Interactive comment on “ Brief communication : Historical glacier length changes in West Greenland ” by P .

This brief communication presents length fluctuations since the 19th century for glaciers in the western and southern Greenland. New data from the second half of the 20th century, computed using aerial photographs and satellites images allow the authors to extend the records previously presented by Weidick in 1968. This updating is interesting as it allows to put in perspective the current changes with the trend at the pluri-decadal/centennial scale, and confirms that the first part of the 20th century experimented the most important retreat rate in this region of the world.