Articles | Volume 23, issue 21
https://doi.org/10.5194/acp-23-13987-2023
https://doi.org/10.5194/acp-23-13987-2023
Research article
 | 
09 Nov 2023
Research article |  | 09 Nov 2023

Effect of the boundary layer low-level jet on fast fog spatial propagation

Shuqi Yan, Hongbin Wang, Xiaohui Liu, Fan Zu, and Duanyang Liu

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Short summary
In this study, we quantitatively study the effect of the boundary layer low-level jet (BLLJ) on fast fog spatial propagation; i.e., the fog area expands very fast along a certain direction. The wind speed (10 m s−1) and direction (southeast) of the BLLJ core are consistent with fog propagation (9.6 m s−1). The BLLJ-induced temperature and moisture advections are possible reasons for fast fog propagation. The propagation speed would decrease by 6.4 m s−1 if these advections were turned off.
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