The Other Hockey Schtick {CO2 Levels}

Problem: Ice core data on CO2 levels doesn't match modern infrared absorption measurements from Mauna Loa.

Solution: As noted here, "an ad hoc assumption, not supported by any factual evidence, solved the problem: The average age of air was arbitrarily decreed to be exactly 83 years younger than the ice in which it was trapped (Jaworowski 1994 & 1992)."  I have added the red arrow to illustrate the arbitrary data shift of 83 years to match up ice core data with modern measurements of CO2 at Mauna Loa, an active volcano with elevated levels of CO2.

read more at the link above