Taricco, C., Ghil,, M., Alessio, S. and Vivaldo, G. 2009. Two millennia of climate variability in the Central Mediterranean. Climate of the Past 5: 171-181.
Taricco et al. developed a high-resolution record of foraminiferal (Globigerinoides ruber) δ18O from a Central-Mediterranean (39°45'53"N, 17°53'33"E) sediment core that covers the last two millennia. As they describe it, several features of this record "clearly correspond to distinct climatic periods: the low δ18O values [= higher temperatures] near AD 1000 are associated with the Medieval Optimum, while the modern steep decrease since AD 1800 leads to even lower[= higher temperature] values."