Koulikoro Region ( Bambara : ߞߎߟߌߞߏߙߏ ߘߌߣߋߖߊ tr. Kulikoro Dineja) is a region in western Mali . It is the second administrative area of Mali and covers an area of 90,120 km. Its capital is the city of Koulikoro .
124-535: The region of Koulikoro is bordered by Mauritania on the north, the region of Kayes on the west, by Guinea and the region of Sikasso on the south, and by the region of Ségou to the east. In 2009 the Koulikoro Region had a population of 2,418,305. These were mainly Bambaras , Malinkés Sonikes and Somono [ fr ] around the Niger River . The region is irrigated by several rivers, including
248-515: A 52% majority. Many of Abdallahi's former supporters criticized this as a political ploy and refused to recognize the results. Despite complaints, the elections were almost unanimously accepted by Western, Arab and African countries, which lifted sanctions and resumed relations with Mauritania. By late summer, Abdel Aziz appeared to have secured his position and to have gained widespread international and internal support. Some figures, such as Senate chairman Messaoud Ould Boulkheir , continued to refuse
372-426: A consequence, the weather tends to be sunny, dry and stable with a minimal chance of rainfall. Subsiding, diverging, dry air masses associated with subtropical high-pressure systems are extremely unfavorable for the development of convectional showers. The subtropical ridge is the predominant factor that explains the hot desert climate ( Köppen climate classification BWh ) of this vast region. The descending airflow
496-515: A healthy adult. The Saharan silver ant is unique in that due to the extreme high temperatures of their habitat, and the threat of predators, the ants are active outside their nest for only about ten minutes per day. Dromedary camels and goats are the domesticated animals most commonly found in the Sahara. Because of its qualities of endurance and speed, the dromedary is the favourite animal used by nomads . Human activities are more likely to affect
620-530: A negligible player in the territorial dispute, with its official position being that it wishes for an expedient solution that is mutually agreeable to all parties. While most of Western Sahara has been occupied by Morocco, the UN still considers the Western Sahara a territory that needs to express its wishes with respect to statehood. A referendum, originally scheduled for 1992, is still supposed to be held at some point in
744-415: A result, Abdallahi formally resigned under protest, as it became clear that some opposition forces had defected from him and most international players, notably including France and Algeria, now aligned with Abdel Aziz. The United States continued to criticize the coup, but did not actively oppose the elections. Abdallahi's resignation allowed the election of Abdel Aziz as civilian president, on 18 July, by
868-558: A summer rainy season that extends across Africa from east to west. The southern limit of the Sahara is indicated botanically by the southern limit of Cornulaca monacantha (a drought-tolerant member of the Chenopodiaceae ), or northern limit of Cenchrus biflorus , a grass typical of the Sahel. According to climatic criteria, the southern limit of the Sahara corresponds to the 150 mm (5.9 in) isohyet of annual precipitation (this
992-542: A surface feature of Earth, with near-current technology. The Sahara is mainly rocky hamada (stone plateaus); ergs (sand seas – large areas covered with sand dunes ) form only a minor part, contrary to common misconception , but many of the sand dunes are over 180 metres (590 ft) high. Wind or rare rainfall shape the desert features: sand dunes, dune fields, sand seas, stone plateaus, gravel plains ( reg ), dry valleys ( wadi ), dry lakes ( oued ), and salt flats ( shatt or chott ). Unusual landforms include
1116-639: Is a long-term average, since precipitation varies annually). Important cities located in the Sahara include Nouakchott , the capital of Mauritania; Tamanrasset , Ouargla , Béchar , Hassi Messaoud , Ghardaïa , and El Oued in Algeria; Timbuktu in Mali; Agadez in Niger; Ghat in Libya; and Faya-Largeau in Chad. The Sahara is the world's largest hot desert . It is located in
1240-422: Is a north African gazelle that can also go for a long time without water. Other notable gazelles include the rhim gazelle and dama gazelle . The Saharan cheetah ( northwest African cheetah ) lives in Algeria, Togo , Niger, Mali, Benin , and Burkina Faso . There remain fewer than 250 mature cheetahs, which are very cautious, fleeing any human presence. The cheetah avoids the sun from April to October, seeking
1364-609: Is a prehistoric industry, or domain, that existed between 10,000 and 8,000 years ago in the Sahara, during the Neolithic Subpluvial . Human remains from this culture were found in 2000 at a site known as Gobero , located in Niger in the Ténéré Desert . The site is known as the largest and earliest grave of Stone Age people in the Sahara. The Kiffians were skilled hunters . Bones of many large savannah animals that were discovered in
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#17328558190431488-460: Is associated with high rates of wind-blown mineral dust, and these dust levels are found as expected in marine cores from the north tropical Atlantic. But around 12,500 BCE the amount of dust in the cores in the Bølling / Allerød phase suddenly plummets and shows a period of much wetter conditions in the Sahara, indicating a Dansgaard-Oeschger (DO) event (a sudden warming followed by a slower cooling of
1612-403: Is estimated to include five hundred species of plants, which is extremely low considering the huge extent of the area. Plants such as acacia trees, palms, succulents, spiny shrubs, and grasses have adapted to the arid conditions, by growing lower to avoid water loss by strong winds, by storing water in their thick stems to use it in dry periods, by having long roots that travel horizontally to reach
1736-632: Is known as the Char Bouba War . The invaders were led by the Beni Hassan tribe. The descendants of the Beni Hassan warriors became the upper stratum of Moorish society. Hassaniya , a bedouin Arabic dialect named for the Beni Hassan, became the dominant language among the largely nomadic population. Starting in the late 19th century, France laid claim to the territories of present-day Mauritania, from
1860-504: Is multiethnic; the Bidhan , or so-called "white moors", make up 30% of the population, while the Haratin , or so-called "black moors", comprise 40%. Both groups reflect a fusion of Arab-Berber ethnicity, language, and culture. The remaining 30% of the population comprises various sub-Saharan ethnic groups . Mauritania takes its name from the ancient Berber kingdom that flourished beginning in
