Petit et al. But as you can see, this is in Celsius, but these hard to call cycles, but we'll call them cycles of temperature variation. We've had 1, 2, 3, 4 of them in 400,000 years. So approximately 100,000 year cycles, almost 23 degrees Fahrenheit change in temperature. Now what the senator from Rhode island is all concerned about is a little moment in time here taking a look at charts and blowing them up and doing the hockey stick effect and then freaking out about minute movements over geologic time. (15:57–16:09)
CLAIM
Asserts that there have been four major temperature cycles over 400,000 years, with changes of almost 23 degrees Fahrenheit.
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