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Multi-decadal (1953–2017) rock glacier kinematics analysed by high-resolution topographic data in the upper Kaunertal, Austria

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Fleischer, Fabian ; Haas, Florian ; Piermattei, Livia ; Pfeiffer, Madlene ; Heckmann, Tobias ; Altmann, Moritz ; Rom, Jakob ; Stark, Manuel ; Wimmer, Michael ; Pfeifer, Norbert ; Becht, Michael:
Multi-decadal (1953–2017) rock glacier kinematics analysed by high-resolution topographic data in the upper Kaunertal, Austria.
In: The Cryosphere. 15 (2021) 12. - S. 5345-5369.
ISSN 1994-0416 ; 1994-0424

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Volltext Link zum Volltext (externe URL):
https://doi.org/10.5194/tc-15-5345-2021

Kurzfassung/Abstract

Permafrost is being degraded worldwide due to the change in external forcing caused by climate change. This has also been shown to affect the morphodynamics of active rock glaciers. We studied these changes, depending on the analysis, on nine or eight active rock glaciers, respectively, with different characteristics in multiple epochs between 1953 and 2017 in Kaunertal, Austria. A combination of historical aerial photographs and airborne laser scanning data and their derivatives were used to analyse surface movement and surface elevation change. In general, the studied landforms showed a significant acceleration of varying magnitude in the epoch 1997–2006 and a volume loss to variable degrees throughout the investigation period. Rock glaciers related to glacier forefields showed significantly higher rates of subsidence than talus-connected ones. Besides, we detected two rock glaciers with deviating behaviour and one that showed an inactivation of its terminal part. By analysing meteorological data (temperature, precipitation and snow cover onset and duration), we were able to identify possible links to these external forcing parameters. The catchment-wide survey further revealed that, despite the general trend, timing, magnitude and temporal peaks of morphodynamic changes indicate a slightly different sensitivity, response or response time of individual rock glaciers to fluctuations and changes in external forcing parameters.

Weitere Angaben

Publikationsform:Artikel
Sprache des Eintrags:Englisch
Institutionen der Universität:Mathematisch-Geographische Fakultät > Geographie > Lehrstuhl für Physische Geographie
DOI / URN / ID:10.5194/tc-15-5345-2021
Open Access: Freie Zugänglichkeit des Volltexts?:Ja
Peer-Review-Journal:Ja
Verlag:Copernicus Publ.
Die Zeitschrift ist nachgewiesen in:
Titel an der KU entstanden:Ja
KU.edoc-ID:29160
Eingestellt am: 06. Dez 2021 15:35
Letzte Änderung: 06. Dez 2021 23:26
URL zu dieser Anzeige: https://edoc.ku.de/id/eprint/29160/
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