by Richard S. Courtney
New plot to compare with Figure 1
Compare Richard Courtney’s Figure 1 with the figure below that I (Ed) plotted using IPCC-approved data with monthly resolution with the bonus that the data extend to 2015.
The plot shows that Richard Courtney’s Figure 1 is correct. The annual change in the Mauna Loa data is calculated by subtracting the data for 12-months prior from the data for each month.