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The tropics are the regions of Earth surrounding the Equator, where the sun may shine directly overhead. This contrasts with the temperate or polar regions of Earth, where the Sun can never be directly overhead. This is because of Earth's axial tilt; the width of the tropics (in latitude) is twice the tilt.
Tropical ecology is the study of the relationships between the biotic and abiotic components of the tropics, or the area of the Earth that lies between the Tropic of Cancer and the Tropic of Capricorn (23.4378° N and 23.4378° S, respectively). The tropical climate experiences hot, humid weather and rainfall year-round.
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 Tropic of Cancer's position is not fixed, but constantly changes because of a slight wobble in the Earth's longitudinal alignment relative to the ecliptic, the plane in which the Earth orbits around the Sun. Earth's axial tilt varies over a 41,000-year period from about 22.1 to 24.5 degrees, and as of 2000 is about 23.4 degrees, which will ...
The 1977 cold snap caused more than $300 million in agricultural damage in South Florida, known for its orange groves and other crops. Coral can also be harmed during these cold snaps, as was the ...
After then, the center of the Sun at the high point, the zenith, of the sky (which makes for the subsolar point beneath) aligns with successive latitudes in the southern tropics. The Sun passes overhead of these then does so once per year for the Tropic of Capricorn at the December solstice, then passes back again over those latitudes to return ...
New research shows how marine mammals ignore the rules of biology to thrive in the world's coldest waters
The subtropics are geographic and climate zones located roughly between the Tropic of Cancer and Tropic of Capricorn and the 40th parallel in both hemispheres. Subtropical climate regions can exist at high elevations within the tropics, such as across the Mexican Plateau and the Ethiopian Highlands and in Da Lat of the Vietnamese Central ...