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polar cap

   Also found in: Encyclopedia, Wikipedia 0.02 sec.
polar cap
n.
1.
a. Either of the regions around the poles of the earth that are permanently covered with ice.
b. A high-altitude icecap.
2. Astronomy Either of the regions around the poles of Mars that are covered with frozen carbon dioxide and water.

polar cap
1. The mass of ice that covers either of the Earth's polar regions year-round.
2. The mass of frozen carbon dioxide and water that covers either of Mars's polar regions.


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As the polar cap retreats, the remote outpost of the Phoenix Mars Lander will be uncovered.
Perron and Huybers used spacecraft images of exposed layers and elevation measurements to construct virtual "cores" through the north polar cap.
The research chimes with deep-sea isotope records that give insights into how Earth got its polar caps.
 
 
 
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