1984-537: Is not known but the United Nations High Commissioner for Refugees (UNHCR) estimates that, as of June 1991, 52,995 Mauritanian refugees were living in Senegal and at least 13,000 in Mali. Opposition parties were legalized, and a new Constitution approved in 1991 which put an end to formal military rule. But President Ould Taya's election wins were dismissed as fraudulent by some opposition groups. In
2108-487: Is now Mauritania by beginning of the third century AD. Groups of Arab tribes migrated to this area in the late seventh century, bringing with them Islam, Arab culture, and the Arabic language. In the early 20th century, Mauritania was colonized by France as part of French West Africa . It achieved independence in 1960, but has since experienced recurrent coups and periods of military dictatorship. The 2008 Mauritanian coup d'état
2232-643: Is the strongest and the most effective over the eastern part of the Great Desert, in the Libyan Desert: this is the sunniest, driest and the most nearly "rainless" place on the planet, rivaling the Atacama Desert , lying in Chile and Peru . The rainfall inhibition and the dissipation of cloud cover are most accentuated over the eastern section of the Sahara rather than the western. The prevailing air mass lying above
2356-422: Is very unreliable and erratic in the Sahara as it may vary considerably year by year. In full contrast to the negligible annual rainfall amounts, the annual rates of potential evaporation are extraordinarily high, roughly ranging from 2,500 millimetres (100 in) per year to more than 6,000 millimetres (240 in) per year in the whole desert. Nowhere else on Earth has air been found as dry and evaporative as in
2480-535: The Adrar of Mauritania and a value of 75 °C (167 °F) has been measured in Borkou , northern Chad. Due to lack of cloud cover and very low humidity, the desert usually has high diurnal temperature variations between days and nights. However, it is a myth that the nights are especially cold after extremely hot days in the Sahara. On average, nighttime temperatures tend to be 13–20 °C (23–36 °F) cooler than in
2604-481: The Algerian Desert called Bou Bernous , at an elevation of 378 metres (1,240 ft) above sea level, and only Death Valley, California rivals it. Other hot spots in Algeria such as Adrar , Timimoun , In Salah , Ouallene , Aoulef , Reggane with an elevation between 200 and 400 metres (660 and 1,310 ft) above sea level get slightly lower summer average highs, around 46 °C (114.8 °F) during
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#17328558190432728-577: The Dakar-Niger railway . It is also an important port on the Niger River which makes it possible to serve the towns of Ségou , Mopti , Tombouctou and Gao . The area is served by the airport of Bamako-sénou. Agriculture remains the dominant economic activity, although several industries are present in the district, such as the Hydroelectric dam of Sélingué , gold-bearing industries around Kangaba , and
2852-623: The Islamic Republic of Mauritania , is a sovereign country in Northwest Africa . It is bordered by the Atlantic Ocean to the west, Western Sahara to the north and northwest, Algeria to the northeast , Mali to the east and southeast , and Senegal to the southwest . By land area Mauritania is the 11th-largest country in Africa and 28th-largest in the world; 90% of its territory is in
2976-742: The Late Pleistocene Iberomaurusians , early Holocene Capsians , and mid-Holocene Mechta groups, whereas the Tenerian crania are more like those of Mediterranean groups. Graves show that the Tenerians observed spiritual traditions, as they were buried with artifacts such as jewelry made of hippo tusks and clay pots. The most interesting find is a triple burial, dated to 5300 years ago, of an adult female and two children, estimated through their teeth as being five and eight years old, hugging each other. Pollen residue indicates they were buried on
3100-570: The Military Committee for National Salvation . The energetic Colonel Mohamed Khouna Ould Haidallah soon emerged as its strongman. By giving up all claims to Western Sahara, he found peace with the Polisario and improved relations with its main backer, Algeria, but relations with Morocco, the other party to the conflict, and its European ally France, deteriorated. Instability continued, and Haidallah's ambitious reform attempts foundered. His regime
3224-808: The Nile Valley in Egypt and the Sudan . It stretches from the Red Sea in the east and the Mediterranean in the north to the Atlantic Ocean in the west, where the landscape gradually changes from desert to coastal plains. To the south it is bounded by the Sahel , a belt of semi-arid tropical savanna around the Niger River valley and the Sudan region of sub-Saharan Africa . The Sahara can be divided into several regions, including
3348-723: The Richat Structure in Mauritania. Several deeply dissected mountains, many volcanic, rise from the desert, including the Aïr Mountains , Ahaggar Mountains , Saharan Atlas , Tibesti Mountains , Adrar des Iforas , and the Red Sea Hills . The highest peak in the Sahara is Emi Koussi , a shield volcano in the Tibesti range of northern Chad. The central Sahara is hyperarid , with sparse vegetation. The northern and southern reaches of
3472-598: The Sahara . Most of its population of some 4.3 million lives in the temperate south of the country, with roughly a third concentrated in the capital and largest city, Nouakchott , on the Atlantic coast. The country's name derives from Mauretania , the Latin name for a region in the ancient Maghreb . It extended from central present-day Algeria to the Atlantic . Berbers occupied what
3596-660: The Senegal River area northwards. In 1901, Xavier Coppolani took charge of the imperial mission. Through a combination of strategic alliances with Zawaya tribes and military pressure on the Hassane warrior nomads, he managed to extend French rule over the Mauritanian emirates . Beginning in 1903 and 1904, the French armies succeeded in occupying Trarza , Brakna , and Tagant , but the northern emirate of Adrar held out longer, aided by
3720-544: The cotton production site in Fana , Mali's second largest. The Koulikoro Region is divided into seven cercles encompassing 106 communes : Mali's capital ( Bamako ) is located in the heart of the region, but forms a separate administrative entity called the Bamako Capital District; it is entirely surrounded by Kati Cercle. Mauritania This is an accepted version of this page Mauritania , formally
3844-474: The horse latitudes under the subtropical ridge , a significant belt of semi-permanent subtropical warm-core high pressure where the air from the upper troposphere usually descends, warming and drying the lower troposphere and preventing cloud formation. The permanent absence of clouds allows unhindered light and thermal radiation. The stability of the atmosphere above the desert prevents any convective overturning, thus making rainfall virtually non-existent. As
