Cardyn, Raphaelle; Clark, Ian D; Lacelle, Denis; Lauriol, Bernard; Zdanowicz, Christian; Calmels, Fabrice (2007): Molar gas ratios and stable oxygen and nitrogen isotopes of air entrapped in ice, North America [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.808160, Supplement to: Cardyn, R et al. (2007): Molar gas ratios of air entrapped in ice: A new tool to determine the origin of relict massive ground ice bodies in permafrost. Quaternary Research, 68(2), 239-248, https://doi.org/10.1016/j.yqres.2007.05.003
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Abstract:
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.
Project(s):
Coverage:
Median Latitude: 69.071278 * Median Longitude: -91.803056 * South-bound Latitude: 56.550000 * West-bound Longitude: -140.900000 * North-bound Latitude: 80.666670 * East-bound Longitude: -72.650000
Comment:
Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Cardyn, R; Clark, ID; Lacelle, D et al. (2007): (Table S2) Molar gas ratios and stable oxygen and nitrogen gas isotopes of air entrapped in glacier ice, North America. https://doi.org/10.1594/PANGAEA.808159
- Cardyn, R; Clark, ID; Lacelle, D et al. (2007): (Table S1) Molar gas ratios and stable oxygen and nitrogen gas isotopes of air entrapped in glacier ice, Nunavut Territory. https://doi.org/10.1594/PANGAEA.808158