Combination of Aerial, Satellite, and UAV Photogrammetry for Quantifying Rock Glacier Kinematics in the Dry Andes of Chile (30°S) Since the 1950s

Details

Ressource 1Download: Combination of Aerial, Satellite, and UAV Photogrammetry for Quantifying Rock Glacier Kinematics in the Dry Andes of Chile (30°S) Since.pdf (6337.45 [Ko])
State: Public
Version: Final published version
License: CC BY 4.0
Serval ID
serval:BIB_F4D0E20F2090
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Combination of Aerial, Satellite, and UAV Photogrammetry for Quantifying Rock Glacier Kinematics in the Dry Andes of Chile (30°S) Since the 1950s
Journal
Frontiers in Remote Sensing
Author(s)
Vivero Sebastián, Bodin Xavier, Farías-Barahona David, MacDonell Shelley, Schaffer Nicole, Robson Benjamin Aubrey, Lambiel Christophe
ISSN
2673-6187
Publication state
Published
Issued date
19/11/2021
Peer-reviewed
Oui
Volume
2
Language
english
Abstract
The diachronic analysis of aerial and satellite imagery, uncrewed aerial vehicle (UAV) and in situ surveys obtained between 1956 and 2019 are employed to analyse landform surface kinematics for the Tapado site located in the Dry Andes of Chile. A feature tracking procedure was used between series of orthorectified and co-registered images to calculate surface velocities on several ice-debris landforms, including rock glaciers and debris-covered glaciers. For the active rock glaciers, the results exhibit typical viscous flow, though local destabilisation process seems to occur, increased velocities since 2000 (>1 m/yr) and terminus advance. Nevertheless, the debris-covered glaciers displays heterogeneous spatial patterns of surface velocities, together with collapse (downwasting) associated with the development of thermokarst depressions and supraglacial ponds. Our findings show that surface kinematics and multitemporal observations derived from different sensors are valuable tools for differentiating between glacial and periglacial features. The pluri-decadal time series since 1956 constitute a unique dataset for documenting the surface kinematics of creeping mountain permafrost in the Southern Hemisphere. The approach developed in this work offers a way forward to reconstruct the recent behaviour of glacial and periglacial features in the Andes, where archival aerial photographs are available but have not previously been processed rigorously to obtain an accurate assessment of landform kinematics.
Keywords
rock glacier, photogrammetry, dry andes, mountain permafrost, Chile
Open Access
Yes
Create date
07/10/2022 14:15
Last modification date
21/11/2022 8:19
Usage data