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The tropics are defined as the region between the Tropic of Cancer in the Northern Hemisphere at 23°26′09.7″ (or 23.43603°) N and the Tropic of Capricorn in the Southern Hemisphere at 23°26′09.7″ (or 23.43603°) S; [8] these latitudes correspond to the axial tilt of the Earth.
World map showing the Tropic of Capricorn Relationship of Earth's axial tilt (ε) to the tropical and polar circles. The Tropic of Capricorn (or the Southern Tropic) is the circle of latitude that contains the subsolar point at the December (or southern) solstice. It is thus the southernmost latitude where the Sun can be seen directly overhead.
The Köppen climate classification is the most widely used climate classification system. [2] It defines a tropical climate as a region where the mean temperature of the coldest month is greater than or equal to 18 °C (64 °F) and does not fit into the criteria for B-group climates, classifying them as an A-group (tropical climate group). [3]
The Torrid Zone, between the Tropic of Cancer at 23°26′09.7″ N and the Tropic of Capricorn at 23°26′09.7″ S, covers 39.78% of Earth's surface. The South Temperate Zone, between the Tropic of Capricorn at 23°26′09.7″ S and the Antarctic Circle at 66°33′50.3″ S, covers 25.99% of Earth's surface.
Amazon River rain forest in Peru. Tropical rainforests are hot and wet. Mean monthly temperatures exceed 18 °C (64 °F) during all months of the year. [4] Average annual rainfall is no less than 1,680 mm (66 in) and can exceed 10 m (390 in) although it typically lies between 1,750 mm (69 in) and 3,000 mm (120 in). [5]
Tropical geography refers to the study of places and people in the tropics.When it first emerged as a discipline, tropical geography was closely associated with imperialism and colonial expansion of the European empires as contributing scholars tended to portray the tropical places as "primitive" and people "uncivilised" and "inferior". [1]
Tropical forests are often thought of as evergreen rainforests [2] and moist forests, but these account for only a portion of them (depending on how they are defined – see maps). The remaining tropical forests are a diversity of many different forest types including: Eucalyptus open forest, tropical coniferous forests, savanna woodland (e.g ...
The Tropic of Cancer, also known as the Northern Tropic, is the Earth's northernmost circle of latitude where the Sun can be seen directly overhead. This occurs on the June solstice , when the Northern Hemisphere is tilted toward the Sun to its maximum extent. [ 1 ]