Snow Cover

Global Map Snow Cover Image 1 Global Map Snow Cover Image 2 Global Map Snow Cover Image 3 Global Map Snow Cover Image 4 Global Map Snow Cover Image 5 Global Map Snow Cover Image 6 Global Map Snow Cover Image 7 Global Map Snow Cover Image 8 Global Map Snow Cover Image 9 Global Map Snow Cover Image 10 Global Map Snow Cover Image 11 Global Map Snow Cover Image 12 Global Map Snow Cover Image 13 Global Map Snow Cover Image 14 Global Map Snow Cover Image 15 Global Map Snow Cover Image 16 Global Map Snow Cover Image 17 Global Map Snow Cover Image 18 Global Map Snow Cover Image 19 Global Map Snow Cover Image 20 Global Map Snow Cover Image 21 Global Map Snow Cover Image 22 Global Map Snow Cover Image 23 Global Map Snow Cover Image 24 Global Map Snow Cover Image 25 Global Map Snow Cover Image 26 Global Map Snow Cover Image 27 Global Map Snow Cover Image 28 Global Map Snow Cover Image 29 Global Map Snow Cover Image 30 Global Map Snow Cover Image 31 Global Map Snow Cover Image 32 Global Map Snow 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Snow Cover
Snow Cover Scale

Snow is precipitation that forms when water vapor freezes. Because snow is so reflective, it plays an important role in regulating climate: it reflects incoming sunlight back into space, cooling the planet. Snow also supports life. Melting of seasonal snow (as well as glaciers) provides water for drinking and irrigating crops in many parts of the world. Snowmelt moisturizes soil and reduces the risk of wildfire. Too much snow, however, can lead to springtime floods when the snowpack melts.

These snow cover maps are made from observations collected by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Terra satellite. Snow cover values range from medium blue (greater than 0 percent) to white (100 percent). Landmasses that do not sustain snow cover and places where MODIS did not collect data are gray. Because MODIS relies on visible light to assess snow cover, the sensor cannot collect data over the highest latitudes of the Northern Hemisphere during winter when no sunlight reaches those regions.

Snow and ice cover most of the Earth’s polar regions throughout the year, but the coverage at lower latitudes depends on season and elevation. High-altitude landscapes such as the Tibetan Plateau and the Andes and Rocky Mountains maintain some amount of snow cover almost year round. Land area is larger and snow cover is more variable in the Northern Hemisphere than in the Southern Hemisphere.

View, download, or analyze more of these data from NASA Earth Observations (NEO):
Snow Cover