Downward water movement into frozen ground, western arctic coast, Canada
Field studies carried out mainly since 1975 in permafrost areas of Alaska, Canada, China, and the Soviet Union have been combined with the results of laboratory investigations to show that in summer water can move from the thawing active layer into the subjacent frozen active layer and under certain...
Published in: | Canadian Journal of Earth Sciences |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
1983
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/e83-012 http://www.nrcresearchpress.com/doi/pdf/10.1139/e83-012 |
id |
crcansciencepubl:10.1139/e83-012 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/e83-012 2024-09-15T18:11:24+00:00 Downward water movement into frozen ground, western arctic coast, Canada Mackay, J. Ross 1983 http://dx.doi.org/10.1139/e83-012 http://www.nrcresearchpress.com/doi/pdf/10.1139/e83-012 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Earth Sciences volume 20, issue 1, page 120-134 ISSN 0008-4077 1480-3313 journal-article 1983 crcansciencepubl https://doi.org/10.1139/e83-012 2024-08-29T04:08:48Z Field studies carried out mainly since 1975 in permafrost areas of Alaska, Canada, China, and the Soviet Union have been combined with the results of laboratory investigations to show that in summer water can move from the thawing active layer into the subjacent frozen active layer and under certain conditions even into the top of permafrost. Direct field evidence discussed includes: data from drilling and neutron probe logging, which show a summer increase in the ice content of already frozen ground; summer heave of heavemeters, with heave occurring in the frozen active layer; and increase in the ice content of the subjacent frozen ground in both permafrost and non-permafrost areas, caused by snowmelt infiltration. Indirect field and laboratory evidence is also added to support the direct lines of evidence. The conditions that favor the downward migration of water from thawed to frozen ground are examined in terms of thermally induced hydraulic gradients, hydraulic conductivity, content of unfrozen pore water, temperature gradients, ice content, and gravity. Some geocryologic implications of the summer growth of ice in frozen ground, including the effects on water balance calculations and the origin of patterned ground, are briefly mentioned. Article in Journal/Newspaper Ice permafrost Alaska Canadian Science Publishing Canadian Journal of Earth Sciences 20 1 120 134 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
Field studies carried out mainly since 1975 in permafrost areas of Alaska, Canada, China, and the Soviet Union have been combined with the results of laboratory investigations to show that in summer water can move from the thawing active layer into the subjacent frozen active layer and under certain conditions even into the top of permafrost. Direct field evidence discussed includes: data from drilling and neutron probe logging, which show a summer increase in the ice content of already frozen ground; summer heave of heavemeters, with heave occurring in the frozen active layer; and increase in the ice content of the subjacent frozen ground in both permafrost and non-permafrost areas, caused by snowmelt infiltration. Indirect field and laboratory evidence is also added to support the direct lines of evidence. The conditions that favor the downward migration of water from thawed to frozen ground are examined in terms of thermally induced hydraulic gradients, hydraulic conductivity, content of unfrozen pore water, temperature gradients, ice content, and gravity. Some geocryologic implications of the summer growth of ice in frozen ground, including the effects on water balance calculations and the origin of patterned ground, are briefly mentioned. |
format |
Article in Journal/Newspaper |
author |
Mackay, J. Ross |
spellingShingle |
Mackay, J. Ross Downward water movement into frozen ground, western arctic coast, Canada |
author_facet |
Mackay, J. Ross |
author_sort |
Mackay, J. Ross |
title |
Downward water movement into frozen ground, western arctic coast, Canada |
title_short |
Downward water movement into frozen ground, western arctic coast, Canada |
title_full |
Downward water movement into frozen ground, western arctic coast, Canada |
title_fullStr |
Downward water movement into frozen ground, western arctic coast, Canada |
title_full_unstemmed |
Downward water movement into frozen ground, western arctic coast, Canada |
title_sort |
downward water movement into frozen ground, western arctic coast, canada |
publisher |
Canadian Science Publishing |
publishDate |
1983 |
url |
http://dx.doi.org/10.1139/e83-012 http://www.nrcresearchpress.com/doi/pdf/10.1139/e83-012 |
genre |
Ice permafrost Alaska |
genre_facet |
Ice permafrost Alaska |
op_source |
Canadian Journal of Earth Sciences volume 20, issue 1, page 120-134 ISSN 0008-4077 1480-3313 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/e83-012 |
container_title |
Canadian Journal of Earth Sciences |
container_volume |
20 |
container_issue |
1 |
container_start_page |
120 |
op_container_end_page |
134 |
_version_ |
1810448983917592576 |