polar caps


Also found in: Dictionary.

polar caps

Regions of ice that form around the northern and southern poles of a planet or planetary satellite. Earth's polar caps consist of water ice and snow whereas the caps of Mars are comprised of both water ice and frozen carbon dioxide. The southern polar cap of Triton is pink and thought to be due to nitrogen snow and ice. Polar caps can show seasonal variation.
References in periodicals archive ?
Lowell's contention was that the canals, as seen from Earth, were not just waterways but agricultural zones fed by water from the planet's polar caps.
Interannual differences in the regressions of the polar caps of Mars.
Reducing the ice mass at the polar caps and distributing it throughout the oceans of the world can have the reverse effect and potentially slow the Earth's rotation and change the magnetic field that rotation creates, according to the Japanese researchers.
The Martian polar caps are the most prominent features in any telescopic view of the planet.
Unusually the resting buds become covered in a white waxy coating nicknamed polar caps. This is a mechanism that protects the growing tip and may explain how it has survived many ice ages.
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."
THE RED PLANET Mars has polar caps like Earth, although they contain mostly frozen carbon dioxide instead of frozen water
The rings of Saturn when first seen edge-on just take your breath away, as do the white polar caps on Mars.
Then Al Gore came under attack about the statement he made on melting of polar caps. An Irish film maker Phelim McAleer made his way to Copenhagen, asking people if they have seen Phil Jones -- climate scientist who figures in hacked emails.
Amy Sibson, 14, of Redcar: "I read somewhere that Marske is going to be affected by polar caps melting so future generations might not be able to live here.
Then there was the gift of global warming - polar caps melting, climate change, pollution, loss of species and poverty are just some of the components of that pressie.
The following lemma on the diameter of the polar caps has an elementary proof, which is omitted.