Characterization of ikaite (CaCO3·6H2O) crystals in first-year Arctic sea ice north of Svalbard
We identified ikaite crystals (CaCO3 ·6H2O) and examined their shape and size distribution in first-year Arctic pack ice, overlying snow and slush layers during the spring melt onset north of Svalbard. Additional measurements of total alkalinity (TA) were made for melted snow and sea-ice samples. Ik...
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fthokunivhus:oai:eprints.lib.hokudai.ac.jp:2115/70584 2023-05-15T13:29:12+02:00 Characterization of ikaite (CaCO3·6H2O) crystals in first-year Arctic sea ice north of Svalbard Nomura, Daiki Assmy, Philipp Nehrke, Gernot Granskog, Mats A. Fischer, Michael Dieckmann, Gerhard S. Fransson, Agneta Hu, Yubin Schnetger, Bernhard http://hdl.handle.net/2115/70584 https://doi.org/10.3189/2013AoG62A034 eng eng Cambridge University Press http://www.igsoc.org/ http://hdl.handle.net/2115/70584 Annals of Glaciology, 54(62): 125-131 http://dx.doi.org/10.3189/2013AoG62A034 © 2013 International Glaciological Society https://creativecommons.org/licenses/by/4.0/ CC-BY 660 article fthokunivhus https://doi.org/10.3189/2013AoG62A034 2022-11-18T01:04:56Z We identified ikaite crystals (CaCO3 ·6H2O) and examined their shape and size distribution in first-year Arctic pack ice, overlying snow and slush layers during the spring melt onset north of Svalbard. Additional measurements of total alkalinity (TA) were made for melted snow and sea-ice samples. Ikaite crystals were mainly found in the bottom of the snowpack, in slush and the surface layers of the sea ice where the temperature was generally lower and salinity higher than in the ice below. Image analysis showed that ikaite crystals were characterized by a roughly elliptical shape and a maximum caliper diameter of 201.0±115.9 μm (n = 918). Since the ice-melting season had already started, ikaite crystals may already have begun to dissolve, which might explain the lack of a relationship between ikaite crystal size and sea-ice parameters (temperature, salinity, and thickness of snow and ice). Comparisons of salinity and TA profiles for melted ice samples suggest that the precipitation/dissolution of ikaite crystals occurred at the top of the sea ice and the bottom of the snowpack during ice formation/melting processes. Article in Journal/Newspaper Annals of Glaciology Arctic Sea ice Svalbard Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) Arctic Svalbard Annals of Glaciology 54 62 125 131 |
institution |
Open Polar |
collection |
Hokkaido University Collection of Scholarly and Academic Papers (HUSCAP) |
op_collection_id |
fthokunivhus |
language |
English |
topic |
660 |
spellingShingle |
660 Nomura, Daiki Assmy, Philipp Nehrke, Gernot Granskog, Mats A. Fischer, Michael Dieckmann, Gerhard S. Fransson, Agneta Hu, Yubin Schnetger, Bernhard Characterization of ikaite (CaCO3·6H2O) crystals in first-year Arctic sea ice north of Svalbard |
topic_facet |
660 |
description |
We identified ikaite crystals (CaCO3 ·6H2O) and examined their shape and size distribution in first-year Arctic pack ice, overlying snow and slush layers during the spring melt onset north of Svalbard. Additional measurements of total alkalinity (TA) were made for melted snow and sea-ice samples. Ikaite crystals were mainly found in the bottom of the snowpack, in slush and the surface layers of the sea ice where the temperature was generally lower and salinity higher than in the ice below. Image analysis showed that ikaite crystals were characterized by a roughly elliptical shape and a maximum caliper diameter of 201.0±115.9 μm (n = 918). Since the ice-melting season had already started, ikaite crystals may already have begun to dissolve, which might explain the lack of a relationship between ikaite crystal size and sea-ice parameters (temperature, salinity, and thickness of snow and ice). Comparisons of salinity and TA profiles for melted ice samples suggest that the precipitation/dissolution of ikaite crystals occurred at the top of the sea ice and the bottom of the snowpack during ice formation/melting processes. |
format |
Article in Journal/Newspaper |
author |
Nomura, Daiki Assmy, Philipp Nehrke, Gernot Granskog, Mats A. Fischer, Michael Dieckmann, Gerhard S. Fransson, Agneta Hu, Yubin Schnetger, Bernhard |
author_facet |
Nomura, Daiki Assmy, Philipp Nehrke, Gernot Granskog, Mats A. Fischer, Michael Dieckmann, Gerhard S. Fransson, Agneta Hu, Yubin Schnetger, Bernhard |
author_sort |
Nomura, Daiki |
title |
Characterization of ikaite (CaCO3·6H2O) crystals in first-year Arctic sea ice north of Svalbard |
title_short |
Characterization of ikaite (CaCO3·6H2O) crystals in first-year Arctic sea ice north of Svalbard |
title_full |
Characterization of ikaite (CaCO3·6H2O) crystals in first-year Arctic sea ice north of Svalbard |
title_fullStr |
Characterization of ikaite (CaCO3·6H2O) crystals in first-year Arctic sea ice north of Svalbard |
title_full_unstemmed |
Characterization of ikaite (CaCO3·6H2O) crystals in first-year Arctic sea ice north of Svalbard |
title_sort |
characterization of ikaite (caco3·6h2o) crystals in first-year arctic sea ice north of svalbard |
publisher |
Cambridge University Press |
url |
http://hdl.handle.net/2115/70584 https://doi.org/10.3189/2013AoG62A034 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Annals of Glaciology Arctic Sea ice Svalbard |
genre_facet |
Annals of Glaciology Arctic Sea ice Svalbard |
op_relation |
http://www.igsoc.org/ http://hdl.handle.net/2115/70584 Annals of Glaciology, 54(62): 125-131 http://dx.doi.org/10.3189/2013AoG62A034 |
op_rights |
© 2013 International Glaciological Society https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3189/2013AoG62A034 |
container_title |
Annals of Glaciology |
container_volume |
54 |
container_issue |
62 |
container_start_page |
125 |
op_container_end_page |
131 |
_version_ |
1765999237611388928 |