Ice - Snow Cover |
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Sea Ice | North Pole Observations | Glaciers | Snow Cover The Arctic is generally snow covered in winter, so variations in snow
cover extent actually occurs in the sub-Arctic more than in the Arctic.
Snow cover area in Eurasia decreased in the early 1990s and during a cold
event in 2003, but generally the observational record (based on satellite
data) shows large year-to-year variability. Snow cover area in North America
decreased from the late 1980s onward, again with much year-to-year variability.
The twenty-four year trend in mean annual hemispheric snow extent indicates
a decrease of approximately 4% per decade.
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