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polar cap
(redirected from Polar caps)

   Also found in: Encyclopedia, Wikipedia 0.01 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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The Martian polar caps contain hundreds of meters of layers composed of mixed ice and dust, and scientists have speculated that these layers formed in response to variations in orbital characteristics like the tilt of Mars' rotational axis, which controls the intensity of the seasons.
The research chimes with deep-sea isotope records that give insights into how Earth got its polar caps.
One American scientist recently published his predictions in which he claimed that the polar caps would be all but gone in no more than 10-15 years.
 
 
 
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