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3968-536: The southern part of Western Sahara , framed as an attempt to create a " Greater Mauritania ". Col. Mustafa Ould Salek 's Military Committee for National Recovery junta proved incapable of either establishing a strong base of power or extracting the country from its destabilizing conflict with the Sahrawi resistance movement, the Polisario Front . It quickly fell, to be replaced by another military government,
4092-499: The African continent. If all areas with a mean annual precipitation of less than 250 mm (9.8 in) were included, the Sahara would be 11 million square kilometres (4,200,000 sq mi). It is one of three distinct physiographic provinces of the African massive physiographic division . The Sahara is so large and bright that, in theory, it could be detected from other stars as
4216-417: The African humid period. At its largest extent, sometime before 5000 BCE, Lake Mega-Chad was the largest of four Saharan paleolakes, and is estimated to have covered an area of 350,000 km . The Sahara pump theory describes this cycle. During periods of a wet or " Green Sahara ", the Sahara becomes a savanna grassland and various flora and fauna become more common. Following inter-pluvial arid periods,
4340-448: The BASEP (Presidential Security Battalion) came to our home and took away my father." The coup plotters, all dismissed in a presidential decree shortly beforehand, included Ould Abdel Aziz, General Muhammad Ould Al-Ghazwani , General Philippe Swikri, and Brigadier General (Aqid) Ahmed Ould Bakri. A Mauritanian lawmaker, Mohammed Al Mukhtar, claimed that many of the country's people supported
4464-608: The Berber peoples of the kingdom, the Mauri people . The word "Mauri" is also the root of the name for the Moors . It was more commonly known to Arab geographers as Bilad Chinqit, "the land of the Chinguetti". The term "Mauritanie occidentale" was officially used in a ministerial circular in 1899, based on a proposal by Xavier Coppolani , a French military and colonial leader, who was instrumental in
4588-471: The Canary Islands, i.e. Europe. The UN estimated that 150,000 people from Mali had fled to Maritania. Sahara The Sahara ( / s ə ˈ h ɑːr ə / , / s ə ˈ h ær ə / ) is a desert spanning across North Africa . With an area of 9,200,000 square kilometres (3,600,000 sq mi), it is the largest hot desert in the world and the third-largest desert overall, smaller only than
4712-412: The Great Desert the hottest large region in the world, and the hottest place on Earth during summer in some spots. The average high temperature exceeds 38 to 40 °C (100.4 to 104.0 °F) during the hottest month nearly everywhere in the desert except at very high altitudes. The world's highest officially recorded average daily high temperature was 47 °C (116.6 °F) in a remote desert town in
4836-462: The Halpularen ethnic group. The tension culminated in an international airlift agreed to by Senegal and Mauritania under international pressure to prevent further violence. The Mauritanian Government expelled thousands of black Mauritanians. Most of these so-called 'Senegalese' had few or no ties with Senegal, and many have been repatriated from Senegal and Mali after 2007. The exact number of expulsions
4960-474: The Intertropical Convergence Zone from the south and the annual average rainfall ranges from 100 millimetres (4 in) to 250 millimetres (10 in). For example, Timbuktu, Mali and Agadez , Niger are found in this zone. The vast central hyper-arid core of the desert is virtually never affected by northerly or southerly atmospheric disturbances and permanently remains under the influence of
5084-513: The Kiffian culture do not exist after 8,000 years ago, as the Sahara went through a dry period for the next thousand years. After this time, the Tenerian culture colonized the area. Gobero was discovered in 2000 during an archaeological expedition led by Paul Sereno , which sought dinosaur remains. Two distinct prehistoric cultures were discovered at the site: the early Holocene Kiffian culture, and
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5208-592: The Mauritanian Army and head of the presidential guard, who had recently been fired. Mauritania's presidential spokesman, Abdoulaye Mamadouba, said the President, Prime Minister, and Interior Minister had been arrested by renegade senior Mauritanian army officers and were being held under house arrest at the presidential palace in the capital. In the apparently successful and bloodless coup, Abdallahi's daughter, Amal Mint Cheikh Abdallahi, said: "The security agents of
5332-463: The Niger, Baoulé, Sankarani , Baogé, Bani and Bafing . The climate of the region's south has the high rainfall typical of the Sudan , while north of the Kita-Bamako axis, it tends to a Sahelian aridity. The largest cities of the region are Kati , Koulikoro , Kolokani , Nara , Banamba and Dioïla ; however the most populous commune is Kalabancoro . The Boucle du Baoulé National Park and
5456-455: The Sahara (birds in particular) such as African silverbill and black-faced firefinch , among others. There are also small desert crocodiles in Mauritania and the Ennedi Plateau of Chad. The deathstalker scorpion can be 10 cm (3.9 in) long. Its venom contains large amounts of agitoxin and scyllatoxin and is very dangerous; however, a sting from this scorpion rarely kills
5580-465: The Sahara area then reverts to desert conditions and the flora and fauna are forced to retreat northwards to the Atlas Mountains , southwards into West Africa , or eastwards into the Nile Valley . This separates populations of some of the species in areas with different climates , forcing them to adapt , possibly giving rise to allopatric speciation . It is also proposed that humans accelerated
5704-514: The Sahara is strongly influenced by the North Atlantic Oscillation (NAO), with warmer winter temperatures during negative NAO events and cooler winters with more frosts when the NAO is positive. This is because the weaker clockwise flow around the eastern side of the subtropical anticyclone during negative NAO winters, although too dry to produce more than negligible precipitation, does reduce
5828-497: The Sahara is the continental tropical (cT) air mass, which is hot and dry. Hot, dry air masses primarily form over the North-African desert from the heating of the vast continental land area, and it affects the whole desert during most of the year. Because of this extreme heating process, a thermal low is usually noticed near the surface, and is the strongest and the most developed during the summertime. The Sahara High represents
5952-616: The Sahara region. However, at least two instances of snowfall have been recorded in Sahara, in February 1979 and December 2016, both in the town of Ain Sefra . One theory for the formation of the Sahara is that the monsoon in Northern Africa was weakened because of glaciation during the Quaternary period, starting two or three million years ago. Another theory is that the monsoon was weakened when
