Fig. 4: Inflation of coral Sr/Ca and δ18O variation by non-climate noise. | Communications Earth & Environment

Fig. 4: Inflation of coral Sr/Ca and δ18O variation by non-climate noise.

From: Strontium to calcium ratio and oxygen isotopic coral records can exaggerate past decadal tropical climate variability

Fig. 4: Inflation of coral Sr/Ca and δ18O variation by non-climate noise.

Corrected versus raw variance of coral Sr/Ca and δ18O proxies calculated by integrating the corrected and raw proxy spectra (Sclim and Sproxy respectively) across frequency bands corresponding to characteristic timescales. The inflation factor is a variance ratio, the ratio in terms of standard deviation is given in parentheses. Error bars show 68% (+− 1 se) and 95% confidence intervals from bootstrapping.

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