Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 20, issue 16
Articles | Volume 20, issue 16
https://doi.org/10.5194/acp-20-9701-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-20-9701-2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 20, issue 16
Research article
 | 
19 Aug 2020
Research article |  | 19 Aug 2020

The absorption Ångstrom exponent of black carbon with brown coatings: effects of aerosol microphysics and parameterization

Xiaolin Zhang, Mao Mao, Yan Yin, and Shihao Tang

Supplement

https://doi.org/10.5194/acp-20-9701-2020-supplement

Data sets

xiaolinzhang/Data_FOR_ACP-2020-224: ACP-2020-224 X. Zhang https://doi.org/10.5281/zenodo.3986854

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Short summary
The understanding of the absorption Ångstrom exponent (AAE) of aged black carbon (BC) particles affected by their microphysics is numerically evaluated. With key sensitive microphysical parameters, a simple parameterization of the AAE of coated BC with a size distribution is proposed. It is found that BC coated by thin brown carbon with more large particles shows an AAE smaller than pure BC particles. Our findings improve the understanding and application of the AAE of BC with brown coatings.
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