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Ténéré Desert
The Ténéré (Tuareg: Tenere, literally: "desert") is a desert region in the south central Sahara. It comprises a vast plain of sand stretching from northeastern Niger into western Chad, occupying an area of over . The Ténéré's boundaries are said to be the Aïr Mountains in the west, the Hoggar Mountains in the north, the Djado Plateau in the northeast, the Tibesti Mountains in the east, and the basin of Lake Chad in the south. The central part of the desert, the Erg du Bilma, is centred at approximately . It is the locus of the Neolithic Tenerian culture. Name The name ''Ténéré'' comes from the Tuareg language, meaning "desert", in much the same way that the Arabic word for "desert", ''Sahara'', came to be applied to the region as a whole. Climate The Ténéré has a hot desert climate (Köppen climate classification ''BWh''), typical of the large Sahara Desert. The climate is hyper-arid, extremely hot, sunny and dry year-round and there is virtually no plant life. The av ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desert
A desert is a barren area of landscape where little precipitation occurs and, consequently, living conditions are hostile for plant and animal life. The lack of vegetation exposes the unprotected surface of the ground to denudation. About one-third of the land surface of the Earth is arid or semi-arid. This includes much of the polar regions, where little precipitation occurs, and which are sometimes called polar deserts or "cold deserts". Deserts can be classified by the amount of precipitation that falls, by the temperature that prevails, by the causes of desertification or by their geographical location. Deserts are formed by weathering processes as large variations in temperature between day and night put strains on the rocks, which consequently break in pieces. Although rain seldom occurs in deserts, there are occasional downpours that can result in flash floods. Rain falling on hot rocks can cause them to shatter, and the resulting fragments and rubble strewn over the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neolithic
The Neolithic period, or New Stone Age, is an Old World archaeological period and the final division of the Stone Age. It saw the Neolithic Revolution, a wide-ranging set of developments that appear to have arisen independently in several parts of the world. This "Neolithic package" included the introduction of farming, domestication of animals, and change from a hunter-gatherer lifestyle to one of settlement. It began about 12,000 years ago when farming appeared in the Epipalaeolithic Near East, and later in other parts of the world. The Neolithic lasted in the Near East until the transitional period of the Chalcolithic (Copper Age) from about 6,500 years ago (4500 BC), marked by the development of metallurgy, leading up to the Bronze Age and Iron Age. In other places the Neolithic followed the Mesolithic (Middle Stone Age) and then lasted until later. In Ancient Egypt, the Neolithic lasted until the Protodynastic period, 3150 BC.Karin Sowada and Peter Grave. Egypt in th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blue Mountains (Niger)
The Blue Mountains (french: Montagnes Bleus, Tamasheq: ''Izouzaouene'', ''Izouzaoenehe'') are an outcrop off the northeastern section of the Aïr Massif in Niger, about 100 km ENE of the town of Iférouane and 30 km NE of the Tezerik oasis. Isolated from the main massif by dunes of the Erg Temet and a flat gravelly desert pavement plain, the rocky outcrop from the desert rises to a height of 924m, almost 300m over the surrounding topography. The area is in Aïr and Ténéré National Nature Reserve, which is a UNESCO World Heritage Site. The mountains themselves are also within the smaller Aïr and Ténéré Addax Sanctuary. They are characterised by cipollino marble outcroppings, which give the hills a bluish tint. Despite their relative remoteness, they became a tourist destination during the upsurge of desert tourism Tourism is travel for pleasure or business; also the theory and practice of touring, the business of attracting, accommodating, and entertainin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kaouar
The Kaouar (or Kawar) is a series of ten oases in the southern Sahara in northeast Niger, covering about from north to south, and east to west. They are on the eastern edge of the Ténéré desert, between the Tibesti Mountains in the east and the Aïr Mountains in the west and between the Fezzan in the north and Lake Chad in the south. They lie on the leeward side of a 100-meter-high north–south escarpment and easterly winds striking the escarpment provide easy access to groundwater for the oases. Running south to north, Bilma, Dirkou, Aney and Séguédine are the largest towns. The Kaouar oases are famous for salt and date production, and were along the route of the great Bornu to Fezzan caravan trail. This was the major point of contact between the African Sahel and the Mediterranean civilisations until the 19th century. Numerous archeological sites and rock paintings attest to human habitation here reaching back some 10,000 years to when the area was surrounded by l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Azalai