6076-635: The Sahara to the Iberian Peninsula in Europe. According to a disputed Arab tradition the Almoravids traveled south and conquered the ancient and extensive Ghana Empire around 1076. From 1644 to 1674 the indigenous peoples of the area that is modern Mauritania made what became their final effort to repel the Yemeni Maqil Arabs who were invading their territory. This effort, which was unsuccessful,
6200-698: The Tassili n'Ajjer in southeast Algeria. Fossils of dinosaurs , including Afrovenator , Jobaria and Ouranosaurus , have also been found here. The modern Sahara, though, is not lush in vegetation, except in the Nile Valley, at a few oases , and in the northern highlands, where Mediterranean plants such as the olive tree are found to grow. Shifts in Earth's axis increased temperatures and decreased precipitation, which caused an abrupt beginning of North Africa desertification about 5,400 years ago. The Kiffian culture
6324-588: The US and Europe. It was rewarded with diplomatic normalization and aid projects. On 28 October 1999, Mauritania joined Egypt, Palestine, and Jordan as the only members of the Arab League to officially recognize Israel . Ould Taya also started co-operating with the United States in anti-terrorism activities, a policy that was criticized by some human rights organizations. (See also Foreign relations of Mauritania .) During
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#17328558190436448-418: The Western Sahara conflict has been, since the 1980s, one of strict neutrality. The Mauritania–Senegal Border War started as a result of a conflict in Diawara between Moorish Mauritanian herders and Senegalese farmers over grazing rights. On 9 April 1989, Mauritanian guards killed two Senegalese. Following the incident, several riots erupted in Bakel , Dakar and other towns in Senegal, directed against
6572-412: The amount of rainfall received – the Northern (Mediterranean), Central and Southern Zones. There are two transitional zones – the Mediterranean-Sahara transition and the Sahel transition zone. The Saharan flora comprises around 2800 species of vascular plants . Approximately a quarter of these are endemic . About half of these species are common to the flora of the Arabian deserts. The central Sahara
6696-422: The ancient Tethys Sea dried up during the Tortonian period around 7 million years ago. The climate of the Sahara has undergone enormous variations between wet and dry over the last few hundred thousand years, believed to be caused by long-term changes in the North African climate cycle that alters the path of the North African Monsoon – usually southward. The cycle is caused by a 41,000-year cycle in which
6820-474: The anticolonial rebellion (or jihad ) of shaykh Maa al-Aynayn and by insurgents from Tagant and the other occupied regions. In 1904, France organized the territory of Mauritania, and it became part of French West Africa , first as a protectorate and later as a colony. In 1912, the French armies defeated Adrar, and incorporated it into the territory of Mauritania. French rule brought legal prohibitions against slavery and an end to interclan warfare. During
6944-408: The area is strongly Islamized , but the practices of animists remain very present in the villages. Bambara serves as the area's most common language. Koulikoro is famous for its traditional puppet theater, showcased in many festivals such as in the village of Diarabougou. Several musicians are natives of the region, including Salif Keita and Rokia Traoré . Koulikoro is the terminus of
7068-421: The atmospheric circulation itself, the desert is made even drier by its geographical configuration and location. Indeed, the extreme aridity of the Sahara is not only explained by the subtropical high pressure: the Atlas Mountains of Algeria, Morocco and Tunisia also help to enhance the aridity of the northern part of the desert. These major mountain ranges act as a barrier, causing a strong rain shadow effect on
7192-509: The capital Nouakchott . The coup proceeded without loss of life. Calling themselves the Military Council for Justice and Democracy , the officers released the following statement: The national armed forces and security forces have unanimously decided to put a definitive end to the oppressive activities of the defunct authority, which our people have suffered from during the past years. The Military Council later issued another statement naming Colonel Ould Mohamed Vall as president and director of
7316-448: The climate). The moister Saharan conditions had begun about 12,500 BCE, with the extension of the ITCZ northward in the northern hemisphere summer, bringing moist wet conditions and a savanna climate to the Sahara, which (apart from a short dry spell associated with the Younger Dryas ) peaked during the Holocene thermal maximum climatic phase at 4000 BCE when mid-latitude temperatures seem to have been between 2 and 3 degrees warmer than in
7440-420: The colonial occupation and creation of modern-day Mauritania. This term, employed by the French, gradually replaced other designations previously used for referring to the country. The ancient tribes of Mauritania were Berber , Niger-Congo , and Bafour peoples. The Bafour were among the first Saharan peoples to abandon their previously nomadic lifestyle and adopt a primarily agricultural one. In response to
7564-435: The colonial period 90% of the population remained nomadic. Gradually many individuals belonging to sedentary peoples, whose ancestors had been expelled centuries earlier, began to migrate into Mauritania. Until 1902, the capital of French West Africa was in modern-day Senegal. It was first established at Saint-Louis and later, from 1902 to 1960, in Dakar. When Senegal gained its independence that year, France chose Nouakchott as
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#17328558190437688-502: The country (or 2.1% of the population). . Despite an abundance of natural resources, including iron ore and petroleum, Mauritania remains poor; its economy is based primarily on agriculture, livestock, and fishing. Mauritania is culturally and politically part of the Arab world ; it is a member of the Arab League and Arabic is the official language. The official religion is Islam , and almost all inhabitants are Sunni Muslims . Despite its prevailing Arab identity , Mauritanian society
7812-480: The country's sacrifice and defense. In late 2018, Mauritania bribed members of the EU parlament ( Antonio Panzeri ) to "not speak ill of Mauritania" in what became known as the Qatar corruption scandal at the European Parliament . In August 2019 Mohamed Ould Ghazouani was sworn in as president after the 2019 elections , which were considered Mauritania's first peaceful transition of power since independence. In June 2021 former president Mohamed Ould Abdel Aziz
