Figure 6 | Scientific Reports

Figure 6

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

Figure 6

Stable isotope composition of paleo-dripwater in Sima Blanca cave, (a) the 14C atmospheric production as an indicator of solar activity45 and (b) the North Atlantic oscillation (NAO index)44. The grey shades represent the time-series 95% confidence interval of the proxies obtained by the COPRA code21 that combine analytical errors of stable isotope measurements and the age model errors.

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