Articles | Volume 26, issue 5
https://doi.org/10.5194/acp-26-3489-2026
https://doi.org/10.5194/acp-26-3489-2026
Measurement report
 | 
06 Mar 2026
Measurement report |  | 06 Mar 2026

Measurement report: Observational analysis of mode-dependent fog droplet size distribution evolution and improved parameterization using segmented gamma and lognormal fitting

Jingwen Zhang, Xiaoli Liu, Zhenya An, Jingjing Lv, and Dan Xu

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Fog affects human activities and regional climate, yet our understanding of it remains limited. Based on 27 fog events in Nanjing, this study shows that droplet size distributions evolve among unimodal, bimodal, and trimodal during the fog lifecycle. A new segmented fitting significantly improves the estimation of key microphysical and radiative parameters. These results improve our understanding of fog microphysics and droplet size distribution parameterizations in weather and climate models.
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