It cannot be the case in the recent warming because the ratio in stable isotopes of CO2 (13C/12C) shows clearly a decrease (the scale is in reverse in the figure). While volcanic and marine CO2 are closer to the standard (aka zero by definition). Thus if they were the origins of the recent increase in CO2, the ratio should have moved in the other direction. See this link for explanation: https://www.wired.com/2015/04/volcan...xide-addendum/It discredit conventional knowledge that C02 is the cause of global warming, as I said before C02 was the byproduct of the heat causing more carbon to be released & had no apparent effect on climate.
Detection of radioactive carbon point the finger squarely on volcanic activity. The lag in C02 was not due to a lag in the ice holding it.
Geological stratus samples confirm this, & plant carbon has been recorded from fossils, confirming heat came before carbon; typically volcanoes are the cause in 99.9% of the cases.
Good try, but this is a bad idea to use this kind of argument against a geochemist.