Figure 2: Coral Aragonite Model-Data Comparison: simulated (pink) and measured (black) spectrum for Palmyra coral data, as well as the effects of altering α2 at Palmyra island alongside the climate inputs to the model (SST, SSS). Straight orange lines are the calculated mean slopes across both decadal to centennial (20-200, βD) and interannual (2-8, βI ) timescales. The black-dotted envelope represents the full range of outcomes given the perturbed salinity parameter space. Low frequency variance observed in the coral data (black dashed line) greatly exceeds that of the simulated pseudo coral data (pink), and the discrepancy grows with increasing timescale. Also shown: simulated sensitivity to salinity changes and potential parameter uncertainties in the PSM (α2), effects on β, (faint black dots), which does not help account for the model-data discrepancies. We removed the mean from all fields prior to computed the PSD.
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