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The melting of permafrost
Land surface characterised by very irregular surfaces of marshy hollows
and small hummocks formed by ice rich permafrost thaws
Creates a dark surface so more insolation warming the area further.
No heavy machinery can be placed on it unlike the hard permafrost.
Clearance of surface vegetation
Movement of vehicles
Urbanisation and industry
Ski resorts in the Alps removes vegetation
Disruption of ecosystem
In steep areas landslides are more common due to unstable ground.