Title Investigation of rock and ice loss in a recently deglaciated mountain rock wall using terrestrial laser scanning; Gemsstock, Swiss Alps
Author Kenner, R.; Phillips, M.; Danioth, C.; Denier, C.; Thee, P.; Zgraggen, A.
Author Affil Kenner, R., WSL Institute for Snow and Avalanche Research SLF, Davos, Switzerland. Other: Andermatt Gotthard Sportbahnen, Switzerland; Terradata, Switzerland; Institut für Photogrammetrie and Fernerkundung, Germany
Source Cold Regions Science and Technology, 67(3), p.157-164, . Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0165- 232X
Publication Date July 2011
Notes In English. Based on Publisher- supplied data GeoRef Acc. No: 309689
Index Terms climatic change; deformation; erosion; ice; lasers; mass movements (geology); permafrost; rocks; slope stability; Switzerland--Swiss Alps; Alps; Central Europe; climate change; deglaciation; erosion rates; Europe; Gemsstock; laser methods; mass movements; monitoring; rockfalls; Swiss Alps; Switzerland
Abstract Monitoring of permafrost phenomena is an integral part of the investigation of Alpine natural environments. The sensitivity of permafrost to climate change and the resulting destabilization of slopes are of particular interest at present. Rock walls react rapidly to changing climate conditions and the consequences can be hazardous. Temporally and spatially resolved monitoring of the terrain surface using terrestrial laser scanning can contribute towards improved process understanding and the prevention and management of natural hazards. The advantages and disadvantages of two scan systems used to monitor a recently deglaciated permafrost rock wall at Gemsstock in the central Swiss Alps are analyzed here and the optimization of referencing methods and accuracy analyses are discussed. Mass movements of around 1800 m3 were detected and quantified over a period of 4 years and mean erosion rates of 6.5 mm year-1 were determined. Volumetric changes caused by rock fall and melting ice could be defined with an accuracy of 4%-10% of their surface area in cubic meters in the direction of projection.
URL http://hdl.handle.net/10.1016/j.coldregions.2011.04.006
Publication Type journal article
Record ID 65006409