inscription
PORTAIL D'INFORMATION GÉOGRAPHIQUE

Detection of mountain permafrost by combining high resolution surface and subsurface information - an example from the Glatzbach catchment, Austrian Alps

Concepts and implications of environmental change and human impact : studies from Austrian geomorphological research

Auteur(s) et Affiliation(s)

OTTO, J.-C.
Dep. of Geography and Geology, Univ., Salzburg, Autriche
KEUSCHNIG, M.
Dep. of Geography and Geology, Univ., Salzburg, Autriche
alpS - Centre for Climate Change Adaptation Technologies, Innsbruck, Autriche
GÖTZ, J.
Dep. of Geography and Geology, Univ., Salzburg, Autriche
MARBACH, M.
Dep. of Geography and Geology, Univ., Salzburg, Autriche
SCHROTT, L.
Dep. of Geography and Geology, Univ., Salzburg, Autriche
KEILER, M.
Inst. of Geography, Univ., Bern, Suisse
Dep. of Geography and Regional Science, Univ., Graz, Autriche
Inst. of Remote Sensing and Photogrammetry, Univ. of Technology, Graz, Autriche
OTTO, J.-C.
Dep. of Geography and Geology, Univ., Salzburg, Autriche


Description :
The AA. combine high resolution surface data derived from terrestrial laser scanning with geophysical information on the underground conditions using ground penetrating radar and electrical resistivity tomography and ground surface temperature data in order to understand the effects of surface characteristics on permafrost distribution in the Alpine Glatzbach catchment. Analysis of surface roughness as a proxy for grain size distribution reveals that the lower boundary of discontinuous and sporadic permafrost is lowered on rough surfaces compared to fine-grain zones. At the same location modelled potential summer solar radiation in coarse grain zones is reduced by up to 40% compared to surfaces of fine grain sizes. The mostly patchy permafrost distribution at the Glatzbach can therefore be attributed to local surface cover characteristics, particularly regolith grain size and its influence on solar radiation.


Type de document :
Article de monographie

Source :
Geografiska annaler. Series A. Physical geography, issn : 0435-3676, 2012, vol. 94, n°. 1, p. 43-57-, Références bibliographiques : 42 ref.

Date :
2012

Editeur :
Pays édition : Suede, Stockholm, Svenska sällskapet för antropologi och geografi

Langue :
Anglais
Droits :
Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI)