Articles | Volume 23, issue 24
https://doi.org/10.5194/acp-23-15365-2023
https://doi.org/10.5194/acp-23-15365-2023
Research article
 | 
15 Dec 2023
Research article |  | 15 Dec 2023

The role of a low-level jet for stirring the stable atmospheric surface layer in the Arctic

Ulrike Egerer, Holger Siebert, Olaf Hellmuth, and Lise Lotte Sørensen

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Latest update: 08 May 2024
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Short summary
Low-level jets (LLJs) are strong winds near the surface and occur frequently in the Arctic in stable conditions. Using tethered-balloon profile measurements in Greenland, we analyze a multi-hour period with an LLJ that later weakens and finally collapses. Increased shear-induced turbulence at the LLJ bounds mostly does not reach the ground until the LLJ collapses. Our findings support the hypothesis that a passive tracer can be advected with an LLJ and mixed down when the LLJ collapses.
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