The Azalai (Tamasheq, var. Azalay) is a semi-annual salt caravan route practiced by Tuareg traders in the Sahara desert between Timbuktu and the Taoudenni salt mine in Mali, or the act of traveling with a caravan along that route. The other major West African salt caravan route, heading from around Agadez to Fachi and Bilma in Niger, is called Taghlamt (in Tamasheq, or Taglem or Tagalem in Hausa language). The two are among the last caravan routes in the Sahara that are still in use. Both caravans have largely been replaced by unpaved truck routes. Timbuktu-Taoudenni At one time the caravan route from Timbuktu extended through Taoudenni to Taghaza, another salt-mining site, and on to the lands north of the Sahara on the Mediterranean Sea. Caravans with up to 10,000 camels carried gold and slaves north, returning with manufactured goods and salt from Taghaza and Taoudenni. Until the 1940s, the Taoudenni caravans were made up of thousands of camels, departing Timbuktu at the be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Erg Of Bilma
The Erg of Bilma is a dune sea (Arabic: ''erg'') in the Ténéré desert region of the south central Sahara Desert. The Erg of Bilma stretches southwest from Fachi and the Tibesti Mountains. On the west it is bounded by the Aïr Mountains in north central Niger, and to the east it passes Bilma, continuing on to the Chadian border. It surrounds on three sides the oasis of Bilma, southernmost of a north–south string of oases of the Kaouar rise. The Erg covers an area of approximately . At its southernmost edge, some of the dunes have been stabilized by the growth of vegetation, allowing human cultivation of crops like millet and sorghum on the slopes. History The ancient Bornu Empire to Fezzan caravan routes had to cross the dunes of the erg south of Bilma as the last major obstacle before reaching the sahel. While that traffic largely ceased after 1820, trade though the erg of Bilma continues from the Lake Chad region and the Termit Massif on a small scale.. See also *List of e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sahara Desert
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Köppen Climate Classification
The Köppen climate classification is one of the most widely used climate classification systems. It was first published by German-Russian climatologist Wladimir Köppen (1846–1940) in 1884, with several later modifications by Köppen, notably in 1918 and 1936. Later, the climatologist Rudolf Geiger (1894–1981) introduced some changes to the classification system, which is thus sometimes called the Köppen–Geiger climate classification system. The Köppen climate classification divides climates into five main climate groups, with each group being divided based on seasonal precipitation and temperature patterns. The five main groups are ''A'' (tropical), ''B'' (arid), ''C'' (temperate), ''D'' (continental), and ''E'' (polar). Each group and subgroup is represented by a letter. All climates are assigned a main group (the first letter). All climates except for those in the ''E'' group are assigned a seasonal precipitation subgroup (the second letter). For example, ''Af'' indi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hot Desert Climate
The desert climate or arid climate (in the Köppen climate classification ''BWh'' and ''BWk''), is a dry climate sub-type in which there is a severe excess of evaporation over precipitation. The typically bald, rocky, or sandy surfaces in desert climates are dry and hold little moisture, quickly evaporating the already little rainfall they receive. Covering 14.2% of earth's land area, hot deserts are the second most common type of climate on earth after the polar climate. There are two variations of a desert climate according to the Köppen climate classification: a hot desert climate (''BWh''), and a cold desert climate (''BWk''). To delineate "hot desert climates" from "cold desert climates", there are three widely used isotherms: most commonly a mean annual temperature of , or sometimes the coldest month's mean temperature of , so that a location with a ''BW'' type climate with the appropriate temperature above whichever isotherm is being used is classified as "hot arid sub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
