Articles | Volume 20, issue 19
Atmos. Chem. Phys., 20, 11593–11606, 2020
https://doi.org/10.5194/acp-20-11593-2020
Atmos. Chem. Phys., 20, 11593–11606, 2020
https://doi.org/10.5194/acp-20-11593-2020

Research article 12 Oct 2020

Research article | 12 Oct 2020

Optical properties and composition of viscous organic particles found in the Southern Great Plains

Matthew Fraund et al.

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SGP HISCALE STXM Images and Spectra Matthew Fraund https://doi.org/10.17605/OSF.IO/G8FPW

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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.
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