Figure 5: Speleothem Calcite Model-Data Comparison: the effect of Karst Transit Time (τ) on β. Simulated vs. Observed δ18O of speleothem calcite at Cascayunga Cave. PSD is plotted, simulated using an ensemble of plausible values (6 months to 5 years) for the karst transit time parameter, τ. The spectrum reddens as the transit time increases. The orange solid line indicates the mean β slope for the observations. Figure illustrates broadening disagreement between simulated and observed speleothem δ18O approaching decadal-centennial timescales.
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