ABSTRACT

Forestry sequestrates carbon from the atmosphere and stores it in living tree biomass, dead organic matter (DOM) and wood-based products. A part of the sequestration might be “additional“, i.e., increased sequestration compared to the business as usual forestry. This study developed a methodology for calculating the additional part of the carbon sequestration of Finnish forestry. Additionality was defined to be equal to increasing the carbon stocks beyond a reference level, which was equal to the carbon socks of current Finnish forestry. Models were developed for calculating the reference carbon stocks of living tree biomass, DOM and wood-based products, using site fertility and temperature sum as predictors. New models were also developed for initializing the carbon stocks of DOM and wood-based products. These models were used in simulations that predict the future changes of the carbon stocks in a given forest management scenario. The model system developed in this study makes it possible to calculate the future carbon stocks and additional carbon sequestration of any Finnish forest area in alternative forest management scenarios. The use of the system was demonstrated in three case study forests for two different management scenarios.

摘要

林业从大气中隔离碳，并将其储存在活树生物量、死有机物 (DOM) 和木质产品中。封存的一部分可能是“额外的”，即与照常经营的林业相比增加了封存。本研究开发了一种计算芬兰林业碳封存额外部分的方法。额外性被定义为等于将碳储量增加到超过参考水平，该参考水平等于当前芬兰林业的碳储量。使用场地肥力和温度总和作为预测因子，开发了用于计算活树生物量、DOM 和木制品的参考碳储量的模型。还开发了用于初始化 DOM 和木质产品的碳储量的新模型。这些模型用于预测给定森林管理情景中碳储量未来变化的模拟。本研究中开发的模型系统可以计算在替代森林管理情景中任何芬兰森林区域的未来碳储量和额外的碳固存。该系统的使用在三个案例研究森林中得到了证明，用于两种不同的管理方案。