Negative emissions from BioEnergy use, carbon capture and sequestration (BECS)―the case of biomass production by sustainable forest management from semi-natural temperate forests

摘要

In this paper, we show how nature oriented forestry measures in a typical temperate forest type in combination with bioenergy systems could lead to continuous and permanent removal of CO_2 from the atmosphere. We employ a forest growth model suited for modeling uneven-aged mixed temperate stands and analyze the interaction with biomass energy systems that allow for CO_2 removal and long-term sequestration in geological formations. On global scales this technological option to convert the global energy system from a CO_2 emitter to a CO_2 remover has been overlooked by both the science and policy communities. Removal of the major Greenhouse Gas (GHG) CO_2 from the atmosphere is possible using biomass energy to produce both carbon neutral energy carriers (e.g., electricity and hydrogen) and, at the same time, offer a permanent CO_2 sink by capturing carbon at the conversion facility and permanently storing it in geological formations. This technological option resolves the issues of permanence and saturation of biological sinks while at the same time this option respects the multiple benefits of sustaining diverse, healthy, and resilient forests. Our results indicate that a typical temperate forest in combination with capturing and long-term storage can permanently remove and on a continuous basis about 2.5 t C yr~(-1) ha~(-1) on a sustainable basis respecting the ecological integrity of the ecosystem.