Climatic Relationships of Permafrost Zones in Areas of Low Winter Snow-Cover
In areas with under 50 cm snow cover in winter, the permafrost zones show diagnostic long term freezing indices and thawing indices. The warmer boundary of the zone of continuous permafrost traverses the mean annual air temperature (MAAT). The boundary between discontinuous and sporadic permafrost l...
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The Arctic Institute of North America
1981
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/65559 2023-05-15T14:19:17+02:00 Climatic Relationships of Permafrost Zones in Areas of Low Winter Snow-Cover Harris, Stuart A. 1981-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65559 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65559/49473 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65559 ARCTIC; Vol. 34 No. 1 (1981): March: 1–100; 64-70 1923-1245 0004-0843 Atmospheric temperature Effects of climate on permafrost Permafrost Seasonal variations Snow cover Spatial distribution Thawing Treeline Alberta N.W.T Nunavut info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1981 ftunivcalgaryojs 2022-03-22T21:22:35Z In areas with under 50 cm snow cover in winter, the permafrost zones show diagnostic long term freezing indices and thawing indices. The warmer boundary of the zone of continuous permafrost traverses the mean annual air temperature (MAAT). The boundary between discontinuous and sporadic permafrost lies just on the cold side of 0° C MAAT. The sporadic permafrost zone includes the zone of ice caves and the regions with patches of ice beneath ponds and peatbogs, extending to 5° C MAAT at a thawing index of 4000 degree days per year. The relationship is applicable to Norway, Iceland, Spitzbergen, Canada and the People's Republic of Mongolia. There are some marked variations in lapse rate from one environment to another, the most marked of which occurs above tree line where the lapse rate increases markedly in winter, though not in summer. This produces a change in MAAT of 2.5° C on Plateau Mountain. The changes also occur at some points in non-permafrost areas and it appears likely that they are due to spatial and seasonal changes in albedo. Whatever the cause, the variations in lapse rate indicate that calculations of past world climate change based on data from one area may be misleading. Article in Journal/Newspaper Arctic Ice Iceland Nunavut permafrost Spitzbergen University of Calgary Journal Hosting Canada Norway Nunavut Plateau Mountain ENVELOPE(-133.935,-133.935,63.104,63.104) ARCTIC 34 1 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
Atmospheric temperature Effects of climate on permafrost Permafrost Seasonal variations Snow cover Spatial distribution Thawing Treeline Alberta N.W.T Nunavut |
spellingShingle |
Atmospheric temperature Effects of climate on permafrost Permafrost Seasonal variations Snow cover Spatial distribution Thawing Treeline Alberta N.W.T Nunavut Harris, Stuart A. Climatic Relationships of Permafrost Zones in Areas of Low Winter Snow-Cover |
topic_facet |
Atmospheric temperature Effects of climate on permafrost Permafrost Seasonal variations Snow cover Spatial distribution Thawing Treeline Alberta N.W.T Nunavut |
description |
In areas with under 50 cm snow cover in winter, the permafrost zones show diagnostic long term freezing indices and thawing indices. The warmer boundary of the zone of continuous permafrost traverses the mean annual air temperature (MAAT). The boundary between discontinuous and sporadic permafrost lies just on the cold side of 0° C MAAT. The sporadic permafrost zone includes the zone of ice caves and the regions with patches of ice beneath ponds and peatbogs, extending to 5° C MAAT at a thawing index of 4000 degree days per year. The relationship is applicable to Norway, Iceland, Spitzbergen, Canada and the People's Republic of Mongolia. There are some marked variations in lapse rate from one environment to another, the most marked of which occurs above tree line where the lapse rate increases markedly in winter, though not in summer. This produces a change in MAAT of 2.5° C on Plateau Mountain. The changes also occur at some points in non-permafrost areas and it appears likely that they are due to spatial and seasonal changes in albedo. Whatever the cause, the variations in lapse rate indicate that calculations of past world climate change based on data from one area may be misleading. |
format |
Article in Journal/Newspaper |
author |
Harris, Stuart A. |
author_facet |
Harris, Stuart A. |
author_sort |
Harris, Stuart A. |
title |
Climatic Relationships of Permafrost Zones in Areas of Low Winter Snow-Cover |
title_short |
Climatic Relationships of Permafrost Zones in Areas of Low Winter Snow-Cover |
title_full |
Climatic Relationships of Permafrost Zones in Areas of Low Winter Snow-Cover |
title_fullStr |
Climatic Relationships of Permafrost Zones in Areas of Low Winter Snow-Cover |
title_full_unstemmed |
Climatic Relationships of Permafrost Zones in Areas of Low Winter Snow-Cover |
title_sort |
climatic relationships of permafrost zones in areas of low winter snow-cover |
publisher |
The Arctic Institute of North America |
publishDate |
1981 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65559 |
long_lat |
ENVELOPE(-133.935,-133.935,63.104,63.104) |
geographic |
Canada Norway Nunavut Plateau Mountain |
geographic_facet |
Canada Norway Nunavut Plateau Mountain |
genre |
Arctic Ice Iceland Nunavut permafrost Spitzbergen |
genre_facet |
Arctic Ice Iceland Nunavut permafrost Spitzbergen |
op_source |
ARCTIC; Vol. 34 No. 1 (1981): March: 1–100; 64-70 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65559/49473 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/65559 |
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ARCTIC |
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34 |
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