazon. Vertical gradients of aerosol optical and chemical properties were evaluated on different atmospheric conditions, and showed distinct characteristics of these particles. Intercontinental transport events bring to the region particles with a contrasting chemical composition, while vertical transport processes influence the aerosol properties by promoting the development of coating and aging.
This study highlights the different aerosol populations that are commonly observed in the...
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