According to the Intergovernmental Panel on Climate Change (IPCC) terminology for forest carbon accounting:
Carbon Stock: The absolute quantity (mass) of carbon stored in a designated carbon pool (such as aboveground biomass, belowground biomass, deadwood, litter, or soil organic matter) at a specific point in time (expressed in tonnes of carbon or \(\text{t C}\)).
Carbon Flux: The rate of carbon transfer between pools per unit of time.
Carbon Pool: A reservoir that has the capacity to accumulate or release carbon.
IPCC की परिभाषा के अनुसार, किसी निश्चित समय पर किसी कार्बन पूल (जैसे बायोमास, मृदा या लिटर) के भीतर संग्रहीत कार्बन की कुल पूर्ण मात्रा को कार्बन स्टॉक (Carbon Stock) कहा जाता है।