Antarctic Circle Poleward of this latitude (66 degrees 33 minutes S) there are 24 hours of sunlight on the summer solstice and 24 hours of darkness on the winter solstice.
TEMPERATE CLIMATE Climates with distinct winter and summer seasons, typical of regions found between the Tropics of Cancer and Capricorn and the Arctic and Antarctic Circles. Considered the climate of the middle latitudes.
Of or relating to the area around the geographic South Pole, from 90° South to the Antarctic Circle at approximately 66 1/2°South latitude, including the continent of Antarctica.
South to the Antarctic Circle at approximately 66 1/2?South latitude, including the continent of Antarctica.
A common misconception is that, within the Arctic and Antarctic Circles, the sun rises once in the spring and sets once in the fall; thus, the day and night are erroneously thought to last uninterrupted for 183 calendar days each.
The areas in the northern and southern hemispheres between the tropics and the Arctic and Antarctic circles.
Millibar
A metric unit of air pressure measurement equal to one hectapascal.
Polar day In polar regions, the portion of the year when the Sun is continuously in the sky. Its length changes from twenty hours at the Arctic/Antarctic Circle (latitude 66°33' N or S) to 186 days at the North/South Pole.
 See also: Antarctic, Arctic, Latitude, Period, Horizon
  
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