[C==]

The long-term carbon cycle is in equilibrium, that is [C=] when the amount of carbon emitted into the short-term carbon cycle by fossil fuel emissions  is equal to the amount of carbon sequestered by from the short-term carbon cycle by pyrolysis and the production of char as [C–].


[C=]

The short term carbon cycle is in equilibrium, that is [C=] when the amount of carbon transferred from biomass into the atmosphere  is equal to the amount of carbon transferred  from the atmosphere into biomass by photosynthesis.