Sathyanadh et al. (2025): Efficacy of individual and combined terrestrial and marine carbon dioxide removal
Anusha Sathyanadh, Homa Esfandiari, Timothée Bourgeois, Jörg Schwinger, Tommi Bergman, Antti-Ilari Partanen, Matvey Debolskiy, Miriam Seifert, David Keller and Helene Muri, IN: Environmental Research Letters, https://doi.org/10.1088/1748-9326/ae2af5
Limiting global temperature rise below 2 °C requires significant reduction in greenhouse gas emissions and likely large-scale carbon dioxide removal (CDR). This study assesses the CO₂ sequestration and efficacy of two CDR approaches, Bioenergy with Carbon Capture and Storage (BECCS) and Ocean Alkalinity Enhancement (OAE), applied individually and in combination. Using the Norwegian Earth System Model (NorESM2-LM), simulations were designed to ramp up deployment of BECCS and OAE, to an additional area of 5.2 million km² by 2100 for bioenergy feedstock for BECCS, and a CaO deployment rate of approximately 2.7 Gt/year for OAE within the exclusive economic zones of Europe, the United States and China.