As a result, I believe warming from man's Co2 will be small and manageable, and may even been unnoticeable in the background noise of natural variations. (climate-skeptic.com)
In short, we can not presently seperate the signal of CO2 from the noise of natural variation. (wattsupwiththat.com)
Warm records are set through the 1930s and 40s, with a long stretch of no records until the 1980s, when the global warming signal firmly emerges from the noise of natural variation. (climatecentral.org)