Polar region — Earth s polar regions are the areas of the globe surrounding the poles also known as frigid zones. The North Pole and South Pole being the centers, these regions are dominated by the polar ice caps, resting respectively on the Arctic Ocean and… … Wikipedia
Drift ice — Drift ice, Greenland Drift ice is ice that floats on the surface of the water in cold regions, as opposed to fast ice, which is attached ( fastened ) to a shore. Usually drift ice is carried along by winds and sea currents, hence its name, drift… … Wikipedia
Polar Alignment — is the act of aligning the rotational axis of a telescopes equatorial mount in parallel with the rotational axis of the earth.There are various ways to achieve this. Alignment Methods The method to use differ depending on if the alignment is… … Wikipedia
Polar motion — is the movement of Earth s rotation axis across its surface. This is measured with respect to a reference frame in which the solid Earth is fixed (a so called Earth centered, Earth fixed or ECEF reference frame). This variation is only a few… … Wikipedia
Polar wander — is the phenomenon in which the North and South Poles of the Earth move with respect to the continents. This motion can be divided into two components, that due to continental drift (in which the continents move over the mantle), and true polar… … Wikipedia
Polar Cap Absorption — Beziehung von Ionosphäre und Erdatmosphäre Elektronendichte und Ionenzusammensetzung in den oberen Ionosphärenschichten … Deutsch Wikipedia
Polar bear — This article is about the animal. For other uses, see Polar bear (disambiguation) … Wikipedia
polar wandering — Migration of the magnetic poles of the Earth through geologic time. Scientific evidence indicates that the magnetic poles have slowly and erratically wandered across the surface of the Earth. Pole locations calculated from measurements on rocks… … Universalium
drift ice — noun masses of ice floating in the open sea • Hypernyms: ↑ice * * * noun : sea or lake ice broken apart by winds and currents : fragments of a floe * * * detached floating ice in masses that drift with the wind or ocean currents, as in the polar… … Useful english dictionary
drift ice — /ˈdrɪft aɪs/ (say drift uys) noun detached floating ice in masses which drift with the wind or ocean currents, as in the polar seas …
