Climate change impacts on snow cover:
The snow cover is an important parameter in the energy balance of the Earth, since snow surfaces reflect a large part of the incident global radiation. The state of the snow cover is particularly dependent on the temperature during precipitation events, but also on the amount of precipitation and the prevailing weather conditions before and after a snowfall. As a consequence of rising temperatures over the past decades, a decrease in snow cover has been observed worldwide, especially at very temperature-sensitive altitudes around the snow line. Significant long-term trends in snow cover duration and snow depth can be found in most mountain regions of the world. These trends are overlaid by a high natural year-to-year and decadal variability.