The tropics fall between 10° and 25° north and
south latitude, bounded on the low-latitude side by equatorial
regions, and on the high latitude side by subtropical then
mid-latitude belts. Most informal usages of the term tropics
include the entire latitudinal belt between the tropics of Cancer
(23.5°N) and Capricorn (23.5°S). The tropics are characterized
by a marked seasonal cycle, because the sun is directly
overhead the tropic of Cancer at the summer solstice, and
above the tropic of Capricorn at the winter solstice. This
causes a large variation in the solar insolation at different
times of the year in each tropical zone.














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