Permafrost distribution along the Rocky Mountains in Alberta
Twenty-eight drill holes ranging from 15 to 150 m in depth have been instrumented with strings of thermistors and thermocouples at six study sites between Plateau Mountain and Jasper, south-west Alberta. Measurements are made every four weeks and indicate that the lower limit of continuous permafros...
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1982
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ftnrccanada:oai:cisti-icist.nrc-cnrc.ca:cistinparc:20375844 2024-09-15T18:11:33+00:00 Permafrost distribution along the Rocky Mountains in Alberta Harris, S. A. Brown, R. J. E. 1982 text https://nrc-publications.canada.ca/eng/view/ft/?id=9aec46be-b7f6-4bc2-b1c2-79fce285dae8 https://nrc-publications.canada.ca/eng/view/object/?id=9aec46be-b7f6-4bc2-b1c2-79fce285dae8 https://nrc-publications.canada.ca/fra/voir/objet/?id=9aec46be-b7f6-4bc2-b1c2-79fce285dae8 eng eng Roger J.E. Brown Memorial Volume. Proceedings Fourth Canadian Permafrost Conference, Fourth Canadian Permafrost Conference, March 2, 1981, Calgary, Alberta, Canada, Publication date: 1982, Pages: 59–67 report_number:DBR-P-1074 permafrost pergélisol soils sol (terre) altitude mountains montagne snow (snowfall) neige (précipitation) ground temperature effects snowfall distribution article 1982 ftnrccanada 2024-08-05T14:05:07Z Twenty-eight drill holes ranging from 15 to 150 m in depth have been instrumented with strings of thermistors and thermocouples at six study sites between Plateau Mountain and Jasper, south-west Alberta. Measurements are made every four weeks and indicate that the lower limit of continuous permafrost forms a dome-shape with its centre at Bow Summit, at 2575 m. The limit lies around 2130 m at Jasper and 2270 m at Plateau Mountain. This dome appears to be due to increased snowfall around the ice caps and glaciers, and there may be an inverse relationship between the elevation of the glaciation limit and that of the lower limit of continuous permafrost at a given latitude. In areas of low winter snowfall, the zone of discontinuous permafrost usually extends only 25 m in elevation below the lower limit of continuous permafrost but probably increases in altitudinal range as mean winter snowfall increases. Relict permafrost occurs at Plateau Mountain, which is the only site which shows no signs of overriding by Pleistocene glaciers. Even there, present-day heating and cooling waves extend downwards throughout the layers being studied. It is therefore suggested that the "zone of zero amplitude" be renamed the "zone of minimal amplitude" defined as being where the amplitude over a period of two years is less than 0.20 degrees C. Des chapelets de thermistor et de thermocouples ont été installés dans vingt-huit forages d'une profondeur de 15 à 150 m en six emplacements entre le mont Plateau et Jasper dans le sud-ouest de l'Alberta. Des mesures effectuées toutes les quatre semaines indiquent que la limite inférieure du pergélisol continu forme un dôme dont le centre est à 2575 m au sommet Bow. Cette limite se trouve à 2130 m à Jasper et à 2270 m au mont Plateau. Le dôme semble attribuable à des chutes de neige accrues autour des calottes glaciaires ainsi que des glaciers et il peut exister une relation inverse entre l'altitude de la limite de la zone recouverte par la glace et l'altitude de la limite inférieure du ... Article in Journal/Newspaper Ice permafrost pergélisol National Research Council Canada: NRC Publications Archive |
institution |
Open Polar |
collection |
National Research Council Canada: NRC Publications Archive |
op_collection_id |
ftnrccanada |
language |
English |
topic |
permafrost pergélisol soils sol (terre) altitude mountains montagne snow (snowfall) neige (précipitation) ground temperature effects snowfall distribution |
spellingShingle |
permafrost pergélisol soils sol (terre) altitude mountains montagne snow (snowfall) neige (précipitation) ground temperature effects snowfall distribution Harris, S. A. Brown, R. J. E. Permafrost distribution along the Rocky Mountains in Alberta |
topic_facet |
permafrost pergélisol soils sol (terre) altitude mountains montagne snow (snowfall) neige (précipitation) ground temperature effects snowfall distribution |
description |
Twenty-eight drill holes ranging from 15 to 150 m in depth have been instrumented with strings of thermistors and thermocouples at six study sites between Plateau Mountain and Jasper, south-west Alberta. Measurements are made every four weeks and indicate that the lower limit of continuous permafrost forms a dome-shape with its centre at Bow Summit, at 2575 m. The limit lies around 2130 m at Jasper and 2270 m at Plateau Mountain. This dome appears to be due to increased snowfall around the ice caps and glaciers, and there may be an inverse relationship between the elevation of the glaciation limit and that of the lower limit of continuous permafrost at a given latitude. In areas of low winter snowfall, the zone of discontinuous permafrost usually extends only 25 m in elevation below the lower limit of continuous permafrost but probably increases in altitudinal range as mean winter snowfall increases. Relict permafrost occurs at Plateau Mountain, which is the only site which shows no signs of overriding by Pleistocene glaciers. Even there, present-day heating and cooling waves extend downwards throughout the layers being studied. It is therefore suggested that the "zone of zero amplitude" be renamed the "zone of minimal amplitude" defined as being where the amplitude over a period of two years is less than 0.20 degrees C. Des chapelets de thermistor et de thermocouples ont été installés dans vingt-huit forages d'une profondeur de 15 à 150 m en six emplacements entre le mont Plateau et Jasper dans le sud-ouest de l'Alberta. Des mesures effectuées toutes les quatre semaines indiquent que la limite inférieure du pergélisol continu forme un dôme dont le centre est à 2575 m au sommet Bow. Cette limite se trouve à 2130 m à Jasper et à 2270 m au mont Plateau. Le dôme semble attribuable à des chutes de neige accrues autour des calottes glaciaires ainsi que des glaciers et il peut exister une relation inverse entre l'altitude de la limite de la zone recouverte par la glace et l'altitude de la limite inférieure du ... |
format |
Article in Journal/Newspaper |
author |
Harris, S. A. Brown, R. J. E. |
author_facet |
Harris, S. A. Brown, R. J. E. |
author_sort |
Harris, S. A. |
title |
Permafrost distribution along the Rocky Mountains in Alberta |
title_short |
Permafrost distribution along the Rocky Mountains in Alberta |
title_full |
Permafrost distribution along the Rocky Mountains in Alberta |
title_fullStr |
Permafrost distribution along the Rocky Mountains in Alberta |
title_full_unstemmed |
Permafrost distribution along the Rocky Mountains in Alberta |
title_sort |
permafrost distribution along the rocky mountains in alberta |
publishDate |
1982 |
url |
https://nrc-publications.canada.ca/eng/view/ft/?id=9aec46be-b7f6-4bc2-b1c2-79fce285dae8 https://nrc-publications.canada.ca/eng/view/object/?id=9aec46be-b7f6-4bc2-b1c2-79fce285dae8 https://nrc-publications.canada.ca/fra/voir/objet/?id=9aec46be-b7f6-4bc2-b1c2-79fce285dae8 |
genre |
Ice permafrost pergélisol |
genre_facet |
Ice permafrost pergélisol |
op_relation |
Roger J.E. Brown Memorial Volume. Proceedings Fourth Canadian Permafrost Conference, Fourth Canadian Permafrost Conference, March 2, 1981, Calgary, Alberta, Canada, Publication date: 1982, Pages: 59–67 report_number:DBR-P-1074 |
_version_ |
1810449142831382528 |