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Kilimanjaro Ice Core Records: Evidence of Holocene Climate Change in Tropical Africa

Kilimanjaro Ice Core Records: Evidence of Holocene Climate Change in Tropical Africa,10.1126/science.1073198,Science,Lonnie G. Thompson,Ellen Mosley-T

Kilimanjaro Ice Core Records: Evidence of Holocene Climate Change in Tropical Africa   (Citations: 226)
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Six ice cores from Kilimanjaro provide an ~11.7-thousand-year record of Holocene climate and environmental variability for eastern equatorial Africa, including three periods of abrupt climate change: ~8.3, ~5.2, and ~4 thousand years ago (ka). The latter is coincident with the ``First Dark Age,'' the period of the greatest historically recorded drought in tropical Africa. Variable deposition of F- and Na+ during the African Humid Period suggests rapidly fluctuating lake levels between ~11.7 and 4 ka. Over the 20th century, the areal extent of Kilimanjaro's ice fields has decreased ~80%, and if current climatological conditions persist, the remaining ice fields are likely to disappear between 2015 and 2020.
Journal: Science , vol. 298, no. 5593, pp. 589-593, 2002
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