Mixing and ageing in the polar lower stratosphere in winter 2015–2016

Krause, Jens; Hoor, Peter; Engel, Andreas; Plöger, Felix; Grooß, Jens-Uwe; Bönisch, Harald; Keber, Timo; Sinnhuber, Björn-Martin; Woiwode, Wolfgang; Oelhaf, Hermann

doi:https://doi.org/10.5194/acp-18-6057-2018

Articles | Volume 18, issue 8

https://doi.org/10.5194/acp-18-6057-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

The Polar Stratosphere in a Changing Climate (POLSTRACC) (ACP/AMT...

https://doi.org/10.5194/acp-18-6057-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 18, issue 8

Research article

|

02 May 2018

Research article |

| 02 May 2018

Mixing and ageing in the polar lower stratosphere in winter 2015–2016

Jens Krause, Peter Hoor, Andreas Engel, Felix Plöger, Jens-Uwe Grooß, Harald Bönisch, Timo Keber, Björn-Martin Sinnhuber, Wolfgang Woiwode, and Hermann Oelhaf

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Final revised paper (published on 02 May 2018)
Preprint (discussion started on 26 Oct 2017)

Interactive discussion

Status: closed

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

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RC1: 'Review of “Mixing and ageing in the polar lower stratosphere in winter 2015/2016” by J. Krause et al.', Anonymous Referee #1, 02 Nov 2017
- AC1: 'Responses to Referee 1', Jens Krause, 23 Feb 2018
RC2: 'Review of Krause et al.', Eric Ray, 21 Nov 2017
- AC2: 'Responses to Eric Ray', Jens Krause, 23 Feb 2018
RC3: 'Review of Krause et al', Anonymous Referee #3, 05 Dec 2017
- AC3: 'Responses to Referee 3', Jens Krause, 23 Feb 2018

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Jens Krause on behalf of the Authors (23 Feb 2018) Author's response Manuscript

ED: Referee Nomination & Report Request started (06 Mar 2018) by Martyn Chipperfield

RR by Anonymous Referee #3 (13 Mar 2018)

RR by Eric Ray (19 Mar 2018)

ED: Publish as is (01 Apr 2018) by Martyn Chipperfield

Short summary

We present tracer measurements of CO and N₂O measured during the POLSTRACC aircraft campaign in winter 2015–2016. We found enhanced CO values relative to N₂O in the polar lower stratosphere in addition to the ageing of this region during winter. By using model simulations it was possible to link this enhancement to an increased mixing of the tropical tropopause. We thus conclude that the polar lower stratosphere in late winter is strongly influenced by quasi-isentropic mixing from the tropics.