Impact de la variabilité climatique sur la dynamique de la végétation par télédétection moyenne résolution à l'échelle régionale : le cas de la Bretagne

A time series of green vegetation cover fraction (fCOVER) issued from NASA MODIS medium resolution images and acquired over Brittany was used to identify land cover drivers of changes in intensive farming regions. The identification of climate drivers of changes was achieved using meteorological time series of precipitations and temperatures. The climate drivers of changes were compared to the Hess-Brezowsky classification. Results of this study highlight the dependency between meridian atmospheric circulation and the decrease of vegetation cover fraction during winter.