I have been generating records of calcium isotopes in a well dated Indian speleothem as well as a speleothem from California. The variations in calcium isotopes provide an indication of prior calcium precipitation, with fractionation dependent on the quantity of water reaching the cave.  

This research is being undertaken in collaboration with Sasha Turchyn, University of Cambridge, Jessica Oster, Vanderbilt University, and Sebastian Breitenbach, University of Bochum, Germany.  

Conference Presentations and Papers in Prep:

De Wet, C., Erhardt, A., Sharp, W., Oster, J., 2018. Application of the speleothem calcium isotope paleo-rainfall proxy to the 8.2 ka event in coastal California. American Geophysical Union. Poster Presentation. 

Roney, E., Oster, J., Sharp, W., Marks, N., Erhardt, A., Breitenbach, S., 2018. Calibrating multiple isotopic proxies in a modern aragonite speleothem from Northeast India. European Geophysical Union.

Roney, E., Oster, J., Sharp, W., Marks, N., Erhardt, A., Breitenbach, S., 2018. Calibrating multiple isotopic proxies in a modern aragonite speleothem from Northeast India. American Geophysical Union. Poster Presentation.

Magiera, M., Erhardt, A.M., Hartland, A., Kwiecien, O., Cheng, H., Immenhauser, A., Turchyn, A., Breitenbach, S., 2017. Indian Summer Monsoon dynamics during Termination II and MIS 5e.  European Geophysical Union.