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-26-13027-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/acp-26-13027-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 26, issue 18
Research article
 | 
16 Sep 2026
Research article |  | 16 Sep 2026

Advanced insights into biomass burning aerosols during the 2023 Canadian wildfires from dual-site Raman and fluorescence lidar observations

Qiaoyun Hu, Philippe Goloub, Igor Veselovskii, Thierry Podvin, Gaël Dubois, Sergey Khaykin, William Boissière, Fabrice Ducos, and Mikhail Korenskiy

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Latest update: 16 Sep 2026
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Short summary
This study reports dual-site fluorescence lidar observations of long-range transported Canadian wildfire biomass burning aerosols (BBAs) from May to September 2023. Upper troposphere–lower stratosphere (UTLS) layers showed higher depolarization, lower Ångström exponents, and fluorescence redshift compared to tropospheric layers. Moderate correlations are found between layer altitude and BBA properties. Notably, limited hygroscopicity was found in more than 100 identified BBA layers. Cross-site comparison shows consistent fluorescence signatures.
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