Yvonne Kocot


Reconstruction of Holocene climate variability using speleothems from the Hüttenbläserschachthöhle, western Germany

In the framework of this project, we study speleothems from the Hüttenbläserschachthöhle (HBSH), western Germany, in order to reconstruct Holocene climate variability. Four stalagmites from HBSH are precisely dated by MC-ICPMS 230Th/U-dating. Stable oxygen and carbon isotope ratios as well as trace element concentrations are determined at high resolution. The composite record of all stalagmites ranges from ~14,000 years before present until today and, thus, also includes the Late Glacial.

We have also established a cave monitoring program in the HBSH in order to study the processes influencing the stable isotope and trace element signals in the studied speleothems. Drip water is sampled monthly at six drip sites in the cave, and measured parameters include pH, conductivity, stable isotopes and concentration of cations and anions. Furthermore, cave temperature and cave air pCO2 are determined at monthly resolution. pCO2 values indicate seasonal ventilation of the cave. The measurements within the cave are supplemented by monthly analysis of environmental parameters above the cave (e.g., temperature, amount and stable isotope values of precipitation).