Desert 9 T01

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As areas where the Tichitt cultural tradition were present, Dhar Tichitt and Dhar Walata were occupied more frequently than Dhar Néma. [97] Farming of crops (e.g., millet) may have been a feature of the Tichitt cultural tradition as early as 3rd millennium BCE in Dhar Tichitt. [97] West Saharan montane xeric woodlands". Terrestrial Ecoregions. World Wildlife Fund . Retrieved 29 December 2007. You can highlight the terms by the frequency with which they occur in the written English language using the menu below. The frequency data is extracted from the English Wikipedia corpus, and updated regularly. If you just care about the words' direct semantic similarity to desert, then there's probably no need for this. Wikipedia articles incorporating a citation from the 1911 Encyclopaedia Britannica with Wikisource reference Subtropical deserts are caused by the circulation patterns of air masses. They are found along the Tropic of Cancer, between 15 and 30 degrees north of the Equator, or along the Tropic of Capricorn, between 15 and 30 degrees south of the Equator.

Other hot spots in Algeria such as Adrar, Timimoun, In Salah, Ouallene, Aoulef, Reggane with an elevation between 200 and 400 metres (660 and 1,310ft) above sea level get slightly lower summer average highs, around 46°C (114.8°F) during 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 the desert experiences around three to five months when the average high strictly [ clarification needed] 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 [ clarification needed] 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 the hottest regions year-round. However, most of the desert has a value in excess of 25°C (77°F). a b c White, Kevin; Mattingly, David J. (2006). "Ancient Lakes of the Sahara". American Scientist. 94 (1): 58–65. doi: 10.1511/2006.57.983. 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.Tanezrouft – a desert covering northern Mali, northwestern Niger as well as central and southern Algeria, at the west of the Hoggar Mountains

Wade, Lizzie (2015). "Drones and Satellites Spot Lost Civilizations in Unlikely Places". Science. doi: 10.1126/science.aaa7864. Meanwhile, the desert wind gives a soft hug and carries a calming scent, all together reminding us of nature’s beauty. Hot, moist air rises into the atmosphere near the Equator. As the air rises, it cools and drops its moisture as heavy tropical rains. The resulting cooler, drier air mass moves away from the Equator. As it approaches the tropics, the air descends and warms up again. The descending air hinders the formation of clouds, so very little rain falls on the land below.The South Saharan steppe and woodlands ecoregion is a narrow band running east and west between the hyper-arid Sahara and the Sahel savannas to the south. Movements of the equatorial Intertropical Convergence Zone (ITCZ) bring summer rains during July and August which average 100 to 200mm (4 to 8in) but vary greatly from year to year. These rains sustain summer pastures of grasses and herbs, with dry woodlands and shrublands along seasonal watercourses. This ecoregion covers 1,101,700 square kilometres (425,400sqmi) in Algeria, Chad, Mali, Mauritania, and Sudan. [46] In 1999, Jamie Clarke became the first Westerner to cross the Empty Quarter of Arabia in fifty years. His team of six, guided by three Bedouins, spent 40 days crossing the desert with a caravan of 13 camels. [18] Wengrow, David; Dee, Michael; Foster, Sarah; Stevenson, Alice; Ramsey, Christopher Bronk (March 2014). "Cultural convergence in the Neolithic of the Nile Valley: a prehistoric perspective on Egypt's place in Africa". Antiquity. 88 (339): 95–111. doi: 10.1017/S0003598X00050249. ISSN 0003-598X. S2CID 49229774. Desert skies offer an exceptional stage for observing the celestial dance of planets. Venus, known as the Evening Star, shines brightly after sunset. It’s also visible as the Morning Star before sunrise. Its radiant, steady glow stands out prominently, casting a soft, enchanting light over the desert. In the desert at night, you can experience absolute silence and no human-made noises, giving you a sense of calmness. It allows you to feel a deep connection with nature.

Deserts are found on every continent and cover about one-fifth of Earth’s land area. They are home to around 1 billion people—one-sixth of the Earth’s population.As you walk in the desert at night, each step can make a soft, glowing light under your feet. It adds mystery to the exciting night, showing us how life can shine even in challenging places on Earth. 4. Desert Skies Offer Mesmerising Celestial Motion for Stargazers. Some geographical features are referred to as "deserts", and this word may even feature in their names, despite not meeting any meteorological definitions for a desert. [ citation needed] Cook, Kerry H.; Vizy, Edward K. (2015). "Detection and Analysis of an Amplified Warming of the Sahara Desert". Journal of Climate. 28 (16): 6560. Bibcode: 2015JCli...28.6560C. doi: 10.1175/JCLI-D-14-00230.1. To the south, the Sahara is bounded by the Sahel, a belt of dry tropical savanna with 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. [14] [15] According to climatic criteria, the southern limit of the Sahara corresponds to the 150mm (5.9in) isohyet of annual precipitation (this is a long-term average, since precipitation varies annually). [16] Jonathan Watts (7 September 2020). "Africa's Great Green Wall just 4% complete halfway through schedule". The Guardian. ISSN 0261-3077. Archived from the original on 6 May 2022 . Retrieved 18 December 2021– via www.theguardian.com.