Zhu et al. (2025): Assessing the efficacy of river-based ocean alkalinity enhancement for carbon sequestration under high emission pathways
Xiao-Yuan Zhu, Shasha Li, and Wei-Lei Wang, IN: EGUsphere, https://doi.org/10.5194/egusphere-2025-2536
Among various proposed geoengineering methods, ocean alkalinity enhancement (OAE) stands out as a unique solution. By mimicking natural weathering processes, OAE can simultaneously enhance oceanic carbon uptake and mitigate ocean acidification. However, the full efficacy and potential side effects of OAE remain to be fully understood. To evaluate the efficacy of OAE through natural pathways via rivers, the authors applied a 5-fold alkalinity flux increase (OWE5) at the mouths of global rivers from 2020 to 2100 in a fully coupled Earth System Model under a high-emission scenario (SSP585).