Change in CO2 concentration and O2/N2 ratio in ice cores due to molecular diffusion ...
Polar ice cores are unique archives for ancient air. However, a loss of air due to molecular diffusion during storage could affect the composition of the remaining air. We formulate a model with a high spatial resolution (1 mm) calculating the loss of N2, O2 and CO2 in pure clathrate ice in order to...
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American Geophysical Union
2009
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Online Access: | https://dx.doi.org/10.48350/37491 https://boris.unibe.ch/37491/ |
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ftdatacite:10.48350/37491 2024-09-15T18:11:53+00:00 Change in CO2 concentration and O2/N2 ratio in ice cores due to molecular diffusion ... Bereiter, Bernhard Schwander, J. Lüthi, D. Stocker, Thomas F. 2009 https://dx.doi.org/10.48350/37491 https://boris.unibe.ch/37491/ unknown American Geophysical Union https://dx.doi.org/10.1029/2008GL036737 open access publisher holds copyright http://purl.org/coar/access_right/c_abf2 Text ScholarlyArticle article-journal journal article 2009 ftdatacite https://doi.org/10.48350/3749110.1029/2008GL036737 2024-09-02T10:17:31Z Polar ice cores are unique archives for ancient air. However, a loss of air due to molecular diffusion during storage could affect the composition of the remaining air. We formulate a model with a high spatial resolution (1 mm) calculating the loss of N2, O2 and CO2 in pure clathrate ice in order to determine which layers of an ice core are affected by significant changes in the CO2 concentration and the δ(O2/N2) ratio for storage durations up to 38 years. The results agree with experimental δ(O2/N2) measurements at ice core pieces performed after different storage durations. Additionally, the calculations confirm the importance of the storage temperature and show that the CO2 concentration is less affected than that of δ(O2/N2). Furthermore, guidelines for ice core sample preparation are provided in dependence of storage duration and temperature. ... Text ice core DataCite |
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description |
Polar ice cores are unique archives for ancient air. However, a loss of air due to molecular diffusion during storage could affect the composition of the remaining air. We formulate a model with a high spatial resolution (1 mm) calculating the loss of N2, O2 and CO2 in pure clathrate ice in order to determine which layers of an ice core are affected by significant changes in the CO2 concentration and the δ(O2/N2) ratio for storage durations up to 38 years. The results agree with experimental δ(O2/N2) measurements at ice core pieces performed after different storage durations. Additionally, the calculations confirm the importance of the storage temperature and show that the CO2 concentration is less affected than that of δ(O2/N2). Furthermore, guidelines for ice core sample preparation are provided in dependence of storage duration and temperature. ... |
format |
Text |
author |
Bereiter, Bernhard Schwander, J. Lüthi, D. Stocker, Thomas F. |
spellingShingle |
Bereiter, Bernhard Schwander, J. Lüthi, D. Stocker, Thomas F. Change in CO2 concentration and O2/N2 ratio in ice cores due to molecular diffusion ... |
author_facet |
Bereiter, Bernhard Schwander, J. Lüthi, D. Stocker, Thomas F. |
author_sort |
Bereiter, Bernhard |
title |
Change in CO2 concentration and O2/N2 ratio in ice cores due to molecular diffusion ... |
title_short |
Change in CO2 concentration and O2/N2 ratio in ice cores due to molecular diffusion ... |
title_full |
Change in CO2 concentration and O2/N2 ratio in ice cores due to molecular diffusion ... |
title_fullStr |
Change in CO2 concentration and O2/N2 ratio in ice cores due to molecular diffusion ... |
title_full_unstemmed |
Change in CO2 concentration and O2/N2 ratio in ice cores due to molecular diffusion ... |
title_sort |
change in co2 concentration and o2/n2 ratio in ice cores due to molecular diffusion ... |
publisher |
American Geophysical Union |
publishDate |
2009 |
url |
https://dx.doi.org/10.48350/37491 https://boris.unibe.ch/37491/ |
genre |
ice core |
genre_facet |
ice core |
op_relation |
https://dx.doi.org/10.1029/2008GL036737 |
op_rights |
open access publisher holds copyright http://purl.org/coar/access_right/c_abf2 |
op_doi |
https://doi.org/10.48350/3749110.1029/2008GL036737 |
_version_ |
1810449450273865728 |