Can we separate the non-PCP component of variation in speleothem d13C?
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Speaker: Prof. Heather Stoll, ETH Zurich
Date: 27 June 2022
Time: 9:00 am Central European Summer Time (Find your date and time here)
Zoom link: to be sent in an email
Abstract
The carbon isotopic signatures inherited from soil/epikarst are often subsequently modified by prior calcite precipitation (PCP) effects before they are imprinted in speleothem calcite. In many settings, the soil and epikarst signal may reflect the temperature sensitivity of respiration rates and soil pCO2. In this presentation, we discuss the feasibility, advantages, and disadvantages of using trace element ratios and d44Ca to separate out the temporally varying effect of PCP from d13C records. We present a simple first approach accessible to all users via an Excel template, and highlight what further constraints from field and experimental studies will help improve the robustness of such corrections in the future.
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