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| Main Authors: | , , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
2007
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| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.808160 |
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| _version_ | 1867172222894866432 |
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| author | Cardyn, Raphaelle Clark, Ian D Lacelle, Denis Lauriol, Bernard Zdanowicz, Christian Calmels, Fabrice |
| author_facet | Cardyn, Raphaelle Clark, Ian D Lacelle, Denis Lauriol, Bernard Zdanowicz, Christian Calmels, Fabrice |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The molar ratios of atmospheric gases change during dissolution in water due to differences in their relative solubilities. We exploited this characteristic to develop a tool to clarify the origin of ice formations in permafrost regions. Extracted from ice, molar gas ratios can distinguish buried glacier ice from intrasedimental ground ice formed by freezing groundwaters. An extraction line was built to isolate gases from ice by melting and trapping with liquid He, followed by analysis of N2, O2, Ar, 18O-O2 and 15N-N2, by continuous flow mass spectrometry. The method was tested using glacier ice, aufeis ice (river icing) and intrasedimental ground ice from sites in the Canadian Arctic. O2/Ar and N2/Ar ratios clearly distinguish between atmospheric gas in glacial ice and gases from intrasedimental ground ice, which are exsolved from freezing water. 615NN2 and 618OO2 in glacier ice, aufeis ice and intrasedimental ground ice do not show clear distinguishing trends as they are affected by various physical processes during formation such as gravitational settling, excess air addition, mixing with snow pack, and respiration. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_808160 |
| institution | PANGAEA |
| language | en |
| publishDate | 2007 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Molar gas ratios and stable oxygen and nitrogen isotopes of air entrapped in ice, North America Cardyn, Raphaelle Clark, Ian D Lacelle, Denis Lauriol, Bernard Zdanowicz, Christian Calmels, Fabrice International Polar Year (2007-2008); IPY The molar ratios of atmospheric gases change during dissolution in water due to differences in their relative solubilities. We exploited this characteristic to develop a tool to clarify the origin of ice formations in permafrost regions. Extracted from ice, molar gas ratios can distinguish buried glacier ice from intrasedimental ground ice formed by freezing groundwaters. An extraction line was built to isolate gases from ice by melting and trapping with liquid He, followed by analysis of N2, O2, Ar, 18O-O2 and 15N-N2, by continuous flow mass spectrometry. The method was tested using glacier ice, aufeis ice (river icing) and intrasedimental ground ice from sites in the Canadian Arctic. O2/Ar and N2/Ar ratios clearly distinguish between atmospheric gas in glacial ice and gases from intrasedimental ground ice, which are exsolved from freezing water. 615NN2 and 618OO2 in glacier ice, aufeis ice and intrasedimental ground ice do not show clear distinguishing trends as they are affected by various physical processes during formation such as gravitational settling, excess air addition, mixing with snow pack, and respiration. |
| title | Molar gas ratios and stable oxygen and nitrogen isotopes of air entrapped in ice, North America |
| topic | International Polar Year (2007-2008); IPY |
| url | https://doi.org/10.1594/PANGAEA.808160 |