Polar deserts are areas with annual precipitation less than 250 mm and a mean temperature during the warmest month of less than 10° C.
Polar deserts on the Earth cover nearly 5 million square kilometers and are mostly bedrock or gravel plains.
Source: Death Valley
Types of
deserts
Source: Um Maine
Cro-Magnon Europe
GreenFacts Summary on Arctic Climate Change:
Español: Desierto polar
Français: Désert polaire