polar cap

(redirected from Polar caps)
Also found in: Encyclopedia.

polar cap

n.
Either of the regions around a planet's poles that are permanently covered with ice or other frozen material. Also called polar ice cap.

polar cap

1. The mass of permanent ice that covers either of the Earth's polar regions.
2. The mass of frozen carbon dioxide and water that covers either of Mars's polar regions.
Mentioned in ?
References in periodicals archive ?
5 times larger than the present polar caps to provide such a high level of enrichment.
Baum WA and Martin LJ: Behavior of the Martian Polar Caps Since 1905.
Inside there was a compelling feature that said according to experts, there is little chance of another Titanic disaster ever occurring as there are fewer icebergs due to the polar caps melting at such an alarming rate.
Through a small telescope, and with good eyesight, you may be able to make out some of the planet's surface features - darker areas or white polar caps.
During these times, ice from the polar caps is redistributed into the mid-latitudes of Mars as a layer about 50 meters thick, in the same place that we see that the DLEs have formed.
The Martian polar caps are the most prominent features in any telescopic view of the planet.
In the 21st century, we recognize that climate change can impact national security--ranging from rising sea levels, to severe droughts, to the melting of the polar caps, to more frequent and devastating natural disasters that raise demand for humanitarian assistance and disaster relief," Panetta said.
Unusually the resting buds become covered in a white waxy coating nicknamed polar caps.
Headteacher Sarah Roberts added: "We've also adopted a polar bear the pupils have called Snowball, and the pupils have learnt all about climate change and they've made up songs about how Snowball needs the polar caps to survive for his survival.
For example, the area of climate change has a dramatic impact on national security: rising sea levels, to severe droughts, to the melting of the polar caps, to more frequent and devastating natural disasters all raise demand for humanitarian assistance and disaster relief.
THE RED PLANET Mars has polar caps like Earth, although they contain mostly frozen carbon dioxide instead of frozen water