Monitoring water accumulation in a glacier using magnetic resonance imaging
Tête Rousse is a small polythermal glacier located in the Mont Blanc area (French Alps) at an altitude of 3100 to 3300 m. In 1892, an outburst flood from this glacier released about 200 000 m3 of water mixed with ice, causing much damage. A new accumulation of melt water in the glacier was not exclu...
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Copernicus Publications
2014
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Online Access: | https://doi.org/10.5194/tc-8-155-2014 http://www.the-cryosphere.net/8/155/2014/tc-8-155-2014.pdf https://doaj.org/article/7eec85dc8cb14e8a9aaa1ca7de3f660f |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:7eec85dc8cb14e8a9aaa1ca7de3f660f 2023-05-15T18:32:22+02:00 Monitoring water accumulation in a glacier using magnetic resonance imaging A. Legchenko C. Vincent J. M. Baltassat J. F. Girard E. Thibert O. Gagliardini M. Descloitres A. Gilbert S. Garambois A. Chevalier H. Guyard 2014-01-01 https://doi.org/10.5194/tc-8-155-2014 http://www.the-cryosphere.net/8/155/2014/tc-8-155-2014.pdf https://doaj.org/article/7eec85dc8cb14e8a9aaa1ca7de3f660f en eng Copernicus Publications 1994-0416 1994-0424 doi:10.5194/tc-8-155-2014 http://www.the-cryosphere.net/8/155/2014/tc-8-155-2014.pdf https://doaj.org/article/7eec85dc8cb14e8a9aaa1ca7de3f660f undefined The Cryosphere, Vol 8, Iss 1, Pp 155-166 (2014) geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2014 fttriple https://doi.org/10.5194/tc-8-155-2014 2023-01-22T19:25:42Z Tête Rousse is a small polythermal glacier located in the Mont Blanc area (French Alps) at an altitude of 3100 to 3300 m. In 1892, an outburst flood from this glacier released about 200 000 m3 of water mixed with ice, causing much damage. A new accumulation of melt water in the glacier was not excluded. The uncertainty related to such glacier conditions initiated an extensive geophysical study for evaluating the hazard. Using three-dimensional surface nuclear magnetic resonance imaging (3-D-SNMR), we showed that the temperate part of the Tête Rousse glacier contains two separate water-filled caverns (central and upper caverns). In 2009, the central cavern contained about 55 000 m3 of water. Since 2010, the cavern is drained every year. We monitored the changes caused by this pumping in the water distribution within the glacier body. Twice a year, we carried out magnetic resonance imaging of the entire glacier and estimated the volume of water accumulated in the central cavern. Our results show changes in cavern geometry and recharge rate: in two years, the central cavern lost about 73% of its initial volume, but 65% was lost in one year after the first pumping. We also observed that, after being drained, the cavern was recharged at an average rate of 20 to 25 m3 d−1 during the winter months and 120 to 180 m3 d−1 in summer. These observations illustrate how ice, water and air may refill englacial volume being emptied by artificial draining. Comparison of the 3-D-SNMR results with those obtained by drilling and pumping showed a very good correspondence, confirming the high reliability of 3-D-SNMR imaging. Article in Journal/Newspaper The Cryosphere Unknown Mont Blanc ENVELOPE(69.468,69.468,-49.461,-49.461) The Cryosphere 8 1 155 166 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
geo envir |
spellingShingle |
geo envir A. Legchenko C. Vincent J. M. Baltassat J. F. Girard E. Thibert O. Gagliardini M. Descloitres A. Gilbert S. Garambois A. Chevalier H. Guyard Monitoring water accumulation in a glacier using magnetic resonance imaging |
topic_facet |
geo envir |
description |
Tête Rousse is a small polythermal glacier located in the Mont Blanc area (French Alps) at an altitude of 3100 to 3300 m. In 1892, an outburst flood from this glacier released about 200 000 m3 of water mixed with ice, causing much damage. A new accumulation of melt water in the glacier was not excluded. The uncertainty related to such glacier conditions initiated an extensive geophysical study for evaluating the hazard. Using three-dimensional surface nuclear magnetic resonance imaging (3-D-SNMR), we showed that the temperate part of the Tête Rousse glacier contains two separate water-filled caverns (central and upper caverns). In 2009, the central cavern contained about 55 000 m3 of water. Since 2010, the cavern is drained every year. We monitored the changes caused by this pumping in the water distribution within the glacier body. Twice a year, we carried out magnetic resonance imaging of the entire glacier and estimated the volume of water accumulated in the central cavern. Our results show changes in cavern geometry and recharge rate: in two years, the central cavern lost about 73% of its initial volume, but 65% was lost in one year after the first pumping. We also observed that, after being drained, the cavern was recharged at an average rate of 20 to 25 m3 d−1 during the winter months and 120 to 180 m3 d−1 in summer. These observations illustrate how ice, water and air may refill englacial volume being emptied by artificial draining. Comparison of the 3-D-SNMR results with those obtained by drilling and pumping showed a very good correspondence, confirming the high reliability of 3-D-SNMR imaging. |
format |
Article in Journal/Newspaper |
author |
A. Legchenko C. Vincent J. M. Baltassat J. F. Girard E. Thibert O. Gagliardini M. Descloitres A. Gilbert S. Garambois A. Chevalier H. Guyard |
author_facet |
A. Legchenko C. Vincent J. M. Baltassat J. F. Girard E. Thibert O. Gagliardini M. Descloitres A. Gilbert S. Garambois A. Chevalier H. Guyard |
author_sort |
A. Legchenko |
title |
Monitoring water accumulation in a glacier using magnetic resonance imaging |
title_short |
Monitoring water accumulation in a glacier using magnetic resonance imaging |
title_full |
Monitoring water accumulation in a glacier using magnetic resonance imaging |
title_fullStr |
Monitoring water accumulation in a glacier using magnetic resonance imaging |
title_full_unstemmed |
Monitoring water accumulation in a glacier using magnetic resonance imaging |
title_sort |
monitoring water accumulation in a glacier using magnetic resonance imaging |
publisher |
Copernicus Publications |
publishDate |
2014 |
url |
https://doi.org/10.5194/tc-8-155-2014 http://www.the-cryosphere.net/8/155/2014/tc-8-155-2014.pdf https://doaj.org/article/7eec85dc8cb14e8a9aaa1ca7de3f660f |
long_lat |
ENVELOPE(69.468,69.468,-49.461,-49.461) |
geographic |
Mont Blanc |
geographic_facet |
Mont Blanc |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
The Cryosphere, Vol 8, Iss 1, Pp 155-166 (2014) |
op_relation |
1994-0416 1994-0424 doi:10.5194/tc-8-155-2014 http://www.the-cryosphere.net/8/155/2014/tc-8-155-2014.pdf https://doaj.org/article/7eec85dc8cb14e8a9aaa1ca7de3f660f |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/tc-8-155-2014 |
container_title |
The Cryosphere |
container_volume |
8 |
container_issue |
1 |
container_start_page |
155 |
op_container_end_page |
166 |
_version_ |
1766216478695096320 |