Figure 7 | Scientific Reports

Figure 7

From: The potential of gypsum speleothems for paleoclimatology: application to the Iberian Roman Humid Period

Figure 7

Pollution proxies from 3,000 to 1,000 years BP compared to the Sima Blanca paleo-humidity record: (a) Estimation of global lead emissions reconstructed from lead concentration in Greenland ice core NGRIP250; (b) Pb and Sb concentrations in Alpine ice cores52; (c,d) Pb/Al ratio in sediments of Lake Zoñar and Alboran Sea cores33; (e) Charcoal content in sediments (fragments/cm3) of Laguna de la Mula36; (f) Reconstructed d-excess and δ18O of evaporated dripwater in Sima Blanca Cave (this study). Major historical events related to the Roman Empire are indicated, including the occupation and abandonment of the Iberian Peninsula.

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