A Comparative Parametric Study on Dynamic Biogenic Carbon of Harvested Wood Products: Biomass Rotation Period vs. Product Lifetime

Harvested wood products (HWPs) are a class of products that are recognized for their potential to mitigate climate warming: the absorption of CO2, which is necessary to the growth of their biomass feedstock, temporarily reduces the amount of CO2 present in the Earth's atmosphere, effectively mitigating global warming. This study decided to look into the effect of changing two important parameters associated with HWPs: the rotation period of the biomass used for their raw material (effectively, the rate of CO2 absorption), and the length of their lifetime (effectively, the amount of time the captured carbon is stored within them in the form of embodied carbon). For this purpose, a carbon accounting calculator, Quantis' Biogenic Carbon Footprint Calculator for Harvested Wood Products (BCFC-HWP), was employed. The Biogenic Global Warming Potential (GWP(bio)) metric, which was used by the BCFC-HWP to describe the climate impact of a wooden product's embodied carbon, was analyzed for its evolution with respect to the two identified parameters. The results showed that while GWP(bio) followed a consistent decrease with respect to the product lifetime parameter, it showed a non-consistently evolving trend with respect to biomass rotation period i.e. first decreasing then increasing. This made the confrontation of both parameters' effect complex mathematically, such that no clear-cut conclusions on the relative benefits of changing one parameter versus the other were made. Nonetheless, a valuable resolution was made based on the observations regarding the evolution of GWP(bio) with respect to the lifetime of an HWP: the results indicated that extending the lifetime of an HWP is an advantageous strategy in decreasing the climate effect of the considered product.