Fig. 2: Carbon dioxide emissions from three carbon dioxide removal (CDR) portfolios for different climate targets across the 21st century.
From: Leveraging ecosystems responses to enhanced rock weathering in mitigation scenarios
Three CDR portfolios are assessed: No EW: bioenergy with carbon capture and storage (BECCS) only. EW on CL: enhanced weathering (EW) deployed on croplands (CL) only, and BECCS. EW on CL + F: EW deployed on croplands and forest areas (F), and BECCS. The bars indicate the mean, the black dashes the median, and the 25–75% range. Four climate policy targets are compared (one per column): 1.5 °C with medium overshoot (a, e): The temperature change is limited to 1.5 °C after 2100, with a possible overshoot of up to 0.2 °C before 2100. 1.5 °C with high overshoot (b, f): the temperature change is limited to 1.5 °C after 2100. 2°C with no overshoot (c, g): the temperature change is limited to 2 °C. 2 °C with high overshoot (d, h): the temperature change is limited to 2 °C after 2100. a–d Displays cumulative CDR over the period 2020–2100, while e–h display annual emission and CDR. “EW: supply chain” (in orange) represents the emissions from fossil fuels used to apply EW. The red lines represent the net CO2 emissions.
