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Tropical heat generates unstable air in this area, and air masses become extremely dry due to the loss of moisture during the process of tropical ascent. [1] Hadley cell above Sahara desert. Another significant determinant of tropical desert climate are Hadley cells. Hadley cells concentrate all precipitations in the hotter humid lower pressure ...
Shrubs and herbaceous vegetation are found in the deep wadis and gullies that can retain moisture, and after a rainfall there are areas that briefly sprout grasses. [4] Most of the plant diversity is in the southern Sinai, where 700 species of vascular plants have been recorded, and 35 endemic species. [ 4 ]
extent of tropical and subtropical grasslands, savannas, and shrublands. Tropical and subtropical grasslands, savannas, and shrublands is a terrestrial biome defined by the World Wide Fund for Nature. [1] The biome is dominated by grass and/or shrubs located in semi-arid to semi-humid climate regions of subtropical and tropical latitudes ...
A unique feature of many tropical páramos is the presence of giant rosette plants from a variety of plant families, such as Lobelia (Africa), Puya (South America), Cyathea (New Guinea), and Argyroxiphium (Hawai’i). These plant forms can reach elevations of 4,500–4,600 metres (14,800–15,100 ft) above sea level. [1]
The rocks are generally Precambrian, and include granite, gneiss, and schist. In places they are overlain by areas of younger volcanic rock, known as harrats . In Hadhramaut and Dhofar, the terrain is mostly sedimentary, including limestones, sandstones, bauxite and conglomerates over a base of older Precambrian igneous and metamorphic rocks.
The lower elevations of the Sandia–Manzano Mountains, the Magdalena–San Mateo Mountains, and the Gila Region partly border the Chihuahuan Desert and partly border other ecoregions that are not deserts. There are few urban areas within the desert: the largest is Ciudad Juárez with almost two million inhabitants; Chihuahua, Saltillo, and ...
Tropical grasslands, savannas, and shrublands [12] are spread over a large area of the tropics with a vegetation made up mainly of low shrubs and grasses, often including sclerophyll species. [12] Some of the most representative are the Western Zambezian grasslands in Zambia and Angola , as well as the Einasleigh upland savanna in Australia and ...
The South Saharan steppe and woodlands, also known as the South Sahara desert, is a deserts and xeric shrublands ecoregion of northern Africa.This band is a transitional region between the Sahara's very arid center (the Sahara desert ecoregion) to the north, and the wetter Sahelian Acacia savanna ecoregion to the south. [1]