Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 18, issue 16
Articles | Volume 18, issue 16
https://doi.org/10.5194/amt-18-4045-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-18-4045-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 18, issue 16
Research article
 | 
28 Aug 2025
Research article |  | 28 Aug 2025

Numerical quantitation on the effect of coating materials on the mixing state retrieval accuracy of fractal black carbon based on single particle soot photometer

Jia Liu, Donghui Zhou, Guangya Wang, Cancan Zhu, and Xuehai Zhang

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Short summary
Single-particle soot photometer (SP2) measures the mixing state (Dp/Dc) of coated black carbon (BC) using core-shell Mie theory and coating refractive index is set to 1.50+0i. The retrieved Dp/Dc contains error due to the non-sphericity of BC and coatings with various refractive indices. We reveal the remarkable effects of coatings on the Dp/Dc retrieval accuracy of SP2 based on optical simulation of fractal BC aerosols, and further evaluate the simple radiative forcing efficiency of coated BC.
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