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(Article of periodic en Anglais - 2014)

Document title

Permafrost in alpine rock faces from Jotunheimen and Hurrungane, Southern Norway

Authors(s) and Affiliation(s)

HIPP T. (1) ; ETZELMÜLLER B. (1) ; WESTERMANN S. (1 2) ;
(1) Dept. of Geosciences, Univ., Oslo, NORVEGE
(2) Center for Permafrost. Dept. of Geography & Geology, Univ., Copenhagen, DANEMARK

Abstract

To better estimate the thermal state of permafrost in steep rock walls in Norway, 5 temperature loggers were installed in 2009 and 2010, measuring the near-surface rock wall temperatures in vertical rock faces. Surface temperatures in rock walls in Norway are on average higher than the ambient air temperature, by about 1° C in shaded faces to more than 3° C in faces with other aspects. An aspect dependency of rock wall temperatures is mainly visible during summer, with deviations of up to 4° C between north- and south-facing walls. Based on a 1 D transient heat flow model, the active-layer thickness at the study sites was estimated to be in the range of 3 m to 5 m at 2300 m asl and 1600 m asl, respectively. As a first-order approximation, a spatial regression model based on elevation and potential incoming short-wave radiation was used to estimate the lower limit and distribution of rock wall permafrost under present-day conditions and for a scenario with average air temperatures increased by 2° C

Source

Article of periodic

published at : Permafrost and periglacial processes / ISSN 1045-6740 / CODEN PEPPED

Editor : Wiley, Chichester - ROYAUME-UNI (1990)

Millesime : 2014, vol. 25, no1 [pp. 1-13]

Bibliographic references : 1 p.

Collation : 9 fig., 2 tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.1799

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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