"' Polar deserts "'are areas with annual precipitation less than and a mean temperature during the warmest month of less than.
12.
Polar deserts such as McMurdo Dry Valleys remain ice-free because of the dry katabatic winds that flow downhill from the surrounding mountains.
13.
Regions under the polar high also experience very low levels of precipitation, which leads them to be known as " polar deserts ".
14.
The rocks tell a fascinating story of continental collision, shallow tropical seas, hot deserts, tropical swamps, coastal lagoons, vast ice sheets and polar deserts.
15.
Precipitation levels are so low ( only about 25 to 200 mm per year, all as snow ) that it is called a polar desert.
16.
A stretch of polar desert at about 75 degrees north latitude in Canada's Nunavut Territory, the island is the home to the 15-mile-diameter Haughton impact crater.
17.
But Imre Friedmann, a biologist and now director of the Polar Desert Research Center at Florida State University in Tallahassee, thought that was the wrong approach.
18.
Air temperatures recorded continuously over a 14-year period ending in 1999 declined by about 1 degree F in the polar deserts and across the White Continent, that paper said.
19.
The " Tsar " occurred over the southern half of the Arctic polar desert island of Novaya Zemlya, with no similar population centers within hundreds of kilometers at that time.
20.
Areas of the Arctic, such as Banks Island, and the McMurdo Dry Valleys in Antarctica are considered polar deserts where glaciers cannot form because they receive little snowfall despite the bitter cold.
