| PALEOLIMNOLOGY |
Northern Hemisphere Controls on Tropical Southeast African Climate During the Past 60,000 Years.
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Tierney, J.E.,Russell, J.M.,Huang, Y.,Sinninghe Damste, J.S.,Hopmans, E.C.,Cohen, A.S. 2008 Northern Hemisphere Controls on
Tropical Southeast African Climate During the Past 60,000 Years. Science Vol. 322, No. 5899, pp. 252-255, 10 October 2008.
| Data Coverage |
North: -6.71378 * South: -6.71378 |
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West: 29.832616 * East: 29.832616 |
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Altitude: 773 m |
Start Year: -57500 cal yr BP * End Year: 600 cal yr BP
Data: Please Cite Data Contributors!
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Summary: The processes that control climate in the tropics are poorly understood.
We applied compound-specific hydrogen isotopes (dD) and the TEX86
(tetraether index of 86 carbon atoms) temperature proxy to sediment
cores from Lake Tanganyika to independently reconstruct precipitation
and temperature variations during the past 60,000 years. Tanganyika
temperatures follow Northern Hemisphere insolation and indicate that
warming in tropical southeast Africa during the last glacial termination
began to increase ~3000 years before atmospheric carbon dioxide
concentrations. dD data show that this region experienced abrupt changes
in hydrology coeval with orbital and millennial-scale events recorded in
Northern Hemisphere monsoonal climate records. This implies that
precipitation in tropical southeast Africa is more strongly controlled
by changes in Indian Ocean sea surface temperatures and the winter
Indian monsoon than by migration of the Intertropical Convergence Zone.
More Info on Paleolimnology |
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Complete XML Record: noaa-lake-6206
(Last Revised: 2009-02-11 )
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