| PALEOLIMNOLOGY |
Little Ice Age drought in equatorial Africa: Intertropical Convergence Zone migrations and El Nino-Southern Oscillation variability
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Russell, J.M., T.C. Johnson. 2007. Little Ice Age drought in equatorial Africa: Intertropical Convergence Zone migrations
and El Nino-Southern Oscillation variability. Geology Vol. 35, No. 1, pp. 21-24
| Data Coverage |
North: -.4167 * South: -.4167 |
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West: 29.75 * East: 29.75 |
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Altitude: 917 m |
Start Year: 5400 cal yr BP * End Year: 0 cal yr BP
Data: Please Cite Data Contributors!
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Summary: High-resolution analyses of the Mg concentration in authigenic calcite in five cores from Lake Edward provide a water balance
history of central equatorial Africa spanning the past 1400 yr. A high ratio of Mg to Ca (%Mg) indicates strong droughts
in central Africa during the Little Ice Age (A.D. 1400-1750), in contrast to records from Lake Naivasha, Kenya, which suggest
a wet Little Ice Age. This spatial pattern in Africa likely arose due to coupled changes in the high latitudes, the position
of the Intertropical Convergence Zone, and the El Niño-Southern Oscillation (ENSO) system. Our results further suggest that
the patterns and variability of twentieth-century rainfall in central Africa have been unusually conducive to human welfare
in the context of the past 1400 yr.
More Info on Paleolimnology |
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Complete XML Record: noaa-lake-5452
(Last Revised: 2007-09-05 )
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