Word: sahel
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...decades have been well documented, the reasons for them remain obscure. That's not the case for individual storms, though. Atlantic hurricanes inevitably get their start in Africa, where hot, dry air overlying the Sahara desert collides with cooler, moister air over the sub-Saharan region known as the Sahel. Under normal conditions, the collision produces eddies of low-pressure air that drift out over the ocean, where storm clouds begin to form. Most of the time, the clouds simply dump their load of rain and dissipate...
...terrible, two-decade drought that plagued the African Sahel until lately also cut down on tropical storms, says Gray. Strong winds that accompanied this prolonged dry spell swept rain clouds away from the Sahel and sheared the tops off storm systems that might eventually have become hurricanes. Now that the drought has eased, these storms are more likely to persist and grow...
...Great Ocean Conveyor Belt, a vast, and so far poorly understood, undersea current that carries warm water from the Pacific and Indian oceans into the Atlantic. When the conveyor belt runs faster for unknown reasons, there is more warm water available to generate both rain in the Sahel and storms over the North Atlantic. Or so the reasoning goes...
Deep Forest was conceived by Michel Sanchez and Eric Mouquet, two French musicians who blended New Age electronics with UNESCO field recordings of music from Zaire, the Solomon Islands, Burundi, Tibesti and the Sahel...
...Africa, but the 4th millennium B.C. was a crucial time for the rest of the continent as well. The climate started to get progressively dryer, and the Sahara expanded into a vast desert. Nomadic tribes that herded cattle, sheep and goats on the fringes of the Sahara and the Sahel and in the Sudan were forced southward to the Central African savannas, where they gradually displaced hunter-gatherers who had dominated the area for thousands of years. Only in southern Africa, where farming was difficult, did the Stone Age hunter-gatherers and fishermen continue to hold their own. In caves...