Figure 10. Timing of the onset and the termination of the African Humid Period as found in proxies of the West African monsoon. The red curve (a) shows the insolation changes at 30°N during June–July–August. Sub-figures b depicts the deposition of mineral dust (given in terms of percentage of terrigenous material) in the Atlantic Ocean at the Mauretanian coast at 20.8°N, c-e show the isotopic changes in leaf wax from the Senegal River at 15.5°N, Lake Bosumtwi, 6.5°N, and from the Congo fan at 5.5°S, respectively. The red dashed arrow indicates a southward shift of the rainbelt. (Redrawn from Shanahan et al., 2015).