The worldwide CO2 emissions in the last 10-15 years have been underestimated by 8-15% because of the data fabrication, caused by the IPCC process. See Notes on FAO-FRA 2010. The implication is that all physical models of the carbon cycle that agree with the official data are wrong. That is, one more time wrong.
My original paper Simple Equation of Multi-Decadal Atmospheric Carbon Concentration Change is back in review because of various doubts, but some parts of it are not affected and still valuable. I apologize to the readers of the original paper for possible errors.