Characterization of ikaite (CaCO3*6H2O) crystals in first-year Arctic sea ice north of Svalbard: Crystal size and melted-ice total alkalinity
We examined the size distribution of calcium carbonate crystals from first-year Arctic pack ice and overlying snow and slush during spring melt onset north of Svalbard. Ikaite crystals were found mainly in the bottom of the snowpack, in slush and the surface layers of the sea ice, where temperature...
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ftawi:oai:epic.awi.de:30474 2023-05-15T14:27:33+02:00 Characterization of ikaite (CaCO3*6H2O) crystals in first-year Arctic sea ice north of Svalbard: Crystal size and melted-ice total alkalinity Nomura, Daiki Granskog, Mats Assmy, Philipp Nehrke, Gernot Hu, Yubin Fischer, Michael Dieckmann, Gerhard 2012-05 https://epic.awi.de/id/eprint/30474/ https://hdl.handle.net/10013/epic.39388 unknown Nomura, D. , Granskog, M. , Assmy, P. , Nehrke, G. orcid:0000-0002-2851-3049 , Hu, Y. , Fischer, M. and Dieckmann, G. (2012) Characterization of ikaite (CaCO3*6H2O) crystals in first-year Arctic sea ice north of Svalbard: Crystal size and melted-ice total alkalinity , International Glaciology Society - International Symposium on Seasonal Snow and Ice, Lahti, Finland, 28 May 2012 - 1 June 2012 . hdl:10013/epic.39388 EPIC3International Glaciology Society - International Symposium on Seasonal Snow and Ice, Lahti, Finland, 2012-05-28-2012-06-01 Conference notRev 2012 ftawi 2021-12-24T15:37:44Z We examined the size distribution of calcium carbonate crystals from first-year Arctic pack ice and overlying snow and slush during spring melt onset north of Svalbard. Ikaite crystals were found mainly in the bottom of the snowpack, in slush and the surface layers of the sea ice, where temperature was lower and salinity higher than in the ice below. Micrographs showed that ikaite crystals were characterized by a roughly elliptical shape with a mean aspect ratio of 1.8. The mean length of the crystals was 85.8 ± 30.2 µm (mean ±1SD) in the lateral direction and 149.3 ± 55.9 µm in the longitudinal direction. Comparisons of the salinity and the total alkalinity for melted-ice samples through the ice column suggest that the precipitation/dissolution of ikaite crystals occurred at the top of the sea ice during the ice formation/melting processes. Conference Object Arctic Arctic Sea ice Svalbard Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Arctic Svalbard |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
We examined the size distribution of calcium carbonate crystals from first-year Arctic pack ice and overlying snow and slush during spring melt onset north of Svalbard. Ikaite crystals were found mainly in the bottom of the snowpack, in slush and the surface layers of the sea ice, where temperature was lower and salinity higher than in the ice below. Micrographs showed that ikaite crystals were characterized by a roughly elliptical shape with a mean aspect ratio of 1.8. The mean length of the crystals was 85.8 ± 30.2 µm (mean ±1SD) in the lateral direction and 149.3 ± 55.9 µm in the longitudinal direction. Comparisons of the salinity and the total alkalinity for melted-ice samples through the ice column suggest that the precipitation/dissolution of ikaite crystals occurred at the top of the sea ice during the ice formation/melting processes. |
format |
Conference Object |
author |
Nomura, Daiki Granskog, Mats Assmy, Philipp Nehrke, Gernot Hu, Yubin Fischer, Michael Dieckmann, Gerhard |
spellingShingle |
Nomura, Daiki Granskog, Mats Assmy, Philipp Nehrke, Gernot Hu, Yubin Fischer, Michael Dieckmann, Gerhard Characterization of ikaite (CaCO3*6H2O) crystals in first-year Arctic sea ice north of Svalbard: Crystal size and melted-ice total alkalinity |
author_facet |
Nomura, Daiki Granskog, Mats Assmy, Philipp Nehrke, Gernot Hu, Yubin Fischer, Michael Dieckmann, Gerhard |
author_sort |
Nomura, Daiki |
title |
Characterization of ikaite (CaCO3*6H2O) crystals in first-year Arctic sea ice north of Svalbard: Crystal size and melted-ice total alkalinity |
title_short |
Characterization of ikaite (CaCO3*6H2O) crystals in first-year Arctic sea ice north of Svalbard: Crystal size and melted-ice total alkalinity |
title_full |
Characterization of ikaite (CaCO3*6H2O) crystals in first-year Arctic sea ice north of Svalbard: Crystal size and melted-ice total alkalinity |
title_fullStr |
Characterization of ikaite (CaCO3*6H2O) crystals in first-year Arctic sea ice north of Svalbard: Crystal size and melted-ice total alkalinity |
title_full_unstemmed |
Characterization of ikaite (CaCO3*6H2O) crystals in first-year Arctic sea ice north of Svalbard: Crystal size and melted-ice total alkalinity |
title_sort |
characterization of ikaite (caco3*6h2o) crystals in first-year arctic sea ice north of svalbard: crystal size and melted-ice total alkalinity |
publishDate |
2012 |
url |
https://epic.awi.de/id/eprint/30474/ https://hdl.handle.net/10013/epic.39388 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Arctic Sea ice Svalbard |
genre_facet |
Arctic Arctic Sea ice Svalbard |
op_source |
EPIC3International Glaciology Society - International Symposium on Seasonal Snow and Ice, Lahti, Finland, 2012-05-28-2012-06-01 |
op_relation |
Nomura, D. , Granskog, M. , Assmy, P. , Nehrke, G. orcid:0000-0002-2851-3049 , Hu, Y. , Fischer, M. and Dieckmann, G. (2012) Characterization of ikaite (CaCO3*6H2O) crystals in first-year Arctic sea ice north of Svalbard: Crystal size and melted-ice total alkalinity , International Glaciology Society - International Symposium on Seasonal Snow and Ice, Lahti, Finland, 28 May 2012 - 1 June 2012 . hdl:10013/epic.39388 |
_version_ |
1766301344507887616 |