Brief Communication: Ikaite (CaCO3·6H2O) discovered in Arctic sea ice

We report for the first time on the discovery of calcium carbonate crystals as ikaite (CaCO 3 ·6H 2 O) in sea ice from the Arctic (Kongsfjorden, Svalbard) as confirmed by morphology and indirectly by X-ray diffraction as well as XANES spectroscopy of its amorophous decomposition product. This findin...

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Bibliographic Details
Published in:The Cryosphere
Main Authors: Dieckmann, G. S., Nehrke, G., Uhlig, C., Göttlicher, J., Gerland, S., Granskog, M. A., Thomas, D. N.
Format: Text
Language:English
Published: 2018
Subjects:
Antarctic
Arctic
Svalbard
The Antarctic
Antarc*
Kongsfjord*
Kongsfjorden
Sea ice
Online Access:https://doi.org/10.5194/tc-4-227-2010
https://tc.copernicus.org/articles/4/227/2010/
Description
Summary:We report for the first time on the discovery of calcium carbonate crystals as ikaite (CaCO 3 ·6H 2 O) in sea ice from the Arctic (Kongsfjorden, Svalbard) as confirmed by morphology and indirectly by X-ray diffraction as well as XANES spectroscopy of its amorophous decomposition product. This finding demonstrates that the precipitation of calcium carbonate during the freezing of sea ice is not restricted to the Antarctic, where it was observed for the first time in 2008. This observation is an important step in the quest to quantify its impact on the sea ice driven carbon cycle.

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