CRANE-tools.org

Abstract

In agreement with the National Academies of Sciences report, biomass carbon sequestration in this model includes "terrestrial carbon removal and sequestration... [i.e.] land use and management practices such as afforestation/reforestation, changes in forest management, or changes in agricultural practices that enhance soil carbon storage ("agricultural soils")" and "coastal blue carbon [i.e.] land use and management practices that increase the carbon stored in living plants or sediments in mangroves, tidal marshlands, seagrass beds, and other tidal or saltwater wetlands." These approaches are ready for large-scale deployment, but are limited in scale by land availability and the potential to affect food availability, food prices, national security, and biodiversity. Furthermore, these options "are reversible if the carbon sequestering practices are not maintained... In contrast, BECCS, direct air capture, and carbon mineralization have comparatively minor issues of permanence." This model, the Direct air capture model, and the Ocean carbon sequestration model are special cases within CRANE. Specifically, the "incumbent technology" in these scenarios is a business-as-usual scenario where no CO2 capture is performed. This solution is therefore not targeted at improving, or mitigating the emissions from any particular technology, but rather all annual emissions that are available to be mitigated. Thus, the rate at which this technology is implemented, i.e. the shape of the market penetration curve, is the key consideration of the model. Many factors will influence this adoption rate and it is left to the user to modify the model's default assumptions based on their best estimates of these factors. Report generated using CRANE tool v1.0