Gas exchange estimates in the Peruvian upwelling regime biased by multi-day near-surface stratification

Fischer, Tim; Kock, Annette; Arévalo-Martínez, Damian L.; Dengler, Marcus; Brandt, Peter; Bange, Hermann W.

doi:https://doi.org/10.5194/bg-16-2307-2019

Articles | Volume 16, issue 11

https://doi.org/10.5194/bg-16-2307-2019

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

https://doi.org/10.5194/bg-16-2307-2019

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

Articles | Volume 16, issue 11

Research article

|

05 Jun 2019

Research article |

| 05 Jun 2019

Gas exchange estimates in the Peruvian upwelling regime biased by multi-day near-surface stratification

Tim Fischer, Annette Kock, Damian L. Arévalo-Martínez, Marcus Dengler, Peter Brandt, and Hermann W. Bange

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Final revised paper (published on 05 Jun 2019)
Preprint (discussion started on 04 Oct 2018)

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 #1, 20 Dec 2018
- AC1: 'Answer to referee comments #1', Tim Fischer, 27 Mar 2019
RC2: 'Review', Jorge Vasquez, 27 Feb 2019
- AC2: 'Answer to Referee Comments #2', Tim Fischer, 27 Mar 2019

Peer-review completion

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

ED: Publish subject to minor revisions (review by editor) (31 Mar 2019) by S. Wajih A. Naqvi

AR by Tim Fischer on behalf of the Authors (06 May 2019) Author's response Manuscript

ED: Publish as is (08 May 2019) by S. Wajih A. Naqvi

AR by Tim Fischer on behalf of the Authors (13 May 2019) Manuscript

Short summary

We investigated air–sea gas exchange in oceanic upwelling regions for the case of nitrous oxide off Peru. In this region, routine concentration measurements from ships at 5 m or 10 m depth prove to overestimate surface (bulk) concentration. Thus, standard estimates of gas exchange will show systematic error. This is due to very shallow stratified layers that inhibit exchange between surface water and waters below and can exist for several days. Maximum bias occurs in moderate wind conditions.