Soil water storage and active‐layer development in a sub‐alpine tundra hillslope, southern Yukon Territory, Canada
Estimates of water flux and storage in organic‐covered, permafrost terrains require an understanding of the factors controlling soil thaw. Field studies conducted in southern Yukon Territory, Canada, showed that ground freezing and thawing commenced at temperatures between −0.14 and −0.24°C. A tempe...
Published in: | Permafrost and Periglacial Processes |
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Online Access: | https://doi.org/10.1002/ppp.543 |
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ftrepec:oai:RePEc:wly:perpro:v:16:y:2005:i:4:p:369-382 2023-05-15T16:37:47+02:00 Soil water storage and active‐layer development in a sub‐alpine tundra hillslope, southern Yukon Territory, Canada W. L. Quinton T. Shirazi S. K. Carey J. W. Pomeroy https://doi.org/10.1002/ppp.543 unknown https://doi.org/10.1002/ppp.543 article ftrepec https://doi.org/10.1002/ppp.543 2020-12-04T13:31:25Z Estimates of water flux and storage in organic‐covered, permafrost terrains require an understanding of the factors controlling soil thaw. Field studies conducted in southern Yukon Territory, Canada, showed that ground freezing and thawing commenced at temperatures between −0.14 and −0.24°C. A temperature drop below −0.6°C had little effect on unfrozen moisture content. Unfrozen moisture storage shifted abruptly between a winter period value of ca. 50 mm and a summer period value of ca. 100 mm, although soil temperatures remained close to the freezing point for extended periods. The organic soil transmitted water laterally early in the thaw period while the water table still remained in the organic soil. Following this period, water movement was mainly vertical, between the ground surface and the underlying mineral sediment. The cumulative energy consumed in melting ice (ΣQi) in the active layer was ca. 76% of the cumulative ground heat flux, and ca. 15% of the cumulative net all‐wave radiation (ΣQ*) measured over the snow‐free ground surface. A strong linear correlation between ΣQ* and ΣQi, suggests that the degree of soil thaw can be estimated from ΣQ*. Copyright © 2005 John Wiley & Sons, Ltd. Article in Journal/Newspaper Ice permafrost Tundra Yukon RePEc (Research Papers in Economics) Canada Yukon Permafrost and Periglacial Processes 16 4 369 382 |
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Open Polar |
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RePEc (Research Papers in Economics) |
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ftrepec |
language |
unknown |
description |
Estimates of water flux and storage in organic‐covered, permafrost terrains require an understanding of the factors controlling soil thaw. Field studies conducted in southern Yukon Territory, Canada, showed that ground freezing and thawing commenced at temperatures between −0.14 and −0.24°C. A temperature drop below −0.6°C had little effect on unfrozen moisture content. Unfrozen moisture storage shifted abruptly between a winter period value of ca. 50 mm and a summer period value of ca. 100 mm, although soil temperatures remained close to the freezing point for extended periods. The organic soil transmitted water laterally early in the thaw period while the water table still remained in the organic soil. Following this period, water movement was mainly vertical, between the ground surface and the underlying mineral sediment. The cumulative energy consumed in melting ice (ΣQi) in the active layer was ca. 76% of the cumulative ground heat flux, and ca. 15% of the cumulative net all‐wave radiation (ΣQ*) measured over the snow‐free ground surface. A strong linear correlation between ΣQ* and ΣQi, suggests that the degree of soil thaw can be estimated from ΣQ*. Copyright © 2005 John Wiley & Sons, Ltd. |
format |
Article in Journal/Newspaper |
author |
W. L. Quinton T. Shirazi S. K. Carey J. W. Pomeroy |
spellingShingle |
W. L. Quinton T. Shirazi S. K. Carey J. W. Pomeroy Soil water storage and active‐layer development in a sub‐alpine tundra hillslope, southern Yukon Territory, Canada |
author_facet |
W. L. Quinton T. Shirazi S. K. Carey J. W. Pomeroy |
author_sort |
W. L. Quinton |
title |
Soil water storage and active‐layer development in a sub‐alpine tundra hillslope, southern Yukon Territory, Canada |
title_short |
Soil water storage and active‐layer development in a sub‐alpine tundra hillslope, southern Yukon Territory, Canada |
title_full |
Soil water storage and active‐layer development in a sub‐alpine tundra hillslope, southern Yukon Territory, Canada |
title_fullStr |
Soil water storage and active‐layer development in a sub‐alpine tundra hillslope, southern Yukon Territory, Canada |
title_full_unstemmed |
Soil water storage and active‐layer development in a sub‐alpine tundra hillslope, southern Yukon Territory, Canada |
title_sort |
soil water storage and active‐layer development in a sub‐alpine tundra hillslope, southern yukon territory, canada |
url |
https://doi.org/10.1002/ppp.543 |
geographic |
Canada Yukon |
geographic_facet |
Canada Yukon |
genre |
Ice permafrost Tundra Yukon |
genre_facet |
Ice permafrost Tundra Yukon |
op_relation |
https://doi.org/10.1002/ppp.543 |
op_doi |
https://doi.org/10.1002/ppp.543 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
16 |
container_issue |
4 |
container_start_page |
369 |
op_container_end_page |
382 |
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1766028088935710720 |