Snow refers to forms of ice crystals that precipitate from the atmosphere (usually from clouds) and undergo changes on the Earth's surface. Snow cover on the ground plays a significant role in the climate system due to its high albedo, heat insulation and contribution to soil moisture and runoff, thus an important variable in monitoring climate change.
Snow and Ice
Area covered by snow; Snow depth; Snow water equivalent
Change in Snow Cover Extend
Figure: 12-month running anomalies of monthly snow extent are plotted on the 7th month using values from November 1966 to December 2018.