7936-474: The daytime. The smallest variations are found along the coastal regions due to high humidity and are often even lower than a 10 °C (18 °F) difference, while the largest variations are found in inland desert areas where the humidity is the lowest, mainly in the southern Sahara. Still, it is true that winter nights can be cold, as it can drop to the freezing point and even below, especially in high-elevation areas. The frequency of subfreezing winter nights in
8060-469: The desert experiences around three to five months when the average high strictly exceeds 40 °C (104 °F); while in the southern central part of the desert, there are up to six or seven months when the average high temperature strictly exceeds 40 °C (104 °F). Some examples of this are Bilma , Niger and Faya-Largeau, Chad. The annual average daily temperature exceeds 20 °C (68 °F) everywhere and can approach 30 °C (86 °F) in
8184-405: The desert, along with the highlands, have areas of sparse grassland and desert shrub , with trees and taller shrubs in wadis , where moisture collects. In the central, hyperarid region, there are many subdivisions of the great desert: Tanezrouft , the Ténéré , the Libyan Desert , the Eastern Desert , the Nubian Desert and others. These extremely arid areas often receive no rain for years. To
8308-407: The deserts of Antarctica and the northern Arctic . The name "Sahara" is derived from Arabic : صَحَارَى , romanized : ṣaḥārā /sˤaħaːraː/ , a broken plural form of ṣaḥrā' ( صَحْرَاء /sˤaħraːʔ/ ), meaning "desert". The desert covers much of North Africa , excluding the fertile region on the Mediterranean Sea coast, the Atlas Mountains of the Maghreb , and
8432-475: The drying-out period from 6000 to 2500 BCE by pastoralists overgrazing available grassland. The growth of speleothems (which requires rainwater) was detected in Hol-Zakh, Ashalim , Even-Sid, Ma'ale-ha-Meyshar, Ktora Cracks, Nagev Tzavoa Cave, and elsewhere, and has allowed tracking of prehistoric rainfall. The Red Sea coastal route was extremely arid before 140 and after 115 kya (thousands of years ago). Slightly wetter conditions appear at 90–87 kya, but it still
8556-477: The eastern continental extension of the Azores High , centered over the North Atlantic Ocean . The subsidence of the Sahara High nearly reaches the ground during the coolest part of the year, while it is confined to the upper troposphere during the hottest periods. The effects of local surface low pressure are extremely limited because upper-level subsidence still continues to block any form of air ascent. Also, to be protected against rain-bearing weather systems by
8680-486: The edge of the desert thousands of years ago, since the end of the last glacial period . In the Central Sahara, engraved and painted rock art were created perhaps as early as 10,000 years ago, spanning the Bubaline Period , Kel Essuf Period , Round Head Period , Pastoral Period , Caballine Period , and Cameline Period . The Sahara was then a much wetter place than it is today. Over 30,000 petroglyphs of river animals such as crocodiles survive, with half found in
8804-473: The education system. This was also a reaction to the consequences of the French domination under the colonial rule. Various models for maintaining the country's cultural diversity have been suggested, but none have been successfully implemented. This ethnic discord was evident during intercommunal violence that broke out in April 1989 (the " Mauritania–Senegal Border War "), but has since subsided. Mauritania expelled some 70,000 sub-Saharan African Mauritanians in
8928-476: The flow of dry, cold air from higher latitudes of Eurasia into the Sahara significantly. The average annual rainfall ranges from very low in the northern and southern fringes of the desert to nearly non-existent over the central and the eastern part. The thin northern fringe of the desert receives more winter cloudiness and rainfall due to the arrival of low pressure systems over the Mediterranean Sea along
9052-554: The future, under UN auspices, to determine whether or not the indigenous Sahrawis wish to be independent, as the Sahrawi Arab Democratic Republic , or to be part of Morocco. In 1960, Mauritania became an independent nation. In 1964 President Moktar Ould Daddah , originally installed by the French, formalized Mauritania as a one-party state with a new constitution , setting up an authoritarian presidential regime. Daddah's own Parti du Peuple Mauritanien became
9176-574: The gradual desiccation of the Sahara, they eventually migrated southward. Many of the Berber tribes have claimed to have Yemeni (and sometimes other Arab) origins. Little evidence supports those claims, although a 2000 DNA study of the Yemeni people suggested some ancient connection might exist between the peoples. The Umayyads were the first Arab Muslims to enter Mauritania. During the Islamic conquests , they made incursions into Mauritania and were present in
9300-699: The habitat in areas of permanent water (oases) or where water comes close to the surface. Here, the local pressure on natural resources can be intense. The remaining populations of large mammals have been greatly reduced by hunting for food and recreation. In recent years development projects have started in the deserts of Algeria and Tunisia using irrigated water pumped from underground aquifers. These schemes often lead to soil degradation and salinization . Researchers from Hacettepe University have reported that Saharan soil may have bio-available iron and also some essential macro and micro nutrient elements suitable for use as fertilizer for growing wheat. People lived on
9424-405: The highest recorded worldwide. The sky is usually clear above the desert, and the sunshine duration is extremely high everywhere in the Sahara. Most of the desert has more than 3,600 hours of bright sunshine per year (over 82% of daylight hours), and a wide area in the eastern part has over 4,000 hours of bright sunshine per year (over 91% of daylight hours). The highest values are very close to
9548-543: The hottest months of the year. Salah, well known in Algeria for its extreme heat, has average high temperatures of 43.8 °C (110.8 °F), 46.4 °C (115.5 °F), 45.5 °C (113.9 °F) and 41.9 °C (107.4 °F) in June, July, August and September respectively. There are even hotter spots in the Sahara, but they are located in extremely remote areas, especially in the Azalai , lying in northern Mali. The major part of
9672-485: The hottest regions year-round. However, most of the desert has a value in excess of 25 °C (77 °F). Sand and ground temperatures are even more extreme. During daytime, the sand temperature is extremely high: it can easily reach 80 °C (176 °F) or more. A sand temperature of 83.5 °C (182.3 °F) has been recorded in Port Sudan . Ground temperatures of 72 °C (161.6 °F) have been recorded in
