“…The NDIR sensor can detect CO 2 uptake variations for the above-ground biomass owing to changes in various topographical parameters and interactions between variables that affect the changes in the rate of photosynthesis in the above-ground biomass. (19,20) Although the CO 2 signal detected by the NDIR sensor contains information on actual CO 2 reduction and emission from the forestry carbon project site, the PDD carbon stock is not only based on historical data but also does not Table 4 Comparison between portable NDIR CO 2 sensors and sensor used to calculate carbon stock in PDD.…”