Clarkson et al. (2024): A review of measurement for quantification of carbon dioxide removal by enhanced weathering in soil

Matthew O. Clarkson, Christina S. Larkin, Philipp Swoboda, Tom Reershemius, T. Jesper Suhrhoff, Cara N. Maesano, James S. Campbell IN: Frontiers in Climate, 6, https://doi.org/10.3389/fclim.2024.1345224

Terrestrial enhanced weathering (EW) involves the acceleration of natural weathering processes via the deployment of crushed rock feedstocks, typically