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Cryogenic soil activity along bioclimatic gradients in Northern Sweden : Insights from eight different proxies

Auteur(s) et Affiliation(s)

KLAUS, M.
Dep. of Ecology and Environmental Science, Univ., Umeå, Suede
BECHER, M.
Dep. of Ecology and Environmental Science, Univ., Umeå, Suede
KLAMINDER, J.
Dep. of Ecology and Environmental Science, Univ., Umeå, Suede


Description :
Eight proxies of cryogenic soil activity (including measurements of soil surface motion, vegetation and grey values of aerial photographs) were examined at 8 study sites near Abisko. Six proxies were significantly correlated with each other. Soil surface motion increased by 3 to 5 times along the precipitation gradient and was 2 to 4 times greater at intermediate elevations than at low and high elevations, a pattern reflected by vegetation assemblages. The results suggest that inferences about how cryogenic soil activity changes with climate are independent of the choice of the proxy, although some proxies should be applied carefully. Four preferred proxies indicate that cryogenic soil activity may respond differently to climate warming along the elevation gradient and could be greatly modified by precipitation. This underlines the strong but spatially complex response of cryogenic processes to climate change in the Arctic.


Type de document :
Article de périodique

Source :
Permafrost and periglacial processes, issn : 1045-6740, 2013, vol. 24, n°. 3, p. 210-223, nombre de pages : 14, Références bibliographiques : 2 p.

Date :
2013

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

Langue :
Anglais
Droits :
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