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- #61
The "Midieval warm period" can only be measured by trees existing at the time. Therefore, whether there was "global" warming remains yet another theory, depending on which part of Earth tree samples are taken. Your conclusions, Sinatra, by your stretched out chart, are based on computer-generated conceptual data only since such technology didn't exist that long ago. This article sums up nicely the fact that there remain many unknowns about past warming/frigid cycles, especially that one.
http://www.geo.umass.edu/faculty/bradley/bradley2000b.pdf
But if you choose to dispute the science regarding the earth being warmer then - you must also dispute the science indicating the earth is warmer now...