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29 septembre 2015
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Sophie Darfeuil et al., « Holocene North African Climate », La lettre du Collège de France, ID : 10.4000/lettre-cdf.2183
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During the Holocene, that is, the last 11,500 years, the North African climate has undergone significant changes. While the Sahara is now the largest desert on Earth, there used to be a “Green Sahara” at the beginning of the Holocene. It resulted from significant precipitations that were linked to the northward shift of the inter-tropical convergence zone, which was caused by the increase in summer insolation in the northern hemisphere. Holocene lacustrine deposits from Hassi El Medjna, Gran...