9796-406: The last glacial period , the Sahara was much larger than it is today, extending south beyond its current boundaries. The end of the glacial period brought more rain to the Sahara, from about 8000 BCE to 6000 BCE, perhaps because of low pressure areas over the collapsing ice sheets to the north. Once the ice sheets were gone, the northern Sahara dried out. In the southern Sahara, the drying trend
9920-401: The late 1980s Ould Taya had established close co-operation with Iraq , and pursued a strongly Arab nationalist line. Mauritania grew increasingly isolated internationally, and tensions with Western countries grew dramatically after it took a pro-Iraqi position during the 1991 Gulf War . During the mid-to late 1990s, Mauritania shifted its foreign policy to one of increased co-operation with
10044-433: The late 1980s. Ethnic tensions and the sensitive issue of slavery – past and, in some areas, present – are still powerful themes in the country's political debate. A significant number from all groups seek a more diverse, pluralistic society. The International Court of Justice concluded that in spite of some evidence of both Morocco's and Mauritania's legal ties prior to Spanish colonization, neither set of ties
10168-458: The late nineteenth century, The hypothesis was later formally proposed and tested by the meteorologist John Kutzbach in 1981. Kutzbach's ideas about the impacts of insolation on global monsoonal patterns have become widely accepted today as the underlying driver of long-term monsoonal cycles. Kutzbach never formally named his hypothesis and as such it is referred to here as the " Orbital Monsoon Hypothesis " as suggested by Ruddiman in 2001. During
10292-518: The leeward side by dropping much of the humidity brought by atmospheric disturbances along the polar front which affects the surrounding Mediterranean climates. The primary source of rain in the Sahara is the Intertropical Convergence Zone , a continuous belt of low-pressure systems near the equator which bring the brief, short and irregular rainy season to the Sahel and southern Sahara. Rainfall in this giant desert has to overcome
10416-494: The mainly Arabized Mauritanians who dominated the local retail business. The rioting, adding to already existing tensions, led to a campaign of terror against black Mauritanians, who are often seen as 'Senegalese' by the Bidān (White Moors), regardless of their nationality. As low scale conflict with Senegal continued into 1990/91, the Mauritanian government engaged in or encouraged acts of violence and seizures of property directed against
10540-419: The maximum area of water and to find any surface moisture, and by having small thick leaves or needles to prevent water loss by evapotranspiration . Plant leaves may dry out totally and then recover. Several species of fox live in the Sahara including: the fennec fox , pale fox and Rüppell's fox . The addax , a large white antelope , can go nearly a year in the desert without drinking. The dorcas gazelle
10664-437: The middle Holocene Tenerian culture . The post-Kiffian desiccation lasted until around 4600 BCE, when the earliest artefacts associated with the Tenerians have been dated to. Some 200 skeletons have been discovered at Gobero. The Tenerians were considerably shorter in height and less robust than the earlier Kiffians. Craniometric analysis also indicates that they were osteologically distinct. The Kiffian skulls are akin to those of
10788-486: The military junta organizing elections within a promised two-year timeline. In a referendum on 26 June 2006, 97% of Mauritanians approved a new constitution that limited the duration of a president's stay in office. The leader of the junta , Col. Vall, promised to abide by the referendum and relinquish power peacefully. Mauritania's establishment of relations with Israel – it was one of only three Arab states to recognize Israel – was maintained by
10912-468: The military coup in 2005. This was the first time since Mauritania gained independence in 1960 that it elected a president in a multi-candidate election. The elections were won in a second round of voting by Sidi Ould Cheikh Abdallahi , with Ahmed Ould Daddah a close second. On 6 August 2008 the head of the presidential guards took over the president's palace in Nouakchott, a day after 48 lawmakers from
11036-457: The national police force, the Sûreté Nationale . Vall, once regarded as a firm ally of the now-ousted president, had aided Ould Taya in the coup that had originally brought him to power, and had later served as his Security Chief. Sixteen other officers were listed as members of the council. Though cautiously watched by the international community, the coup came to be generally accepted, with
11160-766: The natural reserves of Fina, Kongossambougou and Badinko shelter a diversity of wildlife. The region of Koulikoro is the seat of several great empires which followed one another in Mali: the Ghana Empire , the Sosso Empire and the Mali Empire . The land of the Manding (or Mandé) is located in this area. It is the cradle of the Empire of Mali and known for preserving its traditional culture with its griots and its hunters. Like much of Mali,
11284-549: The new order and call for Abdel Aziz's resignation. In February 2011 the waves of the Arab Spring spread to Mauritania, where thousands of people took to the streets of the capital. In November 2014 Mauritania was invited as a non-member guest nation to the G20 summit in Brisbane . The national flag of Mauritania was changed on 5 August 2017. Two red stripes were added as a symbol of
11408-535: The new regime, despite widespread criticism from the opposition. They considered that position as a legacy of the Taya regime's attempts to curry favor with the West. Parliamentary and municipal elections in Mauritania took place on 19 November and 3 December 2006. Mauritania's first fully democratic presidential elections took place on 11 March 2007. The elections effected the final transfer from military to civilian rule following
11532-650: The new state. At the same time, the French were militarily suppressing the most intransigent Hassane tribes in the north. French pressure on those tribes altered the existing balance of power, and new conflicts arose between the southern populations and the Moors. The great Sahel droughts of the early 1970s caused massive devastation in Mauritania, exacerbating problems of poverty and conflict. The arabized dominant elites reacted to changing circumstances, and to Arab nationalist calls from abroad, by increasing pressure to arabize many aspects of Mauritanian life, such as law and
