Fig. 7: Speleothem GP5 proxies.

Aragonite δ18O (a), and concentrations of U (b), Sr (c), Ba (d), Mg (e), and annual growth rate (f). The green rectangle indicates the period (1140–1364 AD) with a positive correlation between U/Ca and Sr/Ca (g) and a negative correlation between Sr/Ca and Ba/Ca (h). U/Ca and Ba/Ca do not show a strong correlation (i). The data can be found in Table S5.