text: In lockstep with temperature, IPCC scientists needed to show a monotonic increase in CO2 such that the correlation with temperature was apparent at least since 1950/1960.So CO2 records have also been manipulated. One manipulation was the arbitrary changing of the age of the gas trapped in the upper part of an ice core, where the pressure changes were less drastic than in the deeper parts. In the upper part of the core, taken from Siple, Antarctica, the ice was deposited in the year 1890, and the CO2 concentrationin it was 328 ppmv (Friedli et al. 1986, Neftel et al.1985), and not the 290 ppmv needed to prove the man-madewarming hypothesis. The same CO2 concentration of 328ppmv was measured in the air collected directly from the atmosphere at the Mauna Loa volcano, Hawaii, 83 years laterin 1973 (Boden et al. 1990). So, it was shockingly clear thatthe pre-industrial level of CO2 was the same as in the second half of the 20th Century.To solve this problem, these researchers simply made an ad hoc assumption: The age of the gas recovered from 1 to 10 grams of ice was arbitrarily decreed to be exactly 83 years younger than the ice in which it was trapped! This was notsupported by any experimental evidence, but only by assumptions which were in conflict with the facts (Jaworowski 1994a,Jaworowski et al. 1992b). The corrected proxy ice data were then smoothly aligned with the direct atmospheric measurements