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Patterns in vegetation composition, surface height and thaw depth in polygon mires in the Yakutian Arctic (NE Siberia) : a microtopographical characterisation of the active layer

The Permafrost Young Researchers Network (PYRN). Special issue

Auteur(s) et Affiliation(s)

MINKE, M.
Inst. of Botany and Landscape Ecology, Ernst-Moritz-Arndt Univ., Greifswald, Allemagne
DONNER, N.
Inst. of Botany and Landscape Ecology, Ernst-Moritz-Arndt Univ., Greifswald, Allemagne
KARPOV, N.
Inst. of Biological Problems of the Cryolithozone (SD RAS), Yakutsk, Russie, Federation de
DE KLERK, P.
Inst. of Botany and Landscape Ecology, Ernst-Moritz-Arndt Univ., Greifswald, Allemagne
JOOSTEN, H.
Inst. of Botany and Landscape Ecology, Ernst-Moritz-Arndt Univ., Greifswald, Allemagne
LEWKOWICZ, A.
Univ., Ottawa, Canada


Description :
This paper presents a microtopographical characterisation of the active layer, mapping of two low-centred ice-wedge polygons in the Yakutian tundra (NE Siberia) along a regular grid with 1-m spacing. The results revealed large spatial variability in thaw depths and strong correlation with relief, water and vegetation. Average thaw depths in polygon ridges (23 cm and 31 cm) were smaller than in depressions (33 cm and 40 cm, respectively). The greatest thaw depths, however, were also found in the ridges and probably result from thermal erosion by water flow.


Type de document :
Article de monographie

Source :
Permafrost and periglacial processes, issn : 1045-6740, 2009, vol. 20, n°. 4, p. 357-368, nombre de pages : 12, Références bibliographiques : 1,5 p.

Date :
2009

Editeur :
Pays édition : Royaume-Uni, Chichester, Wiley

Langue :
Anglais
Droits :
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