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10 year surficial velocities on a rock glacier (Laurichard, French Alps)
Author(s) -
Francou Bernard,
Reynaud Louis
Publication year - 1992
Publication title -
permafrost and periglacial processes
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.867
H-Index - 76
eISSN - 1099-1530
pISSN - 1045-6740
DOI - 10.1002/ppp.3430030306
Subject(s) - geology , rock glacier , glacier , geomorphology , permafrost , glacier mass balance , period (music) , physical geography , oceanography , geography , physics , acoustics
A survey of painted lines on the top and frontal zone of a talus rock glacier allows one to present a longitudinal profile of the surficial velocity distribution. Measurements were taken over a 8–12 year period at regular intervals and the results now provide information on the variability of displacements. In the upper zone a recent slowing of movement coincides with negative mass balance of local glaciers. Discussion focuses on the variations in velocity of the rock glaciers over the short time‐scale.