Detection and origin of different types of annual laminae in recent stalagmites from Zoolithencave, southern Germany: Evaluation of the potential for quantitative reconstruction of past precipitation variability
Dana Felicitas Christine Riechelmann1, Jens Fohlmeister2, Rik Tjallingii3,4, Klaus Peter Jochum5, Detlev Konrad Richter6, Geert-Jan A. Brummer4, and Denis Scholz11Johannes Gutenberg-University Mainz, Institute for Geosciences, Johann-Joachim-Becher-Weg 21, D-55128 Mainz, Germany 2Ruprecht - Karls University Heidelberg, Institute for Environmental Physics, Im Neuenheimer Feld 229, D-69120 Heidelberg, Germany 3GFZ German Research Centre for Geosciences, Section Climate Dynamics and Landscape Evolution, Telegrafenberg Building C, D-14473 Potsdam, Germany 4NIOZ-Royal Netherlands Institute for Sea Research, Department of Marine Geology and Chemical Oceanography, Landsdiep 4, NL-1797 SZ ’t Horntje (Texel), The Netherlands 5Max Planck Institute for Chemistry, Climate Geochemistry Depart ment , Hahn-Meitner-Weg 1, D-55128 Mainz, Germany 6Ruhr-University Bochum, Institute for Geology, Mineralogy and Geophysics, Univeristätsstrasse 150, D-44801 Bochum, Germany
Received: 01 Feb 2016 – Accepted for review: 14 Feb 2016 – Discussion started: 15 Feb 2016
Abstract. An arrangement of three stalagmites from Zoolithencave (southern Germany) was analysed for different types of annual laminae using both microscopic and geochemical methods. The speleothems show visible laminae (consisting of a clear and a brownish, pigmented layer pair) as well as fluorescent and elemental laminae. The age of the speleothems was constrained to 1800 to 1970 AD by 14C-dating of a charcoal piece below the speleothems, detection of the 14C bomb peak, as well as counting of annual laminae. Dating by the 230Th/U-method was impossible due to detrital contamination. On the annual time-scale, the variability of Mg, Ba, and Sr is controlled by Prior Calcite Precipitation (PCP) resulting in lower values during the wet season (autumn/winter) and vice versa. Yttrium and P are proxies for soil activity and are enriched in the brownish, pigmented layers. However, Y and P are also influenced by detrital content superimposing the soil activity signal. Aluminium and Mn are proxies for detrital content. Lamina thickness shows a significant correlation with the amount of precipitation of previous December and current January, February, March, April, May, and December (DJFMAMD) recorded at the nearby meteorological station Bamberg. Thus lamina thickness is a proxy for past precipitation, which is confirmed by the good agreement with a precipitation reconstruction based on tree-ring width from the Bavarian forest. This highlights the potential of these speleothems for climate reconstruction at annual resolution.
Riechelmann, D. F. C., Fohlmeister, J., Tjallingii, R., Jochum, K. P., Richter, D. K., Brummer, G.-J. A., and Scholz, D.: Detection and origin of different types of annual laminae in recent stalagmites from Zoolithencave, southern Germany: Evaluation of the potential for quantitative reconstruction of past precipitation variability, Clim. Past Discuss., doi:10.5194/cp-2016-18, in review, 2016.