Articles | Volume 2, issue 1
https://doi.org/10.5194/wcd-2-37-2021
https://doi.org/10.5194/wcd-2-37-2021
Research article
 | 
18 Jan 2021
Research article |  | 18 Jan 2021

Mid-level convection in a warm conveyor belt accelerates the jet stream

Nicolas Blanchard, Florian Pantillon, Jean-Pierre Chaboureau, and Julien Delanoë

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AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Florian Pantillon on behalf of the Authors (12 Jan 2021)  Author's response    Manuscript
ED: Publish subject to technical corrections (14 Jan 2021) by Lukas Papritz
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Short summary
Rare aircraft observations in the warm conveyor belt outflow associated with an extratropical cyclone are complemented with convection-permitting simulations. They reveal a complex tropopause structure with two jet stream cores, from which one is reinforced by bands of negative potential vorticity. They show that negative potential vorticity takes its origin in mid-level convection, which indirectly accelerates the jet stream and, thus, may influence the downstream large-scale circulation.