Burger et al. (2025): Subsurface dissolution reduces the efficiency of mineral-based ocean alkalinity enhancement
Friedrich A. Burger, Urs Hofmann Elizondo, Hendrik Grosselindemann and Thomas L. Frölicher, IN: EGUSphere, https://doi.org/10.5194/egusphere-2025-5917
Most modeling studies assume complete surface dissolution, leaving the impact of subsurface dissolution on ocean carbon uptake poorly understood. Here, the authors develop idealized vertical mineral dissolution profiles that vary with environmental conditions and grain size. These profiles are implemented in a comprehensive Earth system model to assess the capture efficiency of OAE, defined as the additional carbon taken up by the ocean per alkalinity added.