Global Temperatures are volatile, CO2 is not. The 13 mo average was effectively 0.00 in 1980, and 0.00 in 2011. Temperatures spiked in 1997, CO2 didn’t change much. Temperatures accelerated in 2011, CO2 leveled out. Temperatures dramatically decreased from 1997 to 2008, CO2 increased. Temperatures were literally flat between 1980 and 1996. CO2 increased. While a linear regression may show an uptrend in temperatures over the observed time period temperatures follow largely a series of step ranges. Between 1979 and 1996 temperatures were range-bound between 0.00 and -0.3. An exceptionally strong El Nino broke global temperatures out of that range (most likely due to more sunlight reaching the oceans) and we entered another range with higher bounds. Temperatures then ranged between -0.1 to 0.5, a range we remain in today. There is no consistent uptrend in temperatures like there is in CO2 production and atmospheric concentration.
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