Jim’s factor of 0.5*Anthro is actually a brilliant insight, as it does explain in a simple fashion how the excess CO2 is performing a random walk in the ocean, performing no service other than to increase the ocean’s acidification levels.
Then Edim says this:
“The problem is, delta[CO2]/delta[t] is dependent on temperature. The curves are almost identical.”
Which means that Edim must have seen this bit of data mining showing the match to seasonal fluctuations:
http://2.bp.blogspot.com/-AoUzuwoFQyA/T29AMKmFP7I/AAAAAAAABB8/O58gpDrQ-r4/s1600/co2_sst.gif
So not only do the top-tier climate scientists have a perfect accounting of all anthro CO2 increases, they also can account for the seasonal fluctuation on top of the rising Mauna Loa CO2 curve. They have the understanding of the carbon cycle down to a gnat’s whisker!