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predavanje 25. maja 2006,
Mala dvorana ZRC SAZU, Novi trg 4 (2. nadstropje)

ob 18:00
Wolfgang Dreybrodt 
University of Bremen

Stalagmites, chemical kinetics of calcite deposition, and climate


 Stalagmites have become important proxies of paleo-climate by use of ?18O data. However, much information in morphology and growth rates is also related to climatic changes and may be used as supplementary information. 
Based on the geochemistry of water, dripping to the speleothem and depositing calcite, principles of stalagmite growth are established. From these a computer model is constructed that models growth and morphology of stalagmites. This model is applied to some climatic scenarios (e.g. VOSTOK) to show how climatic signals may influence growth rates and diameters of stalagmites.