Consumption of CH3Cl, CH3Br, and CH3I and emission of CHCl3, CHBr3, and CH2Br2 from the forefield of a retreating Arctic glacier

Macdonald, Moya L.; Wadham, Jemma L.; Young, Dickon; Lunder, Chris R.; Hermansen, Ove; Lamarche-Gagnon, Guillaume; O'Doherty, Simon

doi:https://doi.org/10.5194/acp-20-7243-2020

Articles | Volume 20, issue 12

https://doi.org/10.5194/acp-20-7243-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/acp-20-7243-2020

© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 20, issue 12

Research article

|

23 Jun 2020

Research article |

| 23 Jun 2020

Consumption of CH₃Cl, CH₃Br, and CH₃I and emission of CHCl₃, CHBr₃, and CH₂Br₂ from the forefield of a retreating Arctic glacier

Moya L. Macdonald, Jemma L. Wadham, Dickon Young, Chris R. Lunder, Ove Hermansen, Guillaume Lamarche-Gagnon, and Simon O'Doherty

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Final revised paper (published on 23 Jun 2020)
Preprint (discussion started on 06 Dec 2019)

Interactive discussion

Status: closed

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

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RC1: 'Referee comment', Anonymous Referee #1, 11 Jan 2020
RC2: 'Review of acp-2019-943', Anonymous Referee #2, 21 Feb 2020
AC1: 'Authors' response to reviewer comments', Moya Macdonald, 17 Apr 2020

Peer-review completion

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

AR by Moya Macdonald on behalf of the Authors (17 Apr 2020) Author's response Manuscript

ED: Publish subject to technical corrections (12 May 2020) by Andreas Engel

AR by Moya Macdonald on behalf of the Authors (14 May 2020) Author's response Manuscript

Short summary

Climate change has caused glaciers in the Arctic to shrink, uncovering new soils. We used field measurements to study the exchange of a group of gases involved in ozone destruction, called halocarbons, between these new soils and the atmosphere. We found that mats of cyanobacteria, early colonisers of soils, are linked to a larger-than-expected exchange of halocarbons with the atmosphere. We also found that gases which are commonly thought to be marine in origin were released from these soils.