Vegetation-Permafrost Relations within the Forest-Tundra Ecotone near Old Crow, Northern Yukon, Canada
Old Crow Flats is a 5600 km2 glaciolacustrine plain that straddles the forest-tundra ecotone in northern Yukon. Continuous taiga corridors occur in the entrenched river valleys, where annual mean ground temperatures (Tg) at the depth of zero annual amplitude at two locations were -3.1 and -4.0oC in...
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ftcarletonunivir:oai:carleton.ca:7813 2023-05-15T17:52:45+02:00 Vegetation-Permafrost Relations within the Forest-Tundra Ecotone near Old Crow, Northern Yukon, Canada Roy-Léveillée, P. Burn, C. (Christopher R.) Mcdonald, I.D. 2014-01-01 https://ir.library.carleton.ca/pub/7813 https://doi.org/10.1002/ppp.1805 en eng https://ir.library.carleton.ca/pub/7813 doi:10.1002/ppp.1805 Permafrost and Periglacial Processes vol. 25 no. 2, pp. 127-135 Forest-tundra Old Crow Permafrost Snow Treeline Vegetation info:eu-repo/semantics/article 2014 ftcarletonunivir https://doi.org/10.1002/ppp.1805 2022-02-06T21:51:28Z Old Crow Flats is a 5600 km2 glaciolacustrine plain that straddles the forest-tundra ecotone in northern Yukon. Continuous taiga corridors occur in the entrenched river valleys, where annual mean ground temperatures (Tg) at the depth of zero annual amplitude at two locations were -3.1 and -4.0oC in 2013. On the Flats, the vegetation cover is patchy, and Tg varied between -5.1 and -2.6oC. Annual mean near-surface permafrost temperatures (Tps) measured on the Flats between 2008 and 2011 in patches of taiga, tall shrubs and low shrubs were correlated with local snow depth. Snow depth was controlled by vegetation height if the snow supply was not limited, for example, where low shrubs and large lakes dominate the landscape. In this setting, snow depths and, hence, Tps in taiga patches were higher (-2.6 to -2.9oC) than in the surrounding shrub vegetation (-3.5 to -5.5oC). Where taiga patches were more extensive, redistributed snow was trapped at the patch edge and Tps in taiga was lower (-4.1 to -4.3oC) than in the surrounding shrub patches (-3.2 to -3.6oC). The permafrost temperature field is heterogeneous under patchy vegetation in the forest-tundra ecotone. Our data suggest that it is governed by both the snow-holding capacity of local vegetation patches and the spatial configuration of vegetation in the surrounding landscape, which controls snow supply. Article in Journal/Newspaper Old Crow permafrost Permafrost and Periglacial Processes taiga Tundra Yukon Carleton University's Institutional Repository Canada Old Crow Flats ENVELOPE(-139.755,-139.755,68.083,68.083) The Flats ENVELOPE(-56.948,-56.948,51.467,51.467) Yukon Permafrost and Periglacial Processes 25 2 127 135 |
institution |
Open Polar |
collection |
Carleton University's Institutional Repository |
op_collection_id |
ftcarletonunivir |
language |
English |
topic |
Forest-tundra Old Crow Permafrost Snow Treeline Vegetation |
spellingShingle |
Forest-tundra Old Crow Permafrost Snow Treeline Vegetation Roy-Léveillée, P. Burn, C. (Christopher R.) Mcdonald, I.D. Vegetation-Permafrost Relations within the Forest-Tundra Ecotone near Old Crow, Northern Yukon, Canada |
topic_facet |
Forest-tundra Old Crow Permafrost Snow Treeline Vegetation |
description |
Old Crow Flats is a 5600 km2 glaciolacustrine plain that straddles the forest-tundra ecotone in northern Yukon. Continuous taiga corridors occur in the entrenched river valleys, where annual mean ground temperatures (Tg) at the depth of zero annual amplitude at two locations were -3.1 and -4.0oC in 2013. On the Flats, the vegetation cover is patchy, and Tg varied between -5.1 and -2.6oC. Annual mean near-surface permafrost temperatures (Tps) measured on the Flats between 2008 and 2011 in patches of taiga, tall shrubs and low shrubs were correlated with local snow depth. Snow depth was controlled by vegetation height if the snow supply was not limited, for example, where low shrubs and large lakes dominate the landscape. In this setting, snow depths and, hence, Tps in taiga patches were higher (-2.6 to -2.9oC) than in the surrounding shrub vegetation (-3.5 to -5.5oC). Where taiga patches were more extensive, redistributed snow was trapped at the patch edge and Tps in taiga was lower (-4.1 to -4.3oC) than in the surrounding shrub patches (-3.2 to -3.6oC). The permafrost temperature field is heterogeneous under patchy vegetation in the forest-tundra ecotone. Our data suggest that it is governed by both the snow-holding capacity of local vegetation patches and the spatial configuration of vegetation in the surrounding landscape, which controls snow supply. |
format |
Article in Journal/Newspaper |
author |
Roy-Léveillée, P. Burn, C. (Christopher R.) Mcdonald, I.D. |
author_facet |
Roy-Léveillée, P. Burn, C. (Christopher R.) Mcdonald, I.D. |
author_sort |
Roy-Léveillée, P. |
title |
Vegetation-Permafrost Relations within the Forest-Tundra Ecotone near Old Crow, Northern Yukon, Canada |
title_short |
Vegetation-Permafrost Relations within the Forest-Tundra Ecotone near Old Crow, Northern Yukon, Canada |
title_full |
Vegetation-Permafrost Relations within the Forest-Tundra Ecotone near Old Crow, Northern Yukon, Canada |
title_fullStr |
Vegetation-Permafrost Relations within the Forest-Tundra Ecotone near Old Crow, Northern Yukon, Canada |
title_full_unstemmed |
Vegetation-Permafrost Relations within the Forest-Tundra Ecotone near Old Crow, Northern Yukon, Canada |
title_sort |
vegetation-permafrost relations within the forest-tundra ecotone near old crow, northern yukon, canada |
publishDate |
2014 |
url |
https://ir.library.carleton.ca/pub/7813 https://doi.org/10.1002/ppp.1805 |
long_lat |
ENVELOPE(-139.755,-139.755,68.083,68.083) ENVELOPE(-56.948,-56.948,51.467,51.467) |
geographic |
Canada Old Crow Flats The Flats Yukon |
geographic_facet |
Canada Old Crow Flats The Flats Yukon |
genre |
Old Crow permafrost Permafrost and Periglacial Processes taiga Tundra Yukon |
genre_facet |
Old Crow permafrost Permafrost and Periglacial Processes taiga Tundra Yukon |
op_source |
Permafrost and Periglacial Processes vol. 25 no. 2, pp. 127-135 |
op_relation |
https://ir.library.carleton.ca/pub/7813 doi:10.1002/ppp.1805 |
op_doi |
https://doi.org/10.1002/ppp.1805 |
container_title |
Permafrost and Periglacial Processes |
container_volume |
25 |
container_issue |
2 |
container_start_page |
127 |
op_container_end_page |
135 |
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1766160468362133504 |