A 3000-year climatic record from biogenic silica oxygen isotopes in an equatorial high-altitude lake
A record of oxygen isotopes in biogenic opal, 4200 to 1200 calibrated years before the present, from a high-altitude proglacial lake on Mount Kenya, East Africa, exhibits short-term fluctuations on a time scale of centuries as well as long-term variations. The short-term fluctuations are attributed to changes in the glacier meltwater input, and the long-term variations are related to changes in lake temperature. The record indicates that the climate was warm in Equatorial East Africa from 2300 to 1500 years before the present.
Rietti-Shati
M
M. Rietti-Shati and A. Shemesh, Department of Environmental Sciences and Energy Research, Weizmann Institute of Science, Rehovot 76100, Israel. W. Karlen, Department of Physical Geography, University of Stockholm, Stockholm S-106 91, Sweden.
Shemesh
A
Karlen
W