Objectifs : Better knowledge of the evolution of the snow cover In mountain areas Gaspésie vs. French Alps Similar latitudes Both sides of the Atlantic Ocean Same time period : Winter months 1969 - 2011 Methods : Continuous series over the same period with Mean daily temperatures Daily total precipitations Snow depth (if available) Modeling of the snow cover evolution over the year (daily): Snow water equivalent Snow depth Liquid precipitation Solid precipitation Missing data filled in based on the output of the model Trend analysis on the winter period only (December to April