| PALEOLIMNOLOGY |
A high resolution paleoclimate record spanning the past 25,000 years in southern East Africa
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Johnson, T.C., E.T. Brown, J.F. McManus, S.L. Barry, P. Barker. 2002. A high resolution paleoclimate record spanning the past
25,000 years in southern East Africa. Science Vol. 296, pp. 113-114
| Data Coverage |
North: -9.97667 * South: -10.265 |
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West: 34.23 * East: 34.3183 |
Start Year: 24308 cal yr BP * End Year: 155 cal yr BP
Data: Please Cite Data Contributors!
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Summary: High-resolution profiles of the mass accumulation rate of biogenic silica and other geochemical proxies in two piston cores
from northern Lake Malawi provide a climate signal for this part of tropical Africa spanning the past 25,000 years. The
biogenic silica mass accumulation rate was low during the relatively dry late Pleistocene, when the river flux of silica
to the lake was suppressed. Millennial-scale fluctuations, due to upwelling intensity, in the late Pleistocene climate of
the Lake Malawi basin appear to have been closely linked to the Northern Hemisphere climate until 11 thousand years ago.
Relatively cold conditions in the Northern Hemisphere coincided with more frequent north winds over the Malawi basin, perhaps
resulting from a more southward migration of the Intertropical Convergence Zone.
More Info on Paleolimnology |
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Complete XML Record: noaa-lake-5456
(Last Revised: 2007-09-05 )
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DOC/NOAA/NESDIS/NCDC (National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce )
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USA
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| http://www.ncdc.noaa.gov/paleo/ |
| E-mail: bruce.a.bauer@noaa.gov |
| E-mail: paleo@noaa.gov |
Phone: 303-497-6280
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