| Reading the wikipedia, every single citation they used contradicts what the wikipedia says: https://en.wikipedia.org/wiki/Medieval_Warm_Period#cite_note... http://ruby.fgcu.edu/courses/twimberley/EnviroPhilo/Glacial.... > The first phase of the LIA began around the thirteenth century in all the regions for
which there is evidence. The glacial phase preceding the MWP seems to have begun
between the seventh and ninth centuries A.D. but is generally less securely dated
and not dated at all in Canada. There are at least some indications of fluctuations
in ice position in the course of the MWP in Norway, Alaska, and perhaps in
extratropical South America and New Zealand, indicating that recession may have
been interrupted by advances, perhaps of limited extent, as in the European Alps.
The available evidence suggests that the MWP was global in extent and not uniform
climatically. The glacial data needs to be considered in relation to that from other
sources, but is of value in obtaining a more complete understanding of both the
environment in the later medieval period and the possible causes of climatic change
on the century time scale. > The available evidence suggests that the MWP was global in extent and not uniform
climatically. https://link.springer.com/article/10.1007%2FBF01092411 > Dating of organic material closely associated with moraines in many montane regions has reached the point where it is possible to survey available information concerning the timing of the medieval warm period. The results suggest that it was a global event occurring between about 900 and 1250 A.D., possibly interrupted by a minor readvance of ice between about 1050 and 1150 A.D. The other citation they used is: https://en.wikipedia.org/wiki/Medieval_Warm_Period#cite_note... https://science.sciencemag.org/content/342/6158/617 > The findings support the view that the Holocene Thermal Maximum, the Medieval Warm Period, and the Little Ice Age were global events, and they provide a long-term perspective for evaluating the role of ocean heat content in various warming scenarios for the future. https://en.wikipedia.org/wiki/Medieval_Warm_Period#cite_ref-... https://books.google.ca/books?id=z-BWE4iCrfYC&pg=PA134&redir... > "They conclude that the Medieval Warm Period was a global event" |