Applying Econometrics to the Carbon Dioxide “Control Knob”

Figure 2

Trends in annual changes in annual mean temperatures and average annual [CO₂] Mauna Loa Slope Observatory 1977–2009. Notes: neither of the trends has good linear fits, with 𝑅²<0.1, and there is in fact no discernible trend in changes in the annual mean temperature at Mauna Loa. Temperature data at Mauna Loa are not included in any of the Hadley-CRU, GCHN, and Gistemp data sets.