Recent improvements of long-path DOAS measurements: impact on accuracy and stability of short-term and automated long-term observations

Nasse, Jan-Marcus; Eger, Philipp G.; Pöhler, Denis; Schmitt, Stefan; Frieß, Udo; Platt, Ulrich

doi:https://doi.org/10.5194/amt-12-4149-2019

Articles | Volume 12, issue 8

https://doi.org/10.5194/amt-12-4149-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/amt-12-4149-2019

© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 12, issue 8

Research article

|

01 Aug 2019

Research article |

| 01 Aug 2019

Recent improvements of long-path DOAS measurements: impact on accuracy and stability of short-term and automated long-term observations

Jan-Marcus Nasse, Philipp G. Eger, Denis Pöhler, Stefan Schmitt, Udo Frieß, and Ulrich Platt

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Final revised paper (published on 01 Aug 2019)
Preprint (discussion started on 20 Mar 2019)

Interactive discussion

Status: closed

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

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- Supplement

RC1: 'Review', Anonymous Referee #2, 14 Apr 2019
- AC1: 'Authors' comments to Anonymous Referee #2', Jan-Marcus Nasse, 13 Jun 2019
RC2: 'comments', Anonymous Referee #3, 22 May 2019
- AC2: 'Authors' responses to Anonymous referee #3', Jan-Marcus Nasse, 13 Jun 2019
AC2: 'Authors' responses to Anonymous referee #3', Jan-Marcus Nasse, 13 Jun 2019

Peer-review completion

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

AR by Jan-Marcus Nasse on behalf of the Authors (13 Jun 2019) Author's response Manuscript

ED: Publish as is (22 Jun 2019) by Cheng Liu

AR by Jan-Marcus Nasse on behalf of the Authors (28 Jun 2019) Manuscript

Short summary

We present several changes to the setup of long-path differential optical absorption spectroscopy (LP-DOAS) instruments, including the application of a laser-driven light source, a modified coupling of the measurement signal between components, improved stray-light suppression, and better signal homogenization measures. These changes reduce detection limits of typical trace-gas species by a factor of 3–4 compared to previous setups and enable automated long-term observations in Antarctica.