Mechanisms of Landslide Destabilization Induced by Glacier‐Retreat on Tungnakvíslarjökull Area, Iceland

The massive worldwide deglaciation leads to more frequent slope instabilities in mountainous terrains. The physical processes leading to such destabilizations are poorly constrained due to little monitoring of dynamic parameters at the local scale. Here we study a very large slow‐moving landslide (∼...

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Bibliographic Details
Published in:Geophysical research letters 2022-07, Vol.49 (14), p.n/a
Main Authors: Lacroix, Pascal, Belart, Joaquin M. C., Berthier, Etienne, Sæmundsson, Þorsteinn, Jónsdóttir, Kristín
Format: Article
Language:English
Subjects:
Acceleration
asperity
Deglaciation
Destabilization
Dynamics
Earth Sciences
Earthquakes
Glacier retreat
Glaciers
Image segmentation
Kinematics
landslide
Landslides
Mass
Mathematical analysis
Meltwater
Remote sensing
Satellite imagery
Satellites
Sciences of the Universe
Seismic activity
Seismicity
Seismograms
seismology
Slope stability
Slopes
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Summary:The massive worldwide deglaciation leads to more frequent slope instabilities in mountainous terrains. The physical processes leading to such destabilizations are poorly constrained due to little monitoring of dynamic parameters at the local scale. Here we study a very large slow‐moving landslide (∼0.8 km2), on the flank of Tungnakvíslarjökull glacier in Iceland. Based on a combination of remote sensing images, we monitor the landslide and glacier kinematics over 75 years, with a focus over the period 1999–2019 when rapid glacier wastage has been observed. The landslide accelerates from 2 to 45 m/yr in the 6 years following a sudden increase in glacier mass loss. This acceleration coincides with intense quake activity (Mℓ 
ISSN:0094-8276
1944-8007
DOI:10.1029/2022GL098302