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

被引：85

作者：

Dieckmann, G. S. ^{[1
]}

Nehrke, G. ^{[1
]}

Uhlig, C. ^{[1
]}

Goettlicher, J. ^{[2
]}

Gerland, S. ^{[3
]}

Granskog, M. A. ^{[3
]}

Thomas, D. N. ^{[4
]}

机构：

[1] Alfred Wegener Inst Polar & Marine Res, D-27570 Bremerhaven, Germany

[2] Karlsruhe Inst Technol, Inst Synchrotron Radiat, D-76344 Eggenstein Leopoldshafen, Germany

[3] Norwegian Polar Res Inst, Polar Environm Ctr, N-9296 Tromso, Norway

[4] Bangor Univ, Sch Ocean Sci, Menai Bridge LL59 5AB, Anglesey, Wales

来源：

CRYOSPHERE | 2010年 / 4卷 / 02期

关键词：

PRECIPITATION; FJORD; CARBONATE;

D O I：

10.5194/tc-4-227-2010

中图分类号：

P9 [自然地理学];

学科分类号：

0705 ; 070501 ;

摘要：

We report for the first time on the discovery of calcium carbonate crystals as ikaite (CaCO3 center dot 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.

引用

页码：227 / 230

页数：4

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