Brief Communication: Ikaite (CaCO3·6H2O) discovered in Arctic sea ice 1Alfred Wegener Institute for Polar and Marine Research, Am Handelshafen 12, 27570 Bremerhaven, Germany
28 May 2010
2Karlsruhe Institute of Technology, Institute for Synchrotron Radiation, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
3Norwegian Polar Institute, Polar Environmental Centre, 9296 Tromsø, Norway
4School of Ocean Sciences, Bangor University, Menai Bridge, Anglesey, LL59 5AB, UK
Received: 18 January 2010 – Published in The Cryosphere Discuss.: 09 February 2010 Abstract. We report for the first time on the discovery of calcium carbonate crystals
as ikaite (CaCO3·6H2O) 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
Revised: 17 May 2010 – Accepted: 25 May 2010 – Published: 28 May 2010
Citation: Dieckmann, G. S., Nehrke, G., Uhlig, C., Göttlicher, J., Gerland, S., Granskog, M. A., and Thomas, D. N.: Brief Communication: Ikaite (CaCO3·6H2O) discovered in Arctic sea ice, The Cryosphere, 4, 227-230, doi:10.5194/tc-4-227-2010, 2010.