The Medieval Warm Period in Kyoto, Japan
Aono, Y. and Saito, S. 2010. Clarifying springtime temperature reconstructions of the medieval period by gap-filling the cherry blossom phenological data series at Kyoto, Japan. International Journal of Biometeorology 54: 211-219.
Aono and Saito report that their temperature reconstruction "showed two warm temperature peaks of 7.6°C and 7.1°C, in the middle of the tenth century and at the beginning of the fourteenth century, respectively," and they say that "the reconstructed tenth century temperatures [AD 900-1000] are somewhat higher than present temperatures after subtracting urban warming effects." Last of all, they add that "the general pattern of change in the reconstructed temperature series in this study is similar to results reported by previous studies, suggesting a warm period in Asia corresponding to the Medieval Warm Period in Europe."
This insightful new study provides a stellar example of both ingenuity and tedious bibliographic sleuthing, as well the significant warmth of the Medieval Warm Period at a specific location, which is said to be typical of what has been learned about the Asian continent in general by the studies of others. In addition, it suggests the importance of considering the presence or absence of urban heat island effects when comparing current and past reconstructed temperatures. And when considered in total, all of these things come together to further strengthen the likelihood that the Medieval Warm Period was truly a global phenomenon, and that its peak warmth was greater than what has been experienced to date in our day.