Articles | Volume 20, issue 16
https://doi.org/10.5194/acp-20-9701-2020
https://doi.org/10.5194/acp-20-9701-2020
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

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Latest update: 01 Nov 2024
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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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