Climate and Permafrost 59 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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Main Author: Stuart A. Harris
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Subjects:
Ice
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.574.7388
http://pubs.aina.ucalgary.ca/cpc/cpc4-59.pdf
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spelling ftciteseerx:oai:CiteSeerX.psu:10.1.1.574.7388 2023-05-15T16:37:13+02:00 Climate and Permafrost 59 Permafrost distribution along the Rocky Mountains in Alberta Stuart A. Harris The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.574.7388 http://pubs.aina.ucalgary.ca/cpc/cpc4-59.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.574.7388 http://pubs.aina.ucalgary.ca/cpc/cpc4-59.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://pubs.aina.ucalgary.ca/cpc/cpc4-59.pdf text ftciteseerx 2016-01-08T12:42:00Z 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°C. Des chapelets de thermistor et de thermocouples ont kt6 install & dans vingt-huit forages d'une pro-fondeur de 15 a 150 m en six emplacements entre le mont Plateau et Jasper dans le sud-ouest de 1'Al-berta. Des mesures effectukes toutes les quatre semaines indiquent que la limite infkrieure du pergdisol Text Ice permafrost Unknown Plateau Mountain ENVELOPE(-133.935,-133.935,63.104,63.104)
institution Open Polar
collection Unknown
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language English
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°C. Des chapelets de thermistor et de thermocouples ont kt6 install & dans vingt-huit forages d'une pro-fondeur de 15 a 150 m en six emplacements entre le mont Plateau et Jasper dans le sud-ouest de 1'Al-berta. Des mesures effectukes toutes les quatre semaines indiquent que la limite infkrieure du pergdisol
author2 The Pennsylvania State University CiteSeerX Archives
format Text
author Stuart A. Harris
spellingShingle Stuart A. Harris
Climate and Permafrost 59 Permafrost distribution along the Rocky Mountains in Alberta
author_facet Stuart A. Harris
author_sort Stuart A. Harris
title Climate and Permafrost 59 Permafrost distribution along the Rocky Mountains in Alberta
title_short Climate and Permafrost 59 Permafrost distribution along the Rocky Mountains in Alberta
title_full Climate and Permafrost 59 Permafrost distribution along the Rocky Mountains in Alberta
title_fullStr Climate and Permafrost 59 Permafrost distribution along the Rocky Mountains in Alberta
title_full_unstemmed Climate and Permafrost 59 Permafrost distribution along the Rocky Mountains in Alberta
title_sort climate and permafrost 59 permafrost distribution along the rocky mountains in alberta
url http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.574.7388
http://pubs.aina.ucalgary.ca/cpc/cpc4-59.pdf
long_lat ENVELOPE(-133.935,-133.935,63.104,63.104)
geographic Plateau Mountain
geographic_facet Plateau Mountain
genre Ice
permafrost
genre_facet Ice
permafrost
op_source http://pubs.aina.ucalgary.ca/cpc/cpc4-59.pdf
op_relation http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.574.7388
http://pubs.aina.ucalgary.ca/cpc/cpc4-59.pdf
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