Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 26, issue 18
Articles | Volume 26, issue 18
https://doi.org/10.5194/acp-26-13303-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-13303-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 18
Research article
 | 
22 Sep 2026
Research article |  | 22 Sep 2026

Apportioning light absorption of ambient aerosols to black carbon, brown carbon, and lensing effect using a PAX-ISS hybrid method: insights into absorption enhancement

Yi Shen, Guorui Zhi, Wenjing Jin, Yao Kong, Yuzhe Zhang, Zhengying Li, Jianzhong Sun, Yuankai Wang, and Zhijian Liang

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Short summary
A novel PAX-ISS method apportions aerosol light absorption to black carbon (BC), brown carbon (BrC), and the lensing effect. Field measurements reveal BC dominance, ~10 % annual BrC contribution, and a 40.0 % average lensing role in light absorption with strong spectral-seasonal variations. We provide observational indications of BrC's shortwave "blocking effect", which offsets lensing. This approach offers robust constraints for aerosol optics and climate modeling.
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