Thermal Contraction Cracks in an Arctic Tundra Environment
Field observations in the Mackenzie Delta area largely substantiate Lachenbruch's theoretical considerations of thermal contraction crack development. Frost crack patterns, representing the incipient stage of tundra polygons, were observed on both bare and vegetated surfaces of low alluvial fla...
Published in: | ARCTIC |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
The Arctic Institute of North America
1972
|
Subjects: | |
Online Access: | https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66005 |
id |
ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/66005 |
---|---|
record_format |
openpolar |
spelling |
ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/66005 2023-05-15T14:19:19+02:00 Thermal Contraction Cracks in an Arctic Tundra Environment Kerfoot, Denis E. 1972-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66005 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66005/49919 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66005 ARCTIC; Vol. 25 No. 2 (1972): June: 73–168; 142-150 1923-1245 0004-0843 Icebreaking Ice pressure Ice-structure interaction Louis S. St. Laurent (Ship) Manhattan (Ship) Marine transportation Pressure ridges Sea ice Winds Baffin Bay-Davis Strait info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1972 ftunivcalgaryojs 2022-03-22T21:22:59Z Field observations in the Mackenzie Delta area largely substantiate Lachenbruch's theoretical considerations of thermal contraction crack development. Frost crack patterns, representing the incipient stage of tundra polygons, were observed on both bare and vegetated surfaces of low alluvial flats and sandspits of three islands. Individual polygons, where developed, ranged in size from 20 to 30 metres diameter on bare surfaces to 2 to 3 metres on sedge-covered areas, and 80% of the angular intersections measured were of orthogonal type. Most cracks exhibited random orientations, except in close proximity to water bodies where tendencies toward normal and subparallel orientations occurred. Article in Journal/Newspaper Arctic Arctic Baffin Bay Baffin Bay Baffin Davis Strait Mackenzie Delta Sea ice Tundra University of Calgary Journal Hosting Arctic Baffin Bay Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) ARCTIC 25 2 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
Icebreaking Ice pressure Ice-structure interaction Louis S. St. Laurent (Ship) Manhattan (Ship) Marine transportation Pressure ridges Sea ice Winds Baffin Bay-Davis Strait |
spellingShingle |
Icebreaking Ice pressure Ice-structure interaction Louis S. St. Laurent (Ship) Manhattan (Ship) Marine transportation Pressure ridges Sea ice Winds Baffin Bay-Davis Strait Kerfoot, Denis E. Thermal Contraction Cracks in an Arctic Tundra Environment |
topic_facet |
Icebreaking Ice pressure Ice-structure interaction Louis S. St. Laurent (Ship) Manhattan (Ship) Marine transportation Pressure ridges Sea ice Winds Baffin Bay-Davis Strait |
description |
Field observations in the Mackenzie Delta area largely substantiate Lachenbruch's theoretical considerations of thermal contraction crack development. Frost crack patterns, representing the incipient stage of tundra polygons, were observed on both bare and vegetated surfaces of low alluvial flats and sandspits of three islands. Individual polygons, where developed, ranged in size from 20 to 30 metres diameter on bare surfaces to 2 to 3 metres on sedge-covered areas, and 80% of the angular intersections measured were of orthogonal type. Most cracks exhibited random orientations, except in close proximity to water bodies where tendencies toward normal and subparallel orientations occurred. |
format |
Article in Journal/Newspaper |
author |
Kerfoot, Denis E. |
author_facet |
Kerfoot, Denis E. |
author_sort |
Kerfoot, Denis E. |
title |
Thermal Contraction Cracks in an Arctic Tundra Environment |
title_short |
Thermal Contraction Cracks in an Arctic Tundra Environment |
title_full |
Thermal Contraction Cracks in an Arctic Tundra Environment |
title_fullStr |
Thermal Contraction Cracks in an Arctic Tundra Environment |
title_full_unstemmed |
Thermal Contraction Cracks in an Arctic Tundra Environment |
title_sort |
thermal contraction cracks in an arctic tundra environment |
publisher |
The Arctic Institute of North America |
publishDate |
1972 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66005 |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) |
geographic |
Arctic Baffin Bay Mackenzie Delta |
geographic_facet |
Arctic Baffin Bay Mackenzie Delta |
genre |
Arctic Arctic Baffin Bay Baffin Bay Baffin Davis Strait Mackenzie Delta Sea ice Tundra |
genre_facet |
Arctic Arctic Baffin Bay Baffin Bay Baffin Davis Strait Mackenzie Delta Sea ice Tundra |
op_source |
ARCTIC; Vol. 25 No. 2 (1972): June: 73–168; 142-150 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66005/49919 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66005 |
container_title |
ARCTIC |
container_volume |
25 |
container_issue |
2 |
_version_ |
1766291007494684672 |