11656-671: The north, the Sahara skirts the Mediterranean Sea in Egypt and portions of Libya, but in Cyrenaica and the Maghreb , the Sahara borders the Mediterranean forest, woodland, and scrub eco-regions of northern Africa, all of which have a Mediterranean climate characterized by hot summers and cool and rainy winters. According to the botanical criteria of Frank White and geographer Robert Capot-Rey,
11780-472: The northern limit of the Sahara corresponds to the northern limit of date palm cultivation and the southern limit of the range of esparto , a grass typical of the Mediterranean climate portion of the Maghreb and Iberia . The northern limit also corresponds to the 100 mm (3.9 in) isohyet of annual precipitation. To the south, the Sahara is bounded by the Sahel, a belt of dry tropical savanna with
11904-455: The opposite is true, with decreased annual precipitation and less vegetation resulting in a phase of the Sahara climate cycle known as the "desert Sahara". The idea that changes in insolation (solar heating) caused by long-term changes in Earth's orbit are a controlling factor for the long-term variations in the strength of monsoon patterns across the globe was first suggested by Rudolf Spitaler in
12028-419: The physical and atmospheric barriers that normally prevent the production of precipitation. The harsh climate of the Sahara is characterized by: extremely low, unreliable, highly erratic rainfall; extremely high sunshine duration values; high temperatures year-round; negligible rates of relative humidity ; a significant diurnal temperature variation ; and extremely high levels of potential evaporation which are
12152-401: The polar front, although very attenuated by the rain shadow effects of the mountains and the annual average rainfall ranges from 100 millimetres (4 in) to 250 millimetres (10 in). For example, Biskra , Algeria, and Ouarzazate , Morocco, are found in this zone. The southern fringe of the desert along the border with the Sahel receives summer cloudiness and rainfall due to the arrival of
12276-518: The recent past. Analysis of Nile River deposited sediments in the delta also shows this period had a higher proportion of sediments coming from the Blue Nile , suggesting higher rainfall also in the Ethiopian Highlands . This was caused principally by a stronger monsoonal circulation throughout the sub-tropical regions, affecting India, Arabia and the Sahara. Lake Victoria only recently became
12400-508: The regime of President Ould Taya Mauritania developed economically, oil was discovered in 2001 by the Woodside Company. On 3 August 2005 a military coup led by Colonel Ely Ould Mohamed Vall ended President Maaouya Ould Sid'Ahmed Taya 's twenty-one years of rule. Taking advantage of Ould Taya's attendance at the funeral of Saudi King Fahd , the military, including members of the presidential guard (BASEP), seized control of key points in
12524-653: The region by the end of the seventh century. Many Berber tribes in Mauritania fled the arrival of the Arabs to the Gao region in Mali . Other peoples also migrated south past the Sahara and into West Africa. In the 11th century, several nomadic Berber confederations in the desert regions overlapping present-day Mauritania joined together to form the Almoravid movement. They expanded north and south, spawning an important empire that stretched from
12648-444: The release of Abdallahi, who was instead placed under house arrest in his home village. The new government broke off relations with Israel. After the coup Abdel Aziz insisted on holding new presidential elections to replace Abdallahi, but was forced to reschedule them due to internal and international opposition. During the spring of 2009, the junta negotiated an understanding with some opposition figures and international parties. As
12772-407: The ruling organization in a one-party system . The President justified this on the grounds that Mauritania was not ready for western style multiparty democracy . Under this one-party constitution, Daddah was re-elected in uncontested elections in 1976 and 1978. Daddah was ousted in a bloodless coup on 10 July 1978. He had brought the country to near-collapse through the disastrous war to annex
12896-471: The ruling party resigned in protest of President Abdallahi's policies. The Army surrounded key government facilities, including the state television building, after the president fired senior officers, one of them the head of the presidential guards. The President, Prime Minister Yahya Ould Ahmed Waghef , and Mohamed Ould R'zeizim, Minister of Internal Affairs, were arrested. The coup was coordinated by General Mohamed Ould Abdel Aziz , former chief of staff of
13020-587: The same area suggest that they lived on the shores of a lake that was present during the Holocene Wet Phase, a period when the Sahara was verdant and wet. The Kiffian people were tall, standing over six feet in height. Craniometric analysis indicates that this early Holocene population was closely related to the Late Pleistocene Iberomaurusians and early Holocene Capsians of the Maghreb, as well as mid-Holocene Mechta groups. Traces of
13144-459: The scale of the Nile floods between 2700 and 2100 BCE. The Sahara comprises several distinct ecoregions . With their variations in temperature, rainfall, elevation, and soil, these regions harbor distinct communities of plants and animals. The flora of the Sahara is highly diversified based on the bio-geographical characteristics of this vast desert. Floristically , the Sahara has three zones based on
13268-521: The shelter of shrubs such as balanites and acacias. They are unusually pale. The other cheetah subspecies ( northeast African cheetah ) lives in Chad, Sudan and the eastern region of Niger. However, it is currently extinct in the wild in Egypt and Libya. There are approximately 2000 mature individuals left in the wild. Other animals include the monitor lizards , hyrax , sand vipers , and small populations of African wild dog , in perhaps only 14 countries and red-necked ostrich . Other animals exist in
13392-467: The site of the new capital of Mauritania. At the time, Nouakchott was little more than a fortified village (or ksar ). After Mauritanian independence, larger numbers of indigenous sub-Saharan African peoples ( Haalpulaar , Soninke , and Wolof ) migrated into it, most of them settling in the area north of the Senegal River . Many of these new arrivals had been educated in the French language and customs, and became clerks, soldiers, and administrators in
13516-620: The source of the White Nile and dried out almost completely around 15 kya. The sudden subsequent movement of the ITCZ southwards with a Heinrich event (a sudden cooling followed by a slower warming), linked to changes with the El Niño-Southern Oscillation cycle, led to a rapid drying out of the Saharan and Arabian regions, which quickly became desert. This is linked to a marked decline in
