| PALEOLIMNOLOGY |
Abrupt climate change in southeast tropical Africa influenced by Indian monsoon variability and ITCZ migration.
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Tierney, J.E.,Russell, J.M. 2007 Abrupt climate change in southeast tropical Africa influenced by Indian monsoon variability
and ITCZ migration. Geophys. Res. Lett. Vol. 34, L15709
| 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: 18355 cal yr BP * End Year: 10360 cal yr BP
Data: Please Cite Data Contributors!
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Summary: The timing and magnitude of abrupt climate change in tropical Africa
during the last glacial termination remains poorly understood.
High-resolution paleolimnological data from Lake Tanganyika,
Southeast Africa show that wind-driven seasonal mixing in the lake
was reduced during the Younger Dryas, Inter-Allerød Cool Period,
Older Dryas, and Heinrich Event 1, suggesting a weakened southwest
Indian monsoon and a more southerly position of the Inter-Tropical
Convergence Zone over Africa during these intervals. These events
in Lake Tanganyika, coeval with millennial and centennial-scale
climate shifts in the high latitudes, suggest that changes in ITCZ
location and Indian monsoon strength are important components of
abrupt global climate change and that their effects are felt south
of the equator in Africa. However, we observe additional events
in Lake Tanganyika of equal magnitude that are not correlated with
high-latitude changes, indicating the potential for abrupt climate
change to originate from within tropical systems.
More Info on Paleolimnology |
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Complete XML Record: noaa-lake-6051
(Last Revised: 2009-02-11 )
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