In the latest rendition of Salby Tunes Eli wandered over to the Scottish Sceptic's summary of Murry Salby's talk in Edinburgh. The Scep did a reasonable job of summarizing the talk, which appears of a piece with Salby's Hamburg seminar. That was well shredded by the Weasel in penance for his sins. Still, there does appear to be something new, Salby is now claiming that the increase in CO2 mixing ratio is due to thermal decomposition of soils.
Eli was feeling obscure at the time so the Bunny inquired
Now Eli is but an ‘umble Rabett, innocent as the bunnies of the field, a little bunny foo foo as it were, (fair warning) and it occurs to him that there is a significant indicator of CO2 emission by combustion and not warming, contained in the Keeling curve but not much remarked upon and certainly not mentioned by the Good Dr. Salby, Ph.D. Perhaps the Scottish Skeptic would like to play? Here is a giant hint, what happens during combustion.which confused everyone including Wotts.who was also at play, but Eli offered other hints "Well, here is another giant hint, which Keeling?
The answer of course is Ralph Keeling who took over the family business, adding a new line in the last quarter century of oxygen molecule concentrations. Eli's argument is really simple. If combustion is the reason for increase in CO2 mixing ratio then the concentration of oxygen should decrease. If Salby is right, not so much.
So let us go to the tape.
The loss roughly matches the amount of fossil fuels that have be burned when one takes into account the amount of water vapor produced by combustion from hydrogen in the fuel. The seasonal variation reflects the growth and decay of plants. The differences can be related to fluxes into and out of the land and oceans.
Unfortunately so do we all.