Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Science 14 August 1998:
Vol. 281. no. 5379, pp. 980 - 982
DOI: 10.1126/science.281.5379.980
Prev | Table of Contents | Next

Reports

A 3000-Year Climatic Record from Biogenic Silica Oxygen Isotopes in an Equatorial High-Altitude Lake

M. Rietti-Shati, A. Shemesh, * W. Karlen

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.

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.
*   To whom correspondence should be addressed.

Read the Full Text


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Cyclic Variation and Solar Forcing of Holocene Climate in the Alaskan Subarctic.
F. S. Hu, D. Kaufman, S. Yoneji, D. Nelson, A. Shemesh, Y. Huang, J. Tian, G. Bond, B. Clegg, and T. Brown (2003)
Science 301, 1890-1893
   Abstract »    Full Text »    PDF »
Reconstruction of postglacial to early Holocene vegetation history in terrestrial Central Europe via cuticular lipid biomarkers and pollen records from lake sediments.
L. Schwark, K. Zink, and J. Lechterbeck (2002)
Geology 30, 463-466
   Abstract »    Full Text »    PDF »
A 14,000-Year Oxygen Isotope Record from Diatom Silica in Two Alpine Lakes on Mt. Kenya.
P. A. Barker, F. A. Street-Perrott, M. J. Leng, P. B. Greenwood, D. L. Swain, R. A. Perrott, R. J. Telford, and K. J. Ficken (2001)
Science 292, 2307-2310
   Abstract »    Full Text »    PDF »
Holocene climatic change in Swedish Lapland inferred from an oxygen-isotope record of lacustrine biogenic silica.
A. Shemesh, A. Shemesh, G. Rosqvist, M. Rietti-Shati, L. Rubensdotter, C. Bigler, R. Yam, and W. Karlen (2001)
The Holocene 11, 447-454
   Abstract »    PDF »


To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)