Mean age of stratospheric air derived from AirCore observations

Engel, Andreas; Bönisch, Harald; Ullrich, Markus; Sitals, Robert; Membrive, Olivier; Danis, Francois; Crevoisier, Cyril

doi:https://doi.org/10.5194/acp-17-6825-2017

Articles | Volume 17, issue 11

https://doi.org/10.5194/acp-17-6825-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/acp-17-6825-2017

© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 17, issue 11

Research article

|

12 Jun 2017

Research article |

| 12 Jun 2017

Mean age of stratospheric air derived from AirCore observations

Andreas Engel, Harald Bönisch, Markus Ullrich, Robert Sitals, Olivier Membrive, Francois Danis, and Cyril Crevoisier

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Final revised paper (published on 12 Jun 2017)
Preprint (discussion started on 08 Feb 2017)

Interactive discussion

Status: closed

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

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- Supplement

RC1: 'reviewer comment', Darryn Waugh, 03 Mar 2017
- AC1: 'Reply to Review', Andreas Engel, 28 Apr 2017
RC2: 'Review of Engel et al', Eric Ray, 14 Mar 2017
- AC2: 'Reply to Reviewer', Andreas Engel, 28 Apr 2017

Peer-review completion

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

AR by Andreas Engel on behalf of the Authors (28 Apr 2017) Author's response Manuscript

ED: Publish as is (05 May 2017) by Marc von Hobe

Short summary

AirCore is new technique for sampling stratospheric air. We present new observations of CO₂ and CH₄ using AirCore and derive stratospheric transport time, called the mean age of air. The purpose of using AirCore is to provide a cost-effective tool for deriving mean age. Mean age may serve as a proxy to investigate changes in stratospheric circulation. We show that there is no statistically significant trend in our 40-year time series of mean age, which is now extended using AirCore.