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ZONE DISCONTINUOUS PERMAFROST [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2011-12-21

English

Subject field(s)
  • Glaciology
CONT

The discontinuous permafrost zone is broken into two other divisions : the widespread permafrost zone, where permafrost underlies 50-90% of the land area, and the sporadic permafrost zone, where it occurs mostly in peatlands and underlies 10-50% of the land area.

Key term(s)
  • discontinuous permafrost area
  • zone of discontinuous permafrost

French

Domaine(s)
  • Glaciologie
CONT

La zone à pergélisol discontinu comporte deux sous-divisions : la zone à pergélisol étendu, où le pergélisol est sous-jacent à 50-90 % de la surface, et la zone à pergélisol sporadique, où il est présent surtout sous les tourbières et est sous-jacent à 10-50 % de la surface.

Spanish

Save record 1

Record 2 2011-12-12

English

Subject field(s)
  • Glaciology
  • Polar Geography
CONT

Distribution of Permafrost.-Permafrost underlies more than 50% of the ground surface of Canada. The two major divisions of permafrost are continuous permafrost and discontinuous permafrost. In the continuous permafrost zone, permafrost occurs everywhere beneath the ground surface except large bodies of water. In the far north, it may be more than 500 m thick. The discontinuous permafrost zone is broken into two other divisions : the widespread permafrost zone, where permafrost underlies 50-90% of the land area, and the sporadic permafrost zone, where it occurs mostly inpeatlands and underlies 10-50% of the land area.

CONT

The total annual freezing index has been used to predict permafrost distribution, and the design freezing index is commonly used in engineering to estimate the maximum thickness of lake ice and the maximum depth of frost penetration in the ground.

French

Domaine(s)
  • Glaciologie
  • Géographie du froid
CONT

Distribution du pergélisol.- Le pergélisol est sous-jacent à plus de 50 % de la surface du Canada. Les deux types principaux de pergélisol sont le pergélisol continu et le pergélisol discontinu. Dans la zone à pergélisol continu, le pergélisol est présent partout sous la surface du sol, à l'exception des grandes étendues d'eau. Dans le Grand Nord il atteint plus de 500 m d'épaisseur. La zone à pergélisol discontinu comporte deux sous-divisions : la zone à pergélisol étendu, où le pergélisol est sous-jacent à 50-90 % de la surface, et la zone à pergélisol sporadique, où il est présent surtout sous les tourbières et est sous-jacent à 10-50 % de la surface.

Spanish

Save record 2

Record 3 2007-12-17

English

Subject field(s)
  • Glaciology
  • Geomorphology and Geomorphogeny
DEF

A peat hummock with a core of frozen peat and/or mineral soil rising to a height of 0. 5-10 m above a mire surface within the discontinuous permafrost zone.

OBS

The term "palsa" originates from the Finnish and Saami languages and means peat tussock or mound in peatlands.

OBS

palsen: plural of palsa.

OBS

palsa: term used at Natural Resources Canada - Earth Sciences Sector.

Key term(s)
  • palsen

French

Domaine(s)
  • Glaciologie
  • Géomorphologie et géomorphogénie
DEF

Monticule de quelques mètres de haut, formé par des ségrégations de glace, comme les pingos, mais seulement dans les tourbières arctiques.

OBS

Le palse se limite généralement à la tourbière dans la zone de pergélisol discontinu.

OBS

Quelques sources donnent ce nom au masculin.

OBS

palse : terme en usage à Ressources naturelles Canada - Secteur des sciences de la Terre.

Spanish

Save record 3

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