An incoherent broadband cavity-enhanced absorption spectrometer for simultaneous NO3 and N2O5 measurements, integrated into a NOy instrument suite: characterization and first field deployment

Dewald, Patrick; Harb, Sergio; Picquet-Varrault, Bénédicte; Cazaunau, Mathieu; Feingesicht, Maxime; Beltran, Lucas; Michoud, Vincent; Landsheere, Xavier; Pangui, Edouard; Bergé, Antonin; Cantrell, Christopher; Cirtog, Manuela

doi:10.5194/amt-19-7421-2026

Articles | Volume 19, issue 21

https://doi.org/10.5194/amt-19-7421-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Atmospheric Chemistry of the Suburban Forest – multiplatform...

https://doi.org/10.5194/amt-19-7421-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 21

Research article

|

13 Nov 2026

Research article |

| 13 Nov 2026

An incoherent broadband cavity-enhanced absorption spectrometer for simultaneous NO₃ and N₂O₅ measurements, integrated into a NO_y instrument suite: characterization and first field deployment

Patrick Dewald, Sergio Harb, Bénédicte Picquet-Varrault, Mathieu Cazaunau, Maxime Feingesicht, Lucas Beltran, Vincent Michoud, Xavier Landsheere, Edouard Pangui, Antonin Bergé, Christopher Cantrell, and Manuela Cirtog

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Final revised paper (published on 13 Nov 2026)
Supplement to the final revised paper
Preprint (discussion started on 09 Sep 2026)
Supplement to the preprint

Interactive discussion

Status: closed

RC1:
'Comment on egusphere-2026-5307', Anonymous Referee #1, 04 Oct 2026

The comment was uploaded in the form of a supplement: https://egusphere.copernicus.org/preprints/2026/egusphere-2026-5307/egusphere-2026-5307-RC1-supplement.pdf

Citation: https://doi.org/10.5194/egusphere-2026-5307-RC1
- AC1: 'Reply on RC1', Patrick Dewald, 02 Nov 2026
  
  The comment was uploaded in the form of a supplement: https://egusphere.copernicus.org/preprints/2026/egusphere-2026-5307/egusphere-2026-5307-AC1-supplement.pdf
  
  Citation: https://doi.org/10.5194/egusphere-2026-5307-AC1
RC2:
'Comment on egusphere-2026-5307', Anonymous Referee #2, 08 Oct 2026

The comment was uploaded in the form of a supplement: https://egusphere.copernicus.org/preprints/2026/egusphere-2026-5307/egusphere-2026-5307-RC2-supplement.pdf

Citation: https://doi.org/10.5194/egusphere-2026-5307-RC2
- AC2: 'Reply on RC2', Patrick Dewald, 02 Nov 2026
  
  The comment was uploaded in the form of a supplement: https://egusphere.copernicus.org/preprints/2026/egusphere-2026-5307/egusphere-2026-5307-AC2-supplement.pdf
  
  Citation: https://doi.org/10.5194/egusphere-2026-5307-AC2

Peer review completion

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

AR by Patrick Dewald on behalf of the Authors (02 Nov 2026) Author's response Author's tracked changes Manuscript

ED: Publish as is (03 Nov 2026) by Hendrik Fuchs

AR by Patrick Dewald on behalf of the Authors (04 Nov 2026) Manuscript

Short summary

We built an instrument to measure reactive nitrogen compounds in the atmosphere with a focus on the detection of nitrate radicals. They are formed by pollutants such as ozone and nitrogen oxides and are an important nocturnal oxidant of trace gases, thereby indirectly impacting the interconversion of reactive nitrogen and air quality. The instrument’s characterization, performance assessment and the first field deployment are presented.