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Climate Research From Briffa, Esper, Jones, Moberg & Mann All Confirm The Extreme Medieval Warming

The science is in!
During U.S. Senate testimony (2005), evidence was presented that revealed multiple studies supporting a consensus that the Medieval Period experienced extreme warming that matches or exceeds any modern, post-1970's warming. The multi-graph below represents the research from major climate researchers that was presented at the Senate testimony. It's of interest to note that none of these scientists are considered global warming "skeptics." (Source of multi-graph from 2005 testimony.)

Besides these studies, hundreds of scientists have conducted research that more often than not, confirm that Medieval Warming was unprecedented. For a quick review of historical climate charts that show this, go here. In addition, C3 has compiled a page that includes climate-history, with and without charts.

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