| PALEOLIMNOLOGY |
Large temperature variability in the southern African tropics since the Last Glacial Maximum
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Powers, L.A., T.C. Johnson, J.P. Werne, I.S. Castaneda, E.C. Hopmans, J.S. Sinninghe Damste, S. Schouten. 2005. Large temperature
variability in the southern African tropics since the Last Glacial Maximum. Geophysical Research Letters Vol. 32, L08706
| Data Coverage |
North: -9.97667 * South: -10.265 |
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West: 34.23 * East: 34.3183 |
Start Year: 23880 cal yr BP * End Year: 250 cal yr BP
Data: Please Cite Data Contributors!
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Summary: The role of the tropics in global climate change is actively debated, particularly in regard to the timing and magnitude
of thermal and hydrological response. Continuous, high-resolution temperature records through the Last Glacial Maximum (LGM)
from tropical oceans have provided much insight but surface temperature reconstructions do not exist from tropical continental
environments. Here we used the TEX86 paleotemperature proxy to reconstruct mean annual lake surface temperatures through
the Last Glacial Maximum (LGM) in Lake Malawi, East Africa (9º-14ºS). We find a ~3.5ºC overall warming since the LGM, with
temperature reversals of ~ 2ºC during the Younger Dryas (12.5 ka BP) and at 8.2 ka BP. Maximum Holocene temperatures of
~29ºC were found at 5 ka BP, a period preceding severe drought in Africa. These results suggest a substantial thermal response
of southeastern tropical Africa to deglaciation and to varying conditions during the Holocene.
More Info on Paleolimnology |
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Complete XML Record: noaa-lake-5446
(Last Revised: 2009-02-11 )
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