Ground Temperatures and Permafrost Warming from Forest to Tundra, Tuktoyaktuk Coastlands and Anderson Plain, NWT, Canada
Annual mean ground temperatures (Tg) decline northward from approximately −3.0°C in the boreal forest to −7.0°C in dwarf-shrub tundra in the Tuktoyuktuk Coastlands and Anderson Plain, NWT, Canada. The latitudinal decrease in Tg from forest to tundra is accompanied by an increase in the range of valu...
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Online Access: | https://ir.library.carleton.ca/pub/22838 https://doi.org/10.1002/ppp.1934 |
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ftcarletonunivir:oai:carleton.ca:22838 2023-05-15T17:09:30+02:00 Ground Temperatures and Permafrost Warming from Forest to Tundra, Tuktoyaktuk Coastlands and Anderson Plain, NWT, Canada Kokelj, S.V. (S. V.) Palmer, M.J. (M. J.) Lantz, T.C. (T. C.) Burn, C. (Christopher R.) 2017-07-01 https://ir.library.carleton.ca/pub/22838 https://doi.org/10.1002/ppp.1934 en eng https://ir.library.carleton.ca/pub/22838 doi:10.1002/ppp.1934 Permafrost and Periglacial Processes vol. 28 no. 3, pp. 543-551 active layer climate change ground temperature Mackenzie Delta area terrain disturbance tree line info:eu-repo/semantics/article 2017 ftcarletonunivir https://doi.org/10.1002/ppp.1934 2022-02-06T21:51:37Z Annual mean ground temperatures (Tg) decline northward from approximately −3.0°C in the boreal forest to −7.0°C in dwarf-shrub tundra in the Tuktoyuktuk Coastlands and Anderson Plain, NWT, Canada. The latitudinal decrease in Tg from forest to tundra is accompanied by an increase in the range of values measured in the central, tall-shrub tundra zone. Field measurements from 124 sites across this ecotone indicate that in undisturbed terrain Tg may approach 0°C in the forest and −4°C in dwarf-shrub tundra. The greatest range of local variation in Tg (~7°C) was observed in the tall-shrub transition zone. Undisturbed terrain units with relatively high Tg include riparian areas and slopes with drifting snow, saturated soils in polygonal peatlands and areas near lakes. Across the region, the warmest permafrost is associated with disturbances such as thaw slumps, drained lakes, areas burned by wildfires, drilling-mud sumps and roadsides. Soil saturation following terrain subsidence may increase the latent heat content of the active layer, while increases in snow depth decrease the rate of ground heat loss in autumn and winter. Such disturbances increase freezeback durat Article in Journal/Newspaper Mackenzie Delta permafrost Permafrost and Periglacial Processes Tundra Carleton University's Institutional Repository Canada Mackenzie Delta ENVELOPE(-136.672,-136.672,68.833,68.833) Tuktoyaktuk ENVELOPE(-133.006,-133.006,69.425,69.425) Permafrost and Periglacial Processes 28 3 543 551 |
institution |
Open Polar |
collection |
Carleton University's Institutional Repository |
op_collection_id |
ftcarletonunivir |
language |
English |
topic |
active layer climate change ground temperature Mackenzie Delta area terrain disturbance tree line |
spellingShingle |
active layer climate change ground temperature Mackenzie Delta area terrain disturbance tree line Kokelj, S.V. (S. V.) Palmer, M.J. (M. J.) Lantz, T.C. (T. C.) Burn, C. (Christopher R.) Ground Temperatures and Permafrost Warming from Forest to Tundra, Tuktoyaktuk Coastlands and Anderson Plain, NWT, Canada |
topic_facet |
active layer climate change ground temperature Mackenzie Delta area terrain disturbance tree line |
description |
Annual mean ground temperatures (Tg) decline northward from approximately −3.0°C in the boreal forest to −7.0°C in dwarf-shrub tundra in the Tuktoyuktuk Coastlands and Anderson Plain, NWT, Canada. The latitudinal decrease in Tg from forest to tundra is accompanied by an increase in the range of values measured in the central, tall-shrub tundra zone. Field measurements from 124 sites across this ecotone indicate that in undisturbed terrain Tg may approach 0°C in the forest and −4°C in dwarf-shrub tundra. The greatest range of local variation in Tg (~7°C) was observed in the tall-shrub transition zone. Undisturbed terrain units with relatively high Tg include riparian areas and slopes with drifting snow, saturated soils in polygonal peatlands and areas near lakes. Across the region, the warmest permafrost is associated with disturbances such as thaw slumps, drained lakes, areas burned by wildfires, drilling-mud sumps and roadsides. Soil saturation following terrain subsidence may increase the latent heat content of the active layer, while increases in snow depth decrease the rate of ground heat loss in autumn and winter. Such disturbances increase freezeback durat |
format |
Article in Journal/Newspaper |
author |
Kokelj, S.V. (S. V.) Palmer, M.J. (M. J.) Lantz, T.C. (T. C.) Burn, C. (Christopher R.) |
author_facet |
Kokelj, S.V. (S. V.) Palmer, M.J. (M. J.) Lantz, T.C. (T. C.) Burn, C. (Christopher R.) |
author_sort |
Kokelj, S.V. (S. V.) |
title |
Ground Temperatures and Permafrost Warming from Forest to Tundra, Tuktoyaktuk Coastlands and Anderson Plain, NWT, Canada |
title_short |
Ground Temperatures and Permafrost Warming from Forest to Tundra, Tuktoyaktuk Coastlands and Anderson Plain, NWT, Canada |
title_full |
Ground Temperatures and Permafrost Warming from Forest to Tundra, Tuktoyaktuk Coastlands and Anderson Plain, NWT, Canada |
title_fullStr |
Ground Temperatures and Permafrost Warming from Forest to Tundra, Tuktoyaktuk Coastlands and Anderson Plain, NWT, Canada |
title_full_unstemmed |
Ground Temperatures and Permafrost Warming from Forest to Tundra, Tuktoyaktuk Coastlands and Anderson Plain, NWT, Canada |
title_sort |
ground temperatures and permafrost warming from forest to tundra, tuktoyaktuk coastlands and anderson plain, nwt, canada |
publishDate |
2017 |
url |
https://ir.library.carleton.ca/pub/22838 https://doi.org/10.1002/ppp.1934 |
long_lat |
ENVELOPE(-136.672,-136.672,68.833,68.833) ENVELOPE(-133.006,-133.006,69.425,69.425) |
geographic |
Canada Mackenzie Delta Tuktoyaktuk |
geographic_facet |
Canada Mackenzie Delta Tuktoyaktuk |
genre |
Mackenzie Delta permafrost Permafrost and Periglacial Processes Tundra |
genre_facet |
Mackenzie Delta permafrost Permafrost and Periglacial Processes Tundra |
op_source |
Permafrost and Periglacial Processes vol. 28 no. 3, pp. 543-551 |
op_relation |
https://ir.library.carleton.ca/pub/22838 doi:10.1002/ppp.1934 |
op_doi |
https://doi.org/10.1002/ppp.1934 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
28 |
container_issue |
3 |
container_start_page |
543 |
op_container_end_page |
551 |
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1766065614276788224 |