Atmospheric N<sub>2</sub>O and CH<sub>4</sub> total columns retrieved from low-resolution Fourier transform infrared (FTIR) spectra (Bruker VERTEX 70) in the mid-infrared region

Zhou, Minqiang; Langerock, Bavo; Sha, Mahesh Kumar; Hermans, Christian; Kumps, Nicolas; Kivi, Rigel; Heikkinen, Pauli; Petri, Christof; Notholt, Justus; Chen, Huilin; De Mazière, Martine

doi:https://doi.org/10.5194/amt-16-5593-2023

Articles | Volume 16, issue 22

https://doi.org/10.5194/amt-16-5593-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/amt-16-5593-2023

© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 16, issue 22

Research article

|

21 Nov 2023

Research article |

| 21 Nov 2023

Atmospheric N₂O and CH₄ total columns retrieved from low-resolution Fourier transform infrared (FTIR) spectra (Bruker VERTEX 70) in the mid-infrared region

Minqiang Zhou, Bavo Langerock, Mahesh Kumar Sha, Christian Hermans, Nicolas Kumps, Rigel Kivi, Pauli Heikkinen, Christof Petri, Justus Notholt, Huilin Chen, and Martine De Mazière

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Final revised paper (published on 21 Nov 2023)
Preprint (discussion started on 03 Jun 2022)

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Status: closed

RC1:
'Comment on amt-2022-17', Anonymous Referee #1, 05 Jul 2022

Please see attached.

Citation: https://doi.org/10.5194/amt-2022-17-RC1
- AC1: 'Reply on RC1', minqiang zhou, 20 Apr 2023
  
  The comment was uploaded in the form of a supplement: https://amt.copernicus.org/preprints/amt-2022-17/amt-2022-17-AC1-supplement.pdf
  
  Citation: https://doi.org/10.5194/amt-2022-17-AC1
RC2:
'Comment on amt-2022-17', Dietrich G. Feist, 08 Sep 2023
Dear authors,
first I have to apologize for the long time that this manuscript has spent in review. It was extremely difficult to find reviewers that were not connected with the FRM4GHG project. This project includes a large part of the FTIR community. From the ones I identified, 6 were unavailable, declined or had a conflict of interests. Therefore, I would like to extend special thanks to anonymous reviewer #1 who provided a thorough report on time.
Unfortunately, the whole process took place while I was absorbed by tragic family matters for several months. The backlog that piled up while I was hardly able to work also delayed this review process. I appreciate your understanding that the first author Minqiang Zhou has expressed to me personally already.
Not being able to come up with 2 reviewers in the end, I am forced to resort to an editor's review to finish the process. My own FTIR experience is limited to TCCON hi-resolution retrievals with GGG on the IFS125HR. My experience with NDACC, SFIT4 and low-resolution retrievals is very limited. Therefore, I would only add the minor comments below and leave the detailed corrections to the report already provided by reviewer #1.
Kind regards
Dietrich Feist
Comments:
I find the naming of the bands 1-6, V1, V2, 3V2, 4V2 confusing. For clarity, please provide a table that describes the major parameters (wave number range, instrument, species retrieved).

p. 14, l. 7: Do you mean standard deviation with "stds"? Please spell out to avoid confusion.
Citation: https://doi.org/10.5194/amt-2022-17-RC2
- AC2: 'Reply on RC2', minqiang zhou, 14 Sep 2023
  
  The comment was uploaded in the form of a supplement: https://amt.copernicus.org/preprints/amt-2022-17/amt-2022-17-AC2-supplement.pdf
  
  Citation: https://doi.org/10.5194/amt-2022-17-AC2

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload

AR by minqiang zhou on behalf of the Authors (14 Sep 2023) Author's response Author's tracked changes Manuscript

ED: Publish as is (10 Oct 2023) by Dietrich G. Feist

AR by minqiang zhou on behalf of the Authors (11 Oct 2023) Manuscript

Short summary

Atmospheric N₂O and CH₄ columns are successfully retrieved from low-resolution FTIR spectra recorded by a Bruker VERTEX 70. The 1-year measurements at Sodankylä show that the N₂O total columns retrieved from 125HR and VERTEX 70 spectra are −0.3 ± 0.7 % with an R value of 0.93. The relative differences between the CH₄ total columns retrieved from the 125HR and VERTEX spectra are 0.0 ± 0.8 % with an R value of 0.87. Such a technique can help to fill the gap in NDACC N₂O and CH₄ measurements.

Atmospheric N2O and CH4 total columns retrieved from low-resolution Fourier transform infrared (FTIR) spectra (Bruker VERTEX 70) in the mid-infrared region

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Peer review completion

Atmospheric N₂O and CH₄ total columns retrieved from low-resolution Fourier transform infrared (FTIR) spectra (Bruker VERTEX 70) in the mid-infrared region