Fig. 5 | Scientific Reports

Fig. 5

From: A comprehensive stalagmite investigation distinguishing anthropogenic and natural signals in Madagascar between 1680 and 1860

Fig. 5

Uranium and δ18O covariations. (a) Time series of δ18O (blue) and U/Ca ratio (orange) along with their environmental implications (for discussion). Note that the U/Ca data were smoothed to match with the temporal resolution of δ18O. (b) Wavelet coherence plot that was run on the evenly smoothed U/Ca and δ18O dataset. (c) Spectral analysis profile for U/Ca.

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