Rockglacier acceleration in the Turtmann valley (Swiss Alps) : probable controls

Permafrost geomorphological systems in a changing global climate. Special issue

Auteurs :
ROER, I.
KÄÄB, A.
DIKAU, R.
HUMLUM, O.

Description :
Temporal variations in mountain permafrost creep are discussed within a regional study on rockglacier kinematics. On all investigated active rockglaciers in the Turtmann valley, a distinct acceleration of horizontal velocities has been recorded since the early 1990s. The link between surface velocities and temperature development is investigated at 2 different scales. The signal of rockglacier speed-up in the period 1993-2001 fits well with the general increase in air temperature recorded during the 1990s. On the local scale, the pattern of BTS values coincides well with the surface-velocity pattern, but in areas with high velocities the BTS temperatures are clearly below -3°C.


Type de document :
Congrès

Source :
PACE21 Field Workshop, Longyearbyen, Norvege, 2004-09-08, Norsk geografisk tidsskrift, issn : 0029-1951, 2005, vol. 59, n°. 2, p. 157-163, nombre de pages : 7, Collation : Illustration, Références bibliographiques : 29 ref.

Date :
2005

Editeur :
Pays édition : Norvege, Oslo, Norske geografiske selskab ; Universitetsforlaget