Enclosure of air during metamorphosis of dry firn to ice ...
If cold firn has reached a density of about 0.55 Mg m-3, further densificaron occurs by a sintering process which increases the contact surface between the firn grains. The pore volume is decreasing continuously but the firn remains permeable to air up to a density of 0.82 Mg m-3. At about this dens...
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University of Bern
1985
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Online Access: | https://dx.doi.org/10.48350/158754 https://boris-portal.unibe.ch/handle/20.500.12422/43365 |
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ftdatacite:10.48350/158754 2024-10-20T14:09:09+00:00 Enclosure of air during metamorphosis of dry firn to ice ... Stauffer, Bernhard Schwander, Jakob Oeschger, H. 1985 https://dx.doi.org/10.48350/158754 https://boris-portal.unibe.ch/handle/20.500.12422/43365 en eng University of Bern Text ConferencePaper Article 1985 ftdatacite https://doi.org/10.48350/158754 2024-10-01T11:43:07Z If cold firn has reached a density of about 0.55 Mg m-3, further densificaron occurs by a sintering process which increases the contact surface between the firn grains. The pore volume is decreasing continuously but the firn remains permeable to air up to a density of 0.82 Mg m-3. At about this density the remaining air in the pore volume is closed off in isolated bubbles. We are interested in the age and the age distribution of the air enclosed in bubbles relative to the age of the surrounding ice, and are investigating the development of the pore volume in firn. A newly constructed measuring device allows the field measurement of the amount of air which is already enclosed in bubbles of firn samples. Measurements have been made during summer 1983 in Greenland and during winter 1983/84 at the South Pole. The results are discussed and compared with results obtained with a simplified statistical sintering model, using some results of percolation theory. ... Article in Journal/Newspaper Greenland South pole DataCite Greenland South Pole |
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ftdatacite |
language |
English |
description |
If cold firn has reached a density of about 0.55 Mg m-3, further densificaron occurs by a sintering process which increases the contact surface between the firn grains. The pore volume is decreasing continuously but the firn remains permeable to air up to a density of 0.82 Mg m-3. At about this density the remaining air in the pore volume is closed off in isolated bubbles. We are interested in the age and the age distribution of the air enclosed in bubbles relative to the age of the surrounding ice, and are investigating the development of the pore volume in firn. A newly constructed measuring device allows the field measurement of the amount of air which is already enclosed in bubbles of firn samples. Measurements have been made during summer 1983 in Greenland and during winter 1983/84 at the South Pole. The results are discussed and compared with results obtained with a simplified statistical sintering model, using some results of percolation theory. ... |
format |
Article in Journal/Newspaper |
author |
Stauffer, Bernhard Schwander, Jakob Oeschger, H. |
spellingShingle |
Stauffer, Bernhard Schwander, Jakob Oeschger, H. Enclosure of air during metamorphosis of dry firn to ice ... |
author_facet |
Stauffer, Bernhard Schwander, Jakob Oeschger, H. |
author_sort |
Stauffer, Bernhard |
title |
Enclosure of air during metamorphosis of dry firn to ice ... |
title_short |
Enclosure of air during metamorphosis of dry firn to ice ... |
title_full |
Enclosure of air during metamorphosis of dry firn to ice ... |
title_fullStr |
Enclosure of air during metamorphosis of dry firn to ice ... |
title_full_unstemmed |
Enclosure of air during metamorphosis of dry firn to ice ... |
title_sort |
enclosure of air during metamorphosis of dry firn to ice ... |
publisher |
University of Bern |
publishDate |
1985 |
url |
https://dx.doi.org/10.48350/158754 https://boris-portal.unibe.ch/handle/20.500.12422/43365 |
geographic |
Greenland South Pole |
geographic_facet |
Greenland South Pole |
genre |
Greenland South pole |
genre_facet |
Greenland South pole |
op_doi |
https://doi.org/10.48350/158754 |
_version_ |
1813448594355650560 |