Evidence of intrapermafrost groundwater flow beneath an active rock glacier in the Swiss Alps
Temperature measurements in borehole 2/1987 through rock glacier Murtèl Corvatsch revealed a very high mean heat flow of 150 mW/m2. Between 52 m and 56 m depth, seasonal variations are observed; above and underneath this zone temperatures have remained negative during the last 4 years. In addition,...
Published in: | Permafrost and Periglacial Processes |
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Online Access: | https://doi.org/10.1002/ppp.3430030216 |
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ftrepec:oai:RePEc:wly:perpro:v:3:y:1992:i:2:p:169-173 2023-05-15T17:58:09+02:00 Evidence of intrapermafrost groundwater flow beneath an active rock glacier in the Swiss Alps Daniel S. Vonder Mühll https://doi.org/10.1002/ppp.3430030216 unknown https://doi.org/10.1002/ppp.3430030216 article ftrepec https://doi.org/10.1002/ppp.3430030216 2020-12-04T13:31:03Z Temperature measurements in borehole 2/1987 through rock glacier Murtèl Corvatsch revealed a very high mean heat flow of 150 mW/m2. Between 52 m and 56 m depth, seasonal variations are observed; above and underneath this zone temperatures have remained negative during the last 4 years. In addition, a zero curtain effect at the same depth hints at the existence of a water aquifer which is active mainly in summer. This phenomenon is interpreted as a talik at about 55 m depth. The permafrost may have a total thickness of approximately 100 m. The high heat flow is a result of the boundary conditions at the surface (mean annual temperature: −3 °C) and at the aquifer (at a depth of about 50 m), where the temperature is close to 0 °C. Les mesures de température dans les trous de forage dans le glacier rocheux Murtèl‐Corvatsch présentent une tres grande valeur moyenne pour le flux de chaleur (150 m W/m2). Entre 52 m et 56 m de profondeur, il y a des variations saisonnières de température; au dessus et en dessous les températures étaient toujours negatives durant les quatres années passées. Dans cette zone un effet de ‘zero curtain’ a pu ětre observé, indiquant un aquifère d'eau actif en été. Le phénomène est interpreté comme un talik à une profondeur d'environ 55 m, entouré de pergélisol, qui peut atteindre une profondeur de 100 m. La grande valeur de flux de chaleur est due aux conditions à la surface (température moyenne de −3 °C) et à l'aquifère (situé à environ 50 m de profondeur) où la température est proche de 0 °C. Article in Journal/Newspaper permafrost pergélisol RePEc (Research Papers in Economics) Talik ENVELOPE(146.601,146.601,59.667,59.667) Permafrost and Periglacial Processes 3 2 169 173 |
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Open Polar |
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RePEc (Research Papers in Economics) |
op_collection_id |
ftrepec |
language |
unknown |
description |
Temperature measurements in borehole 2/1987 through rock glacier Murtèl Corvatsch revealed a very high mean heat flow of 150 mW/m2. Between 52 m and 56 m depth, seasonal variations are observed; above and underneath this zone temperatures have remained negative during the last 4 years. In addition, a zero curtain effect at the same depth hints at the existence of a water aquifer which is active mainly in summer. This phenomenon is interpreted as a talik at about 55 m depth. The permafrost may have a total thickness of approximately 100 m. The high heat flow is a result of the boundary conditions at the surface (mean annual temperature: −3 °C) and at the aquifer (at a depth of about 50 m), where the temperature is close to 0 °C. Les mesures de température dans les trous de forage dans le glacier rocheux Murtèl‐Corvatsch présentent une tres grande valeur moyenne pour le flux de chaleur (150 m W/m2). Entre 52 m et 56 m de profondeur, il y a des variations saisonnières de température; au dessus et en dessous les températures étaient toujours negatives durant les quatres années passées. Dans cette zone un effet de ‘zero curtain’ a pu ětre observé, indiquant un aquifère d'eau actif en été. Le phénomène est interpreté comme un talik à une profondeur d'environ 55 m, entouré de pergélisol, qui peut atteindre une profondeur de 100 m. La grande valeur de flux de chaleur est due aux conditions à la surface (température moyenne de −3 °C) et à l'aquifère (situé à environ 50 m de profondeur) où la température est proche de 0 °C. |
format |
Article in Journal/Newspaper |
author |
Daniel S. Vonder Mühll |
spellingShingle |
Daniel S. Vonder Mühll Evidence of intrapermafrost groundwater flow beneath an active rock glacier in the Swiss Alps |
author_facet |
Daniel S. Vonder Mühll |
author_sort |
Daniel S. Vonder Mühll |
title |
Evidence of intrapermafrost groundwater flow beneath an active rock glacier in the Swiss Alps |
title_short |
Evidence of intrapermafrost groundwater flow beneath an active rock glacier in the Swiss Alps |
title_full |
Evidence of intrapermafrost groundwater flow beneath an active rock glacier in the Swiss Alps |
title_fullStr |
Evidence of intrapermafrost groundwater flow beneath an active rock glacier in the Swiss Alps |
title_full_unstemmed |
Evidence of intrapermafrost groundwater flow beneath an active rock glacier in the Swiss Alps |
title_sort |
evidence of intrapermafrost groundwater flow beneath an active rock glacier in the swiss alps |
url |
https://doi.org/10.1002/ppp.3430030216 |
long_lat |
ENVELOPE(146.601,146.601,59.667,59.667) |
geographic |
Talik |
geographic_facet |
Talik |
genre |
permafrost pergélisol |
genre_facet |
permafrost pergélisol |
op_relation |
https://doi.org/10.1002/ppp.3430030216 |
op_doi |
https://doi.org/10.1002/ppp.3430030216 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
3 |
container_issue |
2 |
container_start_page |
169 |
op_container_end_page |
173 |
_version_ |
1766166702197833728 |