The Collapse of Solifluction Lobes as a Factor in Vegetating Blockfields
In the Ruby Mt area of southwestern Yukon, tongues and islands of vegetation occur in certain blockfields, which through normal processes develop soil and vegetation only very slowly, due to a lack of near-surface water and great diurnal temperature extremes during summer. The collapse occurs when t...
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The Arctic Institute of North America
1969
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ftunivcalgaryojs:oai:journalhosting.ucalgary.ca:article/66281 2023-05-15T14:19:20+02:00 The Collapse of Solifluction Lobes as a Factor in Vegetating Blockfields Price, Larry W. 1969-01-01 application/pdf https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66281 eng eng The Arctic Institute of North America https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66281/50194 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66281 ARCTIC; Vol. 22 No. 4 (1969): December: 365–456; 395-402 1923-1245 0004-0843 Active layer Creep Frozen ground Mass wasting Permafrost Plant cover Plant distribution Plant-soil relationships Plants (Biology) Slopes Ruby Range Yukon info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research-article 1969 ftunivcalgaryojs 2022-03-22T21:23:12Z In the Ruby Mt area of southwestern Yukon, tongues and islands of vegetation occur in certain blockfields, which through normal processes develop soil and vegetation only very slowly, due to a lack of near-surface water and great diurnal temperature extremes during summer. The collapse occurs when the lobes move from the meadow onto the steeper slope of the blockfield where composition of vegetation changes and where there is a deeper active layer. Once collapsed, they flow downslope transporting clumps of vegetation which may establish themselves along the mud-flow channel or levee. Thus certain arctic and alpine slopes are vegetated more quickly than would otherwise be possible. L'effondrement de lobes de solifluxion, facteur de colonisation des champs de blocs par la végétation. Selon les processus normaux, le développement du sol et de la végétation dans les champs de blocs est très lent. C'est pourquoi, dans les monts Ruby, dans le sud-ouest du territoire du Yukon, on est surpris de trouver des langues et des îlots de végétation au milieu de certains champs de blocs. On propose comme mécanisme responsable de ce phénomène l'effondrement des lobes de solifluxion des pentes voisines. En passant de la pente douce de l'alpe à celle, plus forte, des champs de blocs, les lobes ne peuvent plus se maintenir à cause de cette pente plus prononcée, du changement de composition de la végétation et de l'épaisseur plus grande du mollisol. En s'effondrant, les lobes fluent le long de la pente, entraînant des masses de végétation qui s'établissent quelque part le long du chenal de coulée ou sur ses levées. De cette façon, de petits avant-postes de végétation se créent et accélèrent ainsi le processus qui, autrement, serait interminablement plus long. Article in Journal/Newspaper Arctic Arctic permafrost Yukon University of Calgary Journal Hosting Arctic Lent ENVELOPE(-66.783,-66.783,-66.867,-66.867) Yukon ARCTIC 22 4 |
institution |
Open Polar |
collection |
University of Calgary Journal Hosting |
op_collection_id |
ftunivcalgaryojs |
language |
English |
topic |
Active layer Creep Frozen ground Mass wasting Permafrost Plant cover Plant distribution Plant-soil relationships Plants (Biology) Slopes Ruby Range Yukon |
spellingShingle |
Active layer Creep Frozen ground Mass wasting Permafrost Plant cover Plant distribution Plant-soil relationships Plants (Biology) Slopes Ruby Range Yukon Price, Larry W. The Collapse of Solifluction Lobes as a Factor in Vegetating Blockfields |
topic_facet |
Active layer Creep Frozen ground Mass wasting Permafrost Plant cover Plant distribution Plant-soil relationships Plants (Biology) Slopes Ruby Range Yukon |
description |
In the Ruby Mt area of southwestern Yukon, tongues and islands of vegetation occur in certain blockfields, which through normal processes develop soil and vegetation only very slowly, due to a lack of near-surface water and great diurnal temperature extremes during summer. The collapse occurs when the lobes move from the meadow onto the steeper slope of the blockfield where composition of vegetation changes and where there is a deeper active layer. Once collapsed, they flow downslope transporting clumps of vegetation which may establish themselves along the mud-flow channel or levee. Thus certain arctic and alpine slopes are vegetated more quickly than would otherwise be possible. L'effondrement de lobes de solifluxion, facteur de colonisation des champs de blocs par la végétation. Selon les processus normaux, le développement du sol et de la végétation dans les champs de blocs est très lent. C'est pourquoi, dans les monts Ruby, dans le sud-ouest du territoire du Yukon, on est surpris de trouver des langues et des îlots de végétation au milieu de certains champs de blocs. On propose comme mécanisme responsable de ce phénomène l'effondrement des lobes de solifluxion des pentes voisines. En passant de la pente douce de l'alpe à celle, plus forte, des champs de blocs, les lobes ne peuvent plus se maintenir à cause de cette pente plus prononcée, du changement de composition de la végétation et de l'épaisseur plus grande du mollisol. En s'effondrant, les lobes fluent le long de la pente, entraînant des masses de végétation qui s'établissent quelque part le long du chenal de coulée ou sur ses levées. De cette façon, de petits avant-postes de végétation se créent et accélèrent ainsi le processus qui, autrement, serait interminablement plus long. |
format |
Article in Journal/Newspaper |
author |
Price, Larry W. |
author_facet |
Price, Larry W. |
author_sort |
Price, Larry W. |
title |
The Collapse of Solifluction Lobes as a Factor in Vegetating Blockfields |
title_short |
The Collapse of Solifluction Lobes as a Factor in Vegetating Blockfields |
title_full |
The Collapse of Solifluction Lobes as a Factor in Vegetating Blockfields |
title_fullStr |
The Collapse of Solifluction Lobes as a Factor in Vegetating Blockfields |
title_full_unstemmed |
The Collapse of Solifluction Lobes as a Factor in Vegetating Blockfields |
title_sort |
collapse of solifluction lobes as a factor in vegetating blockfields |
publisher |
The Arctic Institute of North America |
publishDate |
1969 |
url |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66281 |
long_lat |
ENVELOPE(-66.783,-66.783,-66.867,-66.867) |
geographic |
Arctic Lent Yukon |
geographic_facet |
Arctic Lent Yukon |
genre |
Arctic Arctic permafrost Yukon |
genre_facet |
Arctic Arctic permafrost Yukon |
op_source |
ARCTIC; Vol. 22 No. 4 (1969): December: 365–456; 395-402 1923-1245 0004-0843 |
op_relation |
https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66281/50194 https://journalhosting.ucalgary.ca/index.php/arctic/article/view/66281 |
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ARCTIC |
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22 |
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