- Snow cover extent in the Northern Hemisphere has declined significantly over the past 90 years, with most of the reductions occurring since 1980. Snow cover extent has decreased by 7% on average in March and April and by 53% in June over the 1967–2012 period.
- Snow mass in the Northern hemisphere has decreased by 7 % in March from 1982 to 2009; snow mass in Europe has decreased even more, but with large inter-annual variation.
- Model simulations project widespread reductions in the extent and duration of snow cover in Europe over the 21st century.
- Changes in snow cover affect the Earth’s surface reflectivity, water resources, the flora and fauna and their ecology, agriculture, forestry, tourism, snow sports, transport and power generation.