Polar Regions

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polar : (a) of or relating to a geographic pole or the region around it (b) coming from or having the characteristics of such a region — Merriam-Webster See also OneLook

Encyclopedia

Earth’s Polar Regions, also called the frigid zones or polar zones, are the areas of the planet that surround its geographical poles (the North and South Poles), lying within the polar circles. These high latitudes are dominated by floating sea ice covering much of the Arctic Ocean in the north, and by the Antarctic ice sheet on the continent of Antarctica and the Southern Ocean in the south. Polar regions receive less intense solar radiation than the other parts of Earth because the sun’s energy arrives at an oblique angle, spreading over a larger area, being less concentrated, and also travels a longer distance through the Earth’s atmosphere in which it may be absorbed, scattered or reflected, which is the same thing that causes winters to be colder than the rest of the year except in tropical regions. Polar regions are characterized by extremely cold temperatures, heavy glaciation wherever there is sufficient precipitation to form permanent ice, short and still cold summers, and extreme variations in daylight hours, with twenty-four hours of daylight in summer, and complete darkness at mid-winter. — Wikipedia

Polar Region (Encyclopædia Britannica)

The Arctic vs. the Antarctic (Camille Seaman, TED Ed)

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