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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International Glaciological Society
1985
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ftunivbern:oai:boris.unibe.ch:158754 2023-08-20T03:59:48+02:00 Enclosure of air during metamorphosis of dry firn to ice Stauffer, B. Schwander, J. Oeschger, H. 1985 application/pdf https://boris.unibe.ch/158754/1/stauffer85ag_b.pdf https://boris.unibe.ch/158754/ eng eng International Glaciological Society https://boris.unibe.ch/158754/ info:eu-repo/semantics/restrictedAccess Stauffer, B.; Schwander, J.; Oeschger, H. (1985). Enclosure of air during metamorphosis of dry firn to ice. Annals of glaciology, 6, pp. 108-112. International Glaciological Society 10.3189/1985AoG6-1-108-112 <http://dx.doi.org/10.3189/1985AoG6-1-108-112> 530 Physics info:eu-repo/semantics/conferenceObject info:eu-repo/semantics/publishedVersion PeerReviewed 1985 ftunivbern https://doi.org/10.3189/1985AoG6-1-108-112 2023-07-31T22:08:19Z 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. Conference Object Annals of Glaciology Greenland South pole BORIS (Bern Open Repository and Information System, University of Bern) Greenland South Pole Annals of Glaciology 6 108 112 |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
530 Physics |
spellingShingle |
530 Physics Stauffer, B. Schwander, J. Oeschger, H. Enclosure of air during metamorphosis of dry firn to ice |
topic_facet |
530 Physics |
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 |
Conference Object |
author |
Stauffer, B. Schwander, J. Oeschger, H. |
author_facet |
Stauffer, B. Schwander, J. Oeschger, H. |
author_sort |
Stauffer, B. |
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 |
International Glaciological Society |
publishDate |
1985 |
url |
https://boris.unibe.ch/158754/1/stauffer85ag_b.pdf https://boris.unibe.ch/158754/ |
geographic |
Greenland South Pole |
geographic_facet |
Greenland South Pole |
genre |
Annals of Glaciology Greenland South pole |
genre_facet |
Annals of Glaciology Greenland South pole |
op_source |
Stauffer, B.; Schwander, J.; Oeschger, H. (1985). Enclosure of air during metamorphosis of dry firn to ice. Annals of glaciology, 6, pp. 108-112. International Glaciological Society 10.3189/1985AoG6-1-108-112 <http://dx.doi.org/10.3189/1985AoG6-1-108-112> |
op_relation |
https://boris.unibe.ch/158754/ |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.3189/1985AoG6-1-108-112 |
container_title |
Annals of Glaciology |
container_volume |
6 |
container_start_page |
108 |
op_container_end_page |
112 |
_version_ |
1774715738507968512 |