This has all come from the US Department of Commerce | National Oceanic & Atmospheric Administration | NOAA Research and I’m finding it very interesting. Over a 50 year period the oscillation is very consistent


Looked at on a finer timescale its a smooth sinusoid on top of a steady rise.


Monthly mean atmospheric carbon dioxide at Mauna Loa Observatory, Hawaii The carbon dioxide data, measured as the mole fraction in dry air, on Mauna Loa constitute the longest record of direct measurements of CO2 in the atmosphere. They were started by C. David Keeling of the Scripps Institution of Oceanography in March of 1958 at a facility of the National Oceanic and Atmospheric Administration (Keeling, 1976). NOAA started its own CO2 measurements in May of 1974, and they have run in parallel with those made by Scripps since then (Thoning, 1989). The black curve represents the seasonally corrected data.

For more detail and background click below.

After you get past the fact that even though billions has been spent, the rate of increase in CO2 is  still rising. Note the oscillation however and think about it. Why should there be a seasonal fluctuation as there is no way that our production of CO2 can vary like this. Going up is easy - simply burn more carbon but I know of no mechanism for driving it down again at this rate. It has to be that there is another mechanism at work. The front runner is water temperature and CO2 coming out of solution as temperature rises and going back as temperature falls however its not quite in synch. CO2 is highest during rising temperature and lowest during falling temperature and is not then a simple function of temperature per-se but rate of change of temperature.


This graph is clearly showing strong correlation with the atmospheric temperatures in the short term but the Met Office (Hadley Centre) figures are not showing the temperature rise that should be driving it up overall.

The bottom line however is that temperature is driving CO2 not CO2 driving temperature.