Articles | Volume 2, issue 1
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


Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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Peer-review completion

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
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.