Analysis of gases in ice from regions of northern Canada
Gas bubbles in ice hold relevance to the origin and process of formation, distinguishing between an atmospheric or dissolved origin. An extraction line was built to isolate gases from ice, and tested using glacial, aufeis and ground ice from the Canadian Arctic. A newly developed mass spectrometry t...
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ftunivottawa:oai:ruor.uottawa.ca:10393/26863 2023-05-15T15:05:06+02:00 Analysis of gases in ice from regions of northern Canada Cardyn, Raphaelle 2005 78 p. application/pdf http://hdl.handle.net/10393/26863 https://doi.org/10.20381/ruor-9067 en eng University of Ottawa (Canada) Source: Masters Abstracts International, Volume: 44-04, page: 1780. http://hdl.handle.net/10393/26863 http://dx.doi.org/10.20381/ruor-9067 Geology Geophysics Thesis 2005 ftunivottawa https://doi.org/10.20381/ruor-9067 2021-01-04T17:08:53Z Gas bubbles in ice hold relevance to the origin and process of formation, distinguishing between an atmospheric or dissolved origin. An extraction line was built to isolate gases from ice, and tested using glacial, aufeis and ground ice from the Canadian Arctic. A newly developed mass spectrometry technique was used to analyze the gases for gas ratios of three principal atmospheric gases (N2, O2, and Ar) as well as 18O and 15N of these gases. O2/Ar and N2/Ar ratios demonstrate differences between atmospheric gas in glacial ice and gases exsolved from freezing water, due to the difference in their relative solubilites. Glacial and ground ice contained higher oxygen-18 values than the atmosphere and aufeis ice. Results for glacier ice show that isotopic and gas ratios of atmospheric gas entrapped during glacial ice formation change through gravitational settling. Aufeis ice bubbles originate as dissolved gas with alteration by excess air addition and/or mixing with snow pack. In the ground ice sampled, low oxygen concentrations and high delta 18O values, indicate respiration prior to formation. Thesis Arctic glacier* uO Research (University of Ottawa - uOttawa) Arctic Canada |
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Open Polar |
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uO Research (University of Ottawa - uOttawa) |
op_collection_id |
ftunivottawa |
language |
English |
topic |
Geology Geophysics |
spellingShingle |
Geology Geophysics Cardyn, Raphaelle Analysis of gases in ice from regions of northern Canada |
topic_facet |
Geology Geophysics |
description |
Gas bubbles in ice hold relevance to the origin and process of formation, distinguishing between an atmospheric or dissolved origin. An extraction line was built to isolate gases from ice, and tested using glacial, aufeis and ground ice from the Canadian Arctic. A newly developed mass spectrometry technique was used to analyze the gases for gas ratios of three principal atmospheric gases (N2, O2, and Ar) as well as 18O and 15N of these gases. O2/Ar and N2/Ar ratios demonstrate differences between atmospheric gas in glacial ice and gases exsolved from freezing water, due to the difference in their relative solubilites. Glacial and ground ice contained higher oxygen-18 values than the atmosphere and aufeis ice. Results for glacier ice show that isotopic and gas ratios of atmospheric gas entrapped during glacial ice formation change through gravitational settling. Aufeis ice bubbles originate as dissolved gas with alteration by excess air addition and/or mixing with snow pack. In the ground ice sampled, low oxygen concentrations and high delta 18O values, indicate respiration prior to formation. |
format |
Thesis |
author |
Cardyn, Raphaelle |
author_facet |
Cardyn, Raphaelle |
author_sort |
Cardyn, Raphaelle |
title |
Analysis of gases in ice from regions of northern Canada |
title_short |
Analysis of gases in ice from regions of northern Canada |
title_full |
Analysis of gases in ice from regions of northern Canada |
title_fullStr |
Analysis of gases in ice from regions of northern Canada |
title_full_unstemmed |
Analysis of gases in ice from regions of northern Canada |
title_sort |
analysis of gases in ice from regions of northern canada |
publisher |
University of Ottawa (Canada) |
publishDate |
2005 |
url |
http://hdl.handle.net/10393/26863 https://doi.org/10.20381/ruor-9067 |
geographic |
Arctic Canada |
geographic_facet |
Arctic Canada |
genre |
Arctic glacier* |
genre_facet |
Arctic glacier* |
op_relation |
Source: Masters Abstracts International, Volume: 44-04, page: 1780. http://hdl.handle.net/10393/26863 http://dx.doi.org/10.20381/ruor-9067 |
op_doi |
https://doi.org/10.20381/ruor-9067 |
_version_ |
1766336857754304512 |