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

Samtleben, Nadja; Kuchař, Aleš; Šácha, Petr; Pišoft, Petr; Jacobi, Christoph

doi:https://doi.org/10.5194/angeo-38-95-2020

Articles | Volume 38, issue 1

https://doi.org/10.5194/angeo-38-95-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/angeo-38-95-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 38, issue 1

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, Aleš Kuchař, Petr Šácha, Petr Pišoft, and Christoph Jacobi

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Final revised paper (published on 23 Jan 2020)
Preprint (discussion started on 23 Aug 2019)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'reviewer comment', Anonymous Referee #1, 25 Sep 2019
- AC1: 'Answer RV 1', Nadja Samtleben, 30 Sep 2019
RC2: 'review', Anonymous Referee #2, 16 Oct 2019
- AC2: 'Answer RV 2', Nadja Samtleben, 17 Oct 2019

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

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.