35 . Unlike other parts, these two regions can experience frost in the early mornings. It damages lichen fields because they are very fragile and can sustain damage easily. The troughs between these lines of dunes are interrupted by smaller transverse dunes. Le courant froid de Benguela, prolongation du courant circum-antarctique, remonte vers le nord en longeant la côte, refroidissant l'air et produisant ainsi du brouillard. Les rares pluies tombent en général sous la forme de brefs orages torrentiels. Climate of the Namib Desert. Fog consists of tiny droplets of water suspended in air; dew is water that forms on the surfaces of plants, soil and other objects on the ground. Climate change represents an important threat to global biodiversity and African ecosystems are particularly vulnerable. Keywords . A major threat to the Namib Desert is the impact of off road driving. Read Next. In the northern half the larger streams reach the sea, but between the Kuiseb and the Orange rivers every stream terminates in a vlei (salt pan or mud flat) against or among the dunes. A major threat to the Namib Desert is the impact of off road driving. Freezing temperatures occur occasionally along the inner edge of the desert. The desert basically consists of a relatively smooth platform of truncated bedrock of various types and ages. Kalahari Desert - Kalahari Desert - Climate: Traditionally, an area was classed as desert if it received less than 10 inches (250 millimetres) of rain annually. The country is crossed by the Tropic of Capricorn, but a cold current, called Benguela Current, flows along the coast, while the interior is occupied by a plateau. 33 . That knowledge can help them assess how plants and animals function in current and possible future climates. ! Avec 2,3 millions d'habitants en 2014 pour une superficie de 824 790 kilomètres carrés, la Namibie est un des territoires les plus faiblement peuplé d'Afrique, et dont la répartition de la population est très inégale, pour des raisons tant historiques que naturelles. News. THE HOTTEST PLACES on our earth. Elles augmentent à mesure que l'on avance dans les terres et atteignent 50 millimètres au pied de l'escarpement. Une brise marine venant du sud-ouest déplace cet air froid vers l'intérieur des terres. La température descend parfois au-dessous de 0 0C le long de la limite orientale du désert. Lixin Wang, left, and a colleague conduct water research in the Namib desert. Climate. The Namib Desert hardly gets any rain while Toronto gets a lot of rain compared to the Namib Desert. Ils sont séparés par un plateau central dont l'altitude est comprise entre 1000 et 2000m. URL : https://www.universalis.fr/encyclopedie/namib/, Encyclopædia Universalis - Contact - Mentions légales - Consentement RGPD, Consulter le dictionnaire de l'Encyclopædia Universalis. While Reykjavík on Iceland has mostly cloudy days, Sossusvlei in the Namib desert is one of the sunniest places on earth. Sand dunes surrounding Sossusvlei, the termination of the Tsauchab, an intermittent stream in south-central Namib, Namibia. Climate. Flowing north from the waters of the Antarctic is the powerful but cold Benguela Current. Maximum temperatures . The Namib is regarded as the world's oldest desert as it has experienced arid to semi-arid conditions for around 55 to 80 million years. The Namib Desert is southern Africa is a coastal desert. Internships. Sur la côte, l'amplitude thermique, diurne ou saisonnière, est très faible. 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