I think it's very likely that heat is leading the CO2 concentrations and not the other way around.
JO
Indeed that is the case as shown by precise graphs. CO2 increases with a lag time of a few hundred years of temperature increases based on plant growth, decomposition, and degassification of the ocean.
From my notes on Unstoppable Global Warming Every 1500 Years by S. Fred Singer
Page 9-10 ... the claim that they've found a "human fingerprint" in the current global warming...was inserted in the executive summary of the IPCC's 1996 report for political, not scientific reasons. The author of the IPCC science chapter, a U.S. government employee, publicly admitted making the scientifically indefensible "back room" changes. He was under pressure from top U.S. government officials to do so.
First, CO2 changes do not account for the highly variable climate...
Second, the Greenhouse Theory does not explain recent temperature changes.
Third, ... the early and supposedly most powerful increases in atmospheric CO2 have not produced the frightening planetary overheating...
Fourth, .. we must discount the "official" temperature record to reflect the increased size and intensity of today's urban heat islands, where most of the official thermometers are located.
Fifth, ... theory says that CO2 will warm the lower atmosphere first... and then the surface.
This is not happening.
Sixth, CO2 for at least 240,000 years has been a lagging indicator (about 800 years) of global warming, not a causal factor.