CO2 Storage in Permafrost

More precisely, the evidence shows thst permafrost assists in storing carbon in plants in less.  8/30/25 Phys.org:

"Carbon dioxide levels in the atmosphere vary naturally between ice ages and interglacial periods. A new study by researchers at the University of Gothenburg shows that an unexpectedly large proportion of carbon dioxide emissions after the ice age may have come from thawing permafrost."

If you look at long-term graphs of CO2 and global temperature, you often see temperatures rise before CO2 increases.  So CO2 may be the symptom not the cause.