Articles | Volume 17, issue 19
https://doi.org/10.5194/acp-17-11779-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/acp-17-11779-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
05 Oct 2017
Research article |
| 05 Oct 2017
CCN activity and organic hygroscopicity of aerosols downwind of an urban region in central Amazonia: seasonal and diel variations and impact of anthropogenic emissions
Ryan Thalman
Environmental and Climate Sciences Department, Brookhaven
National Laboratory, Upton, NY, USA
now at: Department of Chemistry, Snow College, Richfield, UT,
USA
Suzane S. de Sá
School of Engineering and Applied Sciences, Harvard
University, Cambridge, MA, USA
Brett B. Palm
Department of Chemistry and Biochemistry and Cooperative
Institute for Research in Environmental Sciences (CIRES), University
of Colorado Boulder, Boulder, CO, USA
Henrique M. J. Barbosa
Physics Institute, University of São Paulo, São
Paulo, Brazil
Mira L. Pöhlker
Biogeochemistry and Multiphase Chemistry
Departments, Max Planck Institute for Chemistry, Mainz, Germany
M. Lizabeth Alexander
Pacific Northwest National Laboratory, Richland, WA, USA
Joel Brito
Physics Institute, University of São Paulo, São
Paulo, Brazil
now at: Laboratory for Meteorological Physics, Université
Clermont Auvergne, Clermont-Ferrand, France
Samara Carbone
Physics Institute, University of São Paulo, São
Paulo, Brazil
Paulo Castillo
Environmental and Climate Sciences Department, Brookhaven
National Laboratory, Upton, NY, USA
Douglas A. Day
Department of Chemistry and Biochemistry and Cooperative
Institute for Research in Environmental Sciences (CIRES), University
of Colorado Boulder, Boulder, CO, USA
Chongai Kuang
Environmental and Climate Sciences Department, Brookhaven
National Laboratory, Upton, NY, USA
Antonio Manzi
National Institute of Amazonian Research, Manaus, Amazonas,
Brazil
Nga Lee Ng
School of Chemical and Biomolecular Engineering, Georgia
Institute of Technology, Atlanta, GA, USA
School of Earth and Atmospheric Sciences, Georgia Institute
of Technology, Atlanta, GA, USA
Arthur J. Sedlacek III
Environmental and Climate Sciences Department, Brookhaven
National Laboratory, Upton, NY, USA
Rodrigo Souza
Amazonas State University, Manaus, Amazonas, Brazil
Stephen Springston
Environmental and Climate Sciences Department, Brookhaven
National Laboratory, Upton, NY, USA
Thomas Watson
Environmental and Climate Sciences Department, Brookhaven
National Laboratory, Upton, NY, USA
Christopher Pöhlker
Biogeochemistry and Multiphase Chemistry
Departments, Max Planck Institute for Chemistry, Mainz, Germany
Ulrich Pöschl
Biogeochemistry and Multiphase Chemistry
Departments, Max Planck Institute for Chemistry, Mainz, Germany
Meinrat O. Andreae
Biogeochemistry and Multiphase Chemistry
Departments, Max Planck Institute for Chemistry, Mainz, Germany
Scripps Institution of Oceanography, University of
California San Diego, La Jolla, CA, USA
Paulo Artaxo
Physics Institute, University of São Paulo, São
Paulo, Brazil
Jose L. Jimenez
Department of Chemistry and Biochemistry and Cooperative
Institute for Research in Environmental Sciences (CIRES), University
of Colorado Boulder, Boulder, CO, USA
Scot T. Martin
School of Engineering and Applied Sciences, Harvard
University, Cambridge, MA, USA
Department of Earth and Planetary Sciences, Harvard
University, Cambridge, MA, USA
Environmental and Climate Sciences Department, Brookhaven
National Laboratory, Upton, NY, USA
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Short summary
Particle hygroscopicity, mixing state, and the hygroscopicity of organic components were characterized in central Amazonia for 1 year; their seasonal and diel variations were driven by a combination of primary emissions, photochemical oxidation, and boundary layer development. The relationship between the hygroscopicity of organic components and their oxidation level was examined, and the results help to reconcile the differences among the relationships observed in previous studies.
Particle hygroscopicity, mixing state, and the hygroscopicity of organic components were...
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