|Kilimanjaro Ice Core Records: Evidence of Holocene Climate Change in Tropical Africa|
Kilimanjaro Ice Core Records: Evidence of Holocene Climate Change in Tropical Africa
Science, Volume 298, 5593, 18 October 2002.
Lonnie G. Thompson, Ellen Mosley-Thompson, Mary E. Davis,
Keith A. Henderson, Henry H. Brecher, Victor S. Zagorodnov,
Tracy A. Mashiotta, Ping-Nan Lin
The Ohio State University
Vladimir N. Mikhalenko
Douglas R. Hardy
Six ice cores from Kilimanjaro provide an ~11.7-thousand-year record of Holocene climate and environmental variability for eastern equatorial Africa, including three periods of abrupt climate change: ~8.3, ~5.2, and ~4 thousand years ago (ka). The latter is coincident with the "First Dark Age," the period of the greatest historically recorded drought in tropical Africa. Variable deposition of F- and Na+ during the African Humid Period suggests rapidly fluctuating lake levels between ~11.7 and 4 ka. Over the 20th century, the areal extent of Kilimanjaro's ice fields has decreased ~80%, and if current climatological conditions persist, the remaining ice fields are likely to disappear between 2015 and 2020.
| DATA: |
Download the Kilimanjaro d18O, Ion, and Dust Data
from the WDC Paleo Archive
To read or view the full study, please visit the
Science website. |
It was published in Science, Volume 298, 5593, 18 October 2002.
This project was funded by grant ATM-9910172 from the
U.S. National Science Foundation's Earth System History Program.
Please also note the profile of Dr. Lonnie Thompson and the |
Byrd Polar Research Center group in the same issue of Science, pp. 518-522.
Contact Us |
National Oceanic and Atmospheric Administration
18 October 2002