Articles | Volume 10, issue 5
https://doi.org/10.5194/tc-10-2173-2016
https://doi.org/10.5194/tc-10-2173-2016
Research article
 | 
21 Sep 2016
Research article |  | 21 Sep 2016

Estimates of ikaite export from sea ice to the underlying seawater in a sea ice–seawater mesocosm

Nicolas-Xavier Geilfus, Ryan J. Galley, Brent G. T. Else, Karley Campbell, Tim Papakyriakou, Odile Crabeck, Marcos Lemes, Bruno Delille, and Søren Rysgaard

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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Nicolas-Xavier Geilfus on behalf of the Authors (13 May 2016)  Author's response
ED: Referee Nomination & Report Request started (18 May 2016) by Lars Kaleschke
RR by Anonymous Referee #3 (15 Jun 2016)
RR by Anonymous Referee #4 (29 Jun 2016)
ED: Publish subject to minor revisions (Editor review) (12 Jul 2016) by Lars Kaleschke
AR by Nicolas-Xavier Geilfus on behalf of the Authors (13 Jul 2016)  Author's response    Manuscript
ED: Publish subject to minor revisions (Editor review) (11 Aug 2016) by Lars Kaleschke
AR by Nicolas-Xavier Geilfus on behalf of the Authors (12 Aug 2016)  Author's response    Manuscript
ED: Publish as is (15 Aug 2016) by Lars Kaleschke
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Short summary
The fate of ikaite precipitation within sea ice is poorly understood. In this study, we estimated ikaite precipitation of up to 167 µmol kg-1 within sea ice, while its export and dissolution into the underlying seawater was responsible for a TA increase of 64–66 μmol kg-1. We estimated that more than half of the total ikaite precipitated was still contained in the ice when sea ice began to melt. The dissolution of the ikaite crystals in the water column kept the seawater pCO2 undersaturated.