| PALEOLIMNOLOGY |
Cooling cycles, Heinrich event 1, and the desiccation of Lake Victoria
|
|
Stager, J.C., B.F. Cumming, L.D. Meeker. 2002. Cooling cycles, Heinrich event 1, and the desiccation of Lake Victoria. Palaeogeography,
Palaeoclimatology, Palaeoecology Vol. 183, pp. 169-178
| Data Coverage |
North: .0833 * South: .0833 |
|
West: 32.8006 * East: 32.8006 |
|
Altitude: 1134 m |
Start Year: 14375 cal yr BP * End Year: 457 cal yr BP
Data: Please Cite Data Contributors!
|
|
Summary: East Africa's enormous Lake Victoria dried out at the close of the last glacial, but the precise timing and origin of that
drying event have not been clarified, largely because of uncertainty regarding core stratigraphy and ancient carbon effects
on 14C dates from the lake. New dates and re-examination of evidence from widely distributed cores shows that desiccation
occurred some time between 15 900 and 14 200 calendar years BP, and perhaps also ca. 18-17 kyr BP. These lake level minima
were briefer than has been previously suggested and were synchronous with pronounced global climate disruptions including
North Atlantic ice-rafting Heinrich event 1. Less severe declines occurred during the Older and Younger Dryas intervals. Dansgaard-Oeschger
type cooling cycles registered in the GISP2 ice core record tracked major lake level regressions in East Africa and weakenings
of Afro-Asian monsoons during the late Quaternary, possibly linking the desiccation of Lake Victoria to century-scale reductions
in solar radiation output.
More Info on Paleolimnology |
|
|
Complete XML Record: noaa-lake-5460
(Last Revised: 2007-09-05 )
|
|
 |
DOC/NOAA/NESDIS/NCDC (National Climatic Data Center, NESDIS, NOAA, U.S. Department of Commerce )
325 Broadway, E/CC23
Boulder, CO 80305
USA
|
| http://www.ncdc.noaa.gov/paleo/ |
| E-mail: bruce.a.bauer@noaa.gov |
| E-mail: paleo@noaa.gov |
Phone: 303-497-6280
Fax: 303-497-6513
|
|
