Within the Tropics there are different vegetation zones
. These depend on the time, during which there is sufficient water available for plants to grow. The differentiation is made according to number of dry (arid
*) and wet (humid
climate close to the equator changes to a semi-humid
bzw. semi-arid tropical climate
towards the Tropics
*) , which results in different ecozones
*) from tropical forests
*) over various types of Savanna
*) to the tropical semi-deserts and deserts
In the humid tropics
, which surround the equator with exception of East Africa and the Andes, tropical rain forests
form. The semi-humid tropics
, in which the dry-
*) and wet seasons
*) shape the seasons
, are characterised by Savannas
*) , Dry forests
*) and Monsun forestsr
*) , which flank thetropical rain forests
, and also the wetlands of the Pantanal
*) in South America belong to this zone. The arid tropics
, where only small changes of temperature occur in the course of the year.
The tropical zone
(v. gr.: tropai heliou
sun turning areas) is the warmest climate zone of the earth
. The Tropics are:
- radiation-climatically regards the areas, which are limited by the Tropic of cancer and the tropic of capricorn (23,5° northern and southern latitude) and in those the sun stands at least once the year in the zenith (highest conditions = 90°C to the ground).
- in the system of the atmospheric circulation the range between the two subtropical-edge-tropical high pressure belts of the north and Southern Hemisphere of the earth.
- the range on both sides the equator, is coined/shaped by higher dailytemporal (time of day climate) and smaller seasonal variations in temperature (25 °C annual averages), since by the all year round high irradiation no thermal seasons can form,
- the range, within which the daily lengths in the course of the yearly vary only slightly between 10,5 and 13,5 hours.
As a border of the Tropics to the subtropics "Köppen" used the 18°-Isotherme, Supan and Phlippson the 20°-Isotherme of the coldest month. These demarcations refer however only to the warm tropics lain in small height over the sea level. In addition, the typical climatic characteristics of the Tropics are valid for the areas lain more highly. Because of the temperature decrease with the height one speaks if the 18° or 20°-Isotherme is fallen below, but computationally a higher value would result, from the cold tropics.
are areas, which are not in the tropics.