Atmospheric Chemistry and Physics
Atmospheric Chemistry and Physics
ACP
Articles | Volume 25, issue 18
Articles | Volume 25, issue 18
https://doi.org/10.5194/acp-25-11233-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-25-11233-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 25, issue 18
Research article
 | 
25 Sep 2025
Research article |  | 25 Sep 2025

Refractive index enhancement by secondary organic aerosol formation in humid southern China challenges model assumptions

Junlin Shen, Ye Kuang, Li Liu, Fengling Yuan, Biao Luo, Hongqing Qiao, Miaomiao Zhai, Gang Zhao, Hanbing Xu, Fei Li, Yu Zou, Tao Deng, and Xuejiao Deng

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Short summary

This study provides direct observational evidence that secondary organic aerosol formation enhances the aerosol scattering refractive index and has substantially higher real refractive indices than primary organic aerosols in humid southern China, challenging current model assumptions and offering recommended values that might improve the accuracy of aerosol radiative effect simulations.

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