13640-561: The strongest anticyclonic weather regime, and the annual average rainfall can drop to less than 1 millimetre (0.04 in). In fact, most of the Sahara receives less than 20 millimetres (0.8 in). Of the 9,000,000 square kilometres (3,500,000 sq mi) of desert land in the Sahara, an area of about 2,800,000 square kilometres (1,100,000 sq mi) (about 31% of the total area) receives an annual average rainfall amount of 10 millimetres (0.4 in) or less, while some 1,500,000 square kilometres (580,000 sq mi) (about 17% of
13764-517: The takeover of a government that had become "an authoritarian regime" under a president who had "marginalized the majority in parliament". However, Abdel Aziz's regime was isolated internationally, and became subject to diplomatic sanctions and the cancellation of some aid projects. Domestically, a group of parties coalesced around Abdallahi to continue protesting the coup, which caused the junta to ban demonstrations and crack down on opposition activists. International and internal pressure eventually forced
13888-595: The theoretical maximum value. A value of 4300 hours (98%) of the time would be recorded in Upper Egypt ( Aswan , Luxor ) and in the Nubian Desert ( Wadi Halfa ). The annual average direct solar irradiation is around 2,800 kWh/(m year) in the Great Desert. The Sahara has a huge potential for solar energy production. The high position of the Sun, the extremely low relative humidity, and the lack of vegetation and rainfall make
14012-505: The third century BC and later became the Roman province of Mauretania , which flourished into the seventh century AD. The two territories do not overlap, though; historical Mauretania was considerably farther north than modern Mauritania, as it was spread out along the entire western half of the Mediterranean coast of Africa. The term "Mauretania", in turn, derives from the Greek and Roman exonym for
14136-465: The tilt of the earth changes between 22° and 24.5°. At present, it is in a dry period, but it is expected that the Sahara will become green again in 15,000 years. When the North African monsoon is at its strongest, annual precipitation and subsequent vegetation in the Sahara region increase, resulting in conditions commonly referred to as the " green Sahara ". For a relatively weak North African monsoon,
14260-478: The total area) receives an average of 5 millimetres (0.2 in) or less. The annual average rainfall is virtually zero over a wide area of some 1,000,000 square kilometres (390,000 sq mi) in the eastern Sahara comprising deserts of: Libya, Egypt and Sudan ( Tazirbu , Kufra , Dakhla , Kharga , Farafra , Siwa , Asyut , Sohag , Luxor, Aswan, Abu Simbel , Wadi Halfa) where the long-term mean approximates 0.5 millimetres (0.02 in) per year. Rainfall
14384-899: The western Sahara, the central Ahaggar Mountains , the Tibesti Mountains , the Aïr Mountains , the Ténéré desert, and the Libyan Desert . For several hundred thousand years, the Sahara has alternated between desert and savanna grassland in a 20,000-year cycle caused by the precession of Earth's axis (about 26,000 years) as it rotates around the Sun, which changes the location of the North African monsoon . The Sahara covers large parts of Algeria , Chad , Egypt , Libya , Mali , Mauritania , Niger , Western Sahara and Sudan , and parts of southern Morocco and Tunisia . It covers 9 million square kilometres (3,500,000 sq mi), 31% of
14508-555: Was arrested amidst a corruption probe into allegations of embezzlement. In December 2023, Aziz was sentenced to 5 years in prison for corruption. In January and February 2024 there was a sudden increase of refugees from 2000 to 12,000 arriving on the Canary Islands by boat, so in March 2024, Ursula von der Leyen and Pedro Sánchez visited and the EU made a €210mn deal with Mauritania to reduce passage of African migrants through its territory towards
14632-432: Was deposed by Colonel Maaouya Ould Sid'Ahmed Taya , who, while retaining tight military control, relaxed the political climate. Ould Taya moderated Mauritania's previous pro-Algerian stance, and re-established ties with Morocco during the late 1980s. He deepened these ties during the late 1990s and early 2000s, as part of Mauritania's drive to attract support from Western states and Western-aligned Arab states. Its position on
14756-403: Was initially counteracted by the monsoon , which brought rain further north than it does today. By around 4200 BCE, however, the monsoon retreated south to approximately where it is today, leading to the gradual desertification of the Sahara. The Sahara is now as dry as it was about 13,000 years ago. Lake Chad is the remnant of a former inland sea, paleolake Mega-Chad, which existed during
14880-461: Was just one tenth the rainfall around 125 kya. In the southern Negev Desert speleothems did not grow between 185 and 140 kya ( MIS 6), 110–90 (MIS 5.4–5.2), nor after 85 kya nor during most of the interglacial period (MIS 5.1), the glacial period and Holocene . This suggests that the southern Negev was arid-to-hyper-arid in these periods. During the Last Glacial Maximum (LGM) the Sahara
15004-399: Was led by General Mohamed Ould Abdel Aziz , who won subsequent presidential elections in 2009 and 2014 . He was succeeded by General Mohamed Ould Ghazouani following the 2019 elections , head of an autocratic government with a very poor human rights record , particularly because of its perpetuation of slavery ; the 2018 Global Slavery Index estimates there are about 90,000 slaves in
15128-556: Was more extensive than it is now with the extent of the tropical forests being greatly reduced, and the lower temperatures reduced the strength of the Hadley Cell . This is a climate cell which causes rising tropical air of the Inter-Tropical Convergence Zone (ITCZ) to bring rain to the tropics, while dry descending air, at about 20 degrees north , flows back to the equator and brings desert conditions to this region. It
15252-495: Was plagued by attempted coups and intrigue within the military establishment. It became increasingly contested due to his harsh and uncompromising measures against opponents; many dissidents were jailed, and some executed. Slavery in Mauritania still exists, despite being officially abolished three timesː 1905, 1981, and again in August 2007. Anti-slavery activists are persecuted, imprisoned and tortured. In December 1984 Haidallah
15376-692: Was sufficient to affect the application of the UN General Assembly Declaration on the Granting of Independence to Colonial Countries and Peoples to Western Sahara . In 1976, Mauritania, along with Morocco , annexed the territory of Western Sahara . After several military losses to the Polisario – heavily armed and supported by Algeria, the regional power and rival to Morocco – Mauritania withdrew in 1979. Its claims were taken over by Morocco. Due to economic weakness, Mauritania has been
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