Articles | Volume 12, issue 5
https://doi.org/10.5194/cp-12-1243-2016
https://doi.org/10.5194/cp-12-1243-2016
Research article
 | 
27 May 2016
Research article |  | 27 May 2016

Interannual and (multi-)decadal variability in the sedimentary BIT index of Lake Challa, East Africa, over the past 2200 years: assessment of the precipitation proxy

Laura K. Buckles, Dirk Verschuren, Johan W. H. Weijers, Christine Cocquyt, Maarten Blaauw, and Jaap S. Sinninghe Damsté

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Cited articles

Barker, P. A., Hurrell, E. R., Leng, M. J., Wolff, C., Cocquyt, C., Sloane, H. J., and Verschuren, D.: Seasonality in equatorial climate over the last 25 000 years revealed by oxygen isotope records from Mount Kilimanjaro, Geology, 39, 1111–1114, https://doi.org/10.1130/G32419.1, 2011.
Barker, P. A., Hurrell, E. R., Leng, M. J., Plessen, B., Wolff, C., Conley, D. J., Keppens, E., Milne, I., Cumming, B. F., Laird, K. R., Kendrick, C. P., Wynn, P. M., and Verschuren D.: Carbon cycling within an East African lake revealed by the carbon isotope composition of diatom silica: a 25 ka record from Lake Challa, Mt. Kilimanjaro, Quaternary Sci. Rev., 66, 55–63, https://doi.org/10.1016/j.quascirev.2012.07.016, 2013.
Bessems, I., Verschuren, D., Russell, J. M., Hus, J., Mees, F., and Cumming, B. F.: Palaeolimnological evidence for widespread late 18th century drought across equatorial East Africa, Palaeogeogr. Palaeocl., 259, 107–120, https://doi.org/10.1016/j.palaeo.2007.10.002, 2008.
Blaauw, M., van Geel, B., Kristen, I., Plessen, B., Lyaruu, A., Engstrom, D. R., van der Plicht, J., and Verschuren, D.: High-resolution 14C dating of a 25 000-year lake-sediment record from equatorial East Africa, Quaternary Sci. Rev., 30, 3043–3059, https://doi.org/10.1016/j.quascirev.2011.07.014, 2011.
Blaga, C. I., Reichart, G. J., Heiri, O., and Sinninghe Damsté, J. S.: Tetraether membrane lipid distributions in water-column particulate matter and sediments: a study of 47 European lakes along a north-south transect, J. Paleolimnol., 41, 523–540, https://doi.org/10.1007/s10933-008-9242-2, 2009.
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Short summary
This paper discusses the underlying mechanisms of a method that uses specific membrane lipids present in the sediments of an African tropical lake to determine past changes in rainfall. With this method, past dry periods in the last 25 000 years can be assessed.