Northern Hemsphere...
OK the data is for the Northern hemisphere....
Well besides not knowing how they ESTIMATED the temperature I see a HUGE RED FLAG during the Medieval Warming Period. The temps during this period were MUCH HIGHER in Europe, Iceland, Greenland, and North America. We don't know whether this phenom extended beyond these areas.... Again we did not have thermometers back then...
To show theses temps to be lower than today then the temps in Asia must have been VERY LOW to drag the data down.... So I would love to know how they estimated this temp data...
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