Articles | Volume 38, issue 1
Ann. Geophys., 38, 95–108, 2020
https://doi.org/10.5194/angeo-38-95-2020
Ann. Geophys., 38, 95–108, 2020
https://doi.org/10.5194/angeo-38-95-2020

Regular paper 23 Jan 2020

Regular paper | 23 Jan 2020

Impact of local gravity wave forcing in the lower stratosphere on the polar vortex stability: effect of longitudinal displacement

Nadja Samtleben et al.

Download

Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (review by editor) (06 Nov 2019) by Gunter Stober
AR by Nadja Samtleben on behalf of the Authors (18 Nov 2019)  Author's response    Manuscript
ED: Publish as is (15 Dec 2019) by Gunter Stober
AR by Nadja Samtleben on behalf of the Authors (16 Dec 2019)  Author's response    Manuscript
Download
Short summary
The additional transfer of momentum and energy induced by locally breaking gravity wave hotspots in the lower stratosphere may lead to a destabilization of the polar vortex, which is strongly dependent on the position of the hotspot. The simulations with a global circulation model show that hotspots located above Eurasia cause a total decrease in the stationary planetary wave (SPW) activity, while the impact of hotspots located in North America mostly increase the SPW activity.