not to side track but there is a lot of discussion on the accuracy of ice core CO2 data. Seems it appears that the ice core data represents a long-term, low-frequency moving average of the atmospheric CO2 concentration; while leaf stomata yields a high frequency component. GEOCARB data also suggests that ice core CO2 data are too low. Whatever proxy you use it is evident that temperature has always led CO2 by anywhere from 200 to years to over a thousand depending on the location of the core samples
"A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects."
— Robert Heinlein, Time Enough for Love