At about 18,000 ybp (Late Pleistocene, at the height of the last major glacial advance), the Sahara/Sahel boundary lay at about 10°N latitude. Worldwide temperatures were significantly colder then than they are today. The Early Holocene, by contrast, was a time of temperatures worldwide than either warmer the Late Pleistocene or the modern era. The Early Holocene is commonly referred to as the "Early Holocene Climatic Optimum". on the geological record preserved in the Sahara from the Late Pleistocene, Early Holocene, and present, what might you predict for rainfall conditions in the Saharan region if global warming results in long-term worldwide temperature rise? Explain your answer, and provide evidence. Major Floristic Regions Of North Africa With Characteristic Pollen Taxa III Saharan: desert with very limited pollen flora. Wadis typically contain Tamarix, Cornulaca, Calligonium, – Fagonia, Salvadora, Maerua. IV Sahelian: sparsely wooded desert grassland and thorny shrubland; grades into Saharan type in the – and to Sudanian type in the south. of various species are ubiquitous (these are the thorny trees of the Sahel); also Acacias Commiphora, and the shrub Blepharis, Balanites, Tribulus. Rainfall determines which annual and perennial herbaceous plants and shrubs form the ground cover in a particular place. In the wetter parts of the Sahel, (grasses) and (plants that grow Graminae Cyperaceae on and stabilize inactive sand dunes) dominate. In drier (notice that I spelled this correctly this time, and didn’t use as in washer and dryer, like I did last time...) parts, and “dryer”, Chenopodiaceae dominate. Amaranthaceae V Sudanian: wooded savanna and dry forest. The most common tree taxa are and Grewia Piliostigma. – Other species of plants include and Celtis integrifolia, Combretaceae, Lannea. Team #1 Haijad, in the Taoudenni Depression
At about 18,000 ybp (Late Pleistocene, at the height of the last major glacial advance), the Sahara/Sahel boundary lay at about 10°N latitude. Worldwide temperatures were significantly colder then than they are today. The Early Holocene, by contrast, was a time of warmer temperatures worldwide than either the Late Pleistocene or the modern era. The Early Holocene is commonly referred to as the "Early Holocene Climatic Optimum". on the geological record preserved in the Sahara from the Late Pleistocene, Early Holocene, and present, what might you predict for rainfall conditions in the Saharan region if global warming results in long-term worldwide temperature rise? Explain your answer, and provide evidence. Major Floristic Regions Of North Africa With Characteristic Pollen Taxa III – Saharan: desert with very limited pollen flora. Wadis typically contain Tamarix, Cornulaca, Calligonium, Fagonia, Salvadora, Maerua. IV – Sahelian: sparsely wooded desert grassland and thorny shrubland; grades into Saharan type in the and to Sudanian type in the south. Acacias of various species are ubiquitous (these are the thorny trees of the Sahel); also Commiphora, Blepharis, Balanites, and the shrub Tribulus. Rainfall determines which annual and perennial herbaceous plants and shrubs form the ground cover in a particular place. In the wetter parts of the Sahel, Graminae (grasses) and Cyperaceae (plants that grow on and stabilize inactive sand dunes) dominate. In drier (notice that I spelled this correctly this time, and didn’t use “dryer”, as in washer and dryer, like I did last time...) parts, Chenopodiaceae and Amaranthaceae dominate. V – Sudanian: wooded savanna and dry forest. The most common tree taxa are Grewia and Piliostigma. Other species of plants include Celtis integrifolia, Combretaceae, and Lannea. Team #1 Haijad, in the Taoudenni Depression
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