noun, Pathology. 1. the accumulation of excessive ketones in the body, as in diabetic acidosis. Origin of ketosis. 1915-1920.
Climate zones of Africa, showing the ecological break between the hot desert climate of the Sahara Desert (red), the hot semi-arid climate of the Sahel (orange) and the tropical climate of Central and Western Africa (blue).
The south of the Sahara Desert, along the boundary with the hot semi-arid climate (BSh) of the Sahel, receives most of his annual rainfall during the highest-sun months (summer) when the Inter-Tropical Convergence Zone moves up from the south while. Wind and sand storms occur as soon as early spring.