Articles | Volume 20, issue 19
https://doi.org/10.5194/acp-20-11593-2020
© Author(s) 2020. 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-20-11593-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
12 Oct 2020
Research article |
| 12 Oct 2020
| 12 Oct 2020
Optical properties and composition of viscous organic particles found in the Southern Great Plains
Department of Chemistry, University of the Pacific, Stockton, California 95204, USA
Daniel J. Bonanno
Department of Chemistry, University of the Pacific, Stockton, California 95204, USA
Swarup China
Environmental Molecular Sciences Laboratory, Pacific Northwest
National Laboratory (PNNL), Richland, Washington 99352, USA
Don Q. Pham
Department of Chemistry, University of the Pacific, Stockton, California 95204, USA
Daniel Veghte
Center for Electron Microscopy and Analysis, The Ohio State University, Columbus, Ohio 43212, USA
Johannes Weis
Chemical Sciences Division, Lawrence Berkeley National Laboratory,
Berkeley, California 94720, USA
Department of Chemistry, University of California, Berkeley, California 94720, USA
current address: Physikalisches Institut, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
Gourihar Kulkarni
Environmental Molecular Sciences Laboratory, Pacific Northwest
National Laboratory (PNNL), Richland, Washington 99352, USA
Ken Teske
Atmospheric Radiation Monitoring (Southern Great Plains Climate Research Facility), Billings, Oklahoma 74630, USA
Mary K. Gilles
Chemical Sciences Division, Lawrence Berkeley National Laboratory,
Berkeley, California 94720, USA
Alexander Laskin
Environmental Molecular Sciences Laboratory, Pacific Northwest
National Laboratory (PNNL), Richland, Washington 99352, USA
current address: Chemistry Department, Purdue University, West Lafayette, Indiana 47907, USA
Ryan C. Moffet
Department of Chemistry, University of the Pacific, Stockton, California 95204, USA
current address: Sonoma Technology, Petaluma, California 94954, USA
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Short summary
High viscosity organic particles (HVOPs) in the Southern Great Plains have been analyzed, and two particle types were found. Previously studied tar balls and the recently discovered airborne soil organic particles (ASOPs) are both shown to be brown carbon (BrC). These particle types can be identified in bulk by an absorption Ångström exponent approaching 2.6. HVOP types can be differentiated by comparing carbon absorption spectrum peak ratios between the carboxylic acid, alcohol, and sp2 peaks.
High viscosity organic particles (HVOPs) in the Southern Great Plains have been analyzed, and...
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