On the improved stability of the version 7 MIPAS ozone record

Laeng, Alexandra; Eckert, Ellen; von Clarmann, Thomas; Kiefer, Michael; Hubert, Daan; Stiller, Gabriele; Glatthor, Norbert; López-Puertas, Manuel; Funke, Bernd; Grabowski, Udo; Plieninger, Johannes; Kellmann, Sylvia; Linden, Andrea; Lossow, Stefan; Babenhauserheide, Arne; Froidevaux, Lucien; Walker, Kaley

doi:https://doi.org/10.5194/amt-11-4693-2018

Articles | Volume 11, issue 8

https://doi.org/10.5194/amt-11-4693-2018

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

Special issue:

Quadrennial Ozone Symposium 2016 – Status and trends...

https://doi.org/10.5194/amt-11-4693-2018

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

Articles | Volume 11, issue 8

Research article

|

10 Aug 2018

Research article |

| 10 Aug 2018

On the improved stability of the version 7 MIPAS ozone record

Alexandra Laeng, Ellen Eckert, Thomas von Clarmann, Michael Kiefer, Daan Hubert, Gabriele Stiller, Norbert Glatthor, Manuel López-Puertas, Bernd Funke, Udo Grabowski, Johannes Plieninger, Sylvia Kellmann, Andrea Linden, Stefan Lossow, Arne Babenhauserheide, Lucien Froidevaux, and Kaley Walker

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Final revised paper (published on 10 Aug 2018)
Preprint (discussion started on 01 Nov 2017)

Interactive discussion

Status: closed

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

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- Supplement

RC1: 'review of Laeng et al.', Anonymous Referee #1, 06 Dec 2017
- AC1: 'Answer to Reviewer 1', Alexandra Laeng, 27 Feb 2018
RC2: 'Review of "On the improved stability of the version 7 MIPAS ozone record"', Anonymous Referee #2, 18 Dec 2017
- AC1: 'Answer to Reviewer 1', Alexandra Laeng, 27 Feb 2018

Peer-review completion

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

AR by Alexandra Laeng on behalf of the Authors (05 Jun 2018) Author's response Manuscript

ED: Referee Nomination & Report Request started (15 Jun 2018) by Sophie Godin-Beekmann

RR by Anonymous Referee #2 (22 Jun 2018)

RR by Anonymous Referee #1 (28 Jun 2018)

Suggestions for revision or reasons for rejection

The revision of this paper is substantially improved and has met the concerns of the original reviews. The only remaining substantial issue is the organization of the paper (plus a few minor points and spelling and grammar mistakes that the authors should attend to).

In terms of organization, the early sections of the paper are laid out in a confusing order. Figure 2 is called out before Figure 1, and the discussion surrounding Figure 1 comes much later. Then the effect of the changes in the retrieval on ozone trends are discussed immediately at the end of section 2.1 before anything to do with ozone trends, including methodology, are mentioned and/or referenced (this comes much later in section 4). I realize that they are addressing two different issues (retrieval updates and level 1 spectra updates), however the authors need to review the overall story of the paper once more and organize appropriately.

Two other smaller issues:
(1) The claim made at the end of section 2.3 on the “clear improvement” in the UTLS. This is certainly not clear from the figure. More philosophically, if a profile has both high and low biases at various altitudes and a change is made that results in a simple shift of the entire profile (as seems to be the case here), is it fair to say that the regions now closer to zero are improved?
(2) The claim that the drift is “clearly linear” at the end of section 3.2 is unsubstantiated.

Corrections:
- Page 3, line 25: “change as to 2D field”
- Page 4, line 12: reference CCMI-REFC1SD
- Page 5, line 5: “compared i climatological”
- Page 7, line 5: “desactivated”
- Page 7, line 11: “inidividual"
- Page 7, line 18: rephrase “non-trustful” here and elsewhere
- Page 7, line 19: “The is no”
- Page 10, line 8: “are not be visible”
- Page 13, line 6: “see the Figure 9”
- Page 14, line 21: not a sentence
- Page 17, line 16: “access” is not a good choice of wording here

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ED: Publish subject to minor revisions (review by editor) (10 Jul 2018) by Sophie Godin-Beekmann

AR by Alexandra Laeng on behalf of the Authors (26 Jul 2018) Author's response Manuscript

ED: Publish as is (01 Aug 2018) by Sophie Godin-Beekmann

AR by Alexandra Laeng on behalf of the Authors (03 Aug 2018) Manuscript

Short summary

MIPAS was an IR limb emission spectrometer on the Envisat platform. From 2002 to 2012, it performed pole-to-pole measurements of ozone during day and night. ESA recently released the new version 7 of Level 1 MIPAS spectra, which is expected to reduce the long-term drift of the MIPAS Level 2 data. We evaluate the long-term stability of ozone Level 2 data from the KIT IMK processor. Our results indicate that MIPAS data are now even more suited for trend studies, alone or as part of merged data.