IIHMHlNHHHH M NEWS AND NOTES WES T AFRICAN DROUGHT dr y periods the lake shrinks and oscillation has been suspected in RECOR D EMERGES FROM LAKE exposes more soil, which washes affectin g drought s by computer BOTTO M int o the lake, increasing the soil simulations and datasets that in- Scientists from the University of element concentrations. clude tree-ring variations, the con- nection hadn't been confirmed over Arizona recently looked to th e bot- "Lake Bosumtwi is really unique tom of Lake Bosumtwi in Ghana, in that its one of the few locations long time periods, until now. West Africa, for details to explain i n tropical West Africa where Th e sediment record was also th e country's severe droughts. varves , annual sediment layers, marke d by less frequent , bu t more The research indicated that severe are preserved," notes Shanahan. severe , centuries-long drought drought s lasting several decades, "This allows us to look at changes events . The scientists note that even centuries, have happened in climate at very high resolution." du e to the size and duration of frequently in West Africa over the Th e team discovered that the these droughts
Bulletin of the American Meteorological Society – American Meteorological Society
Published: Jul 1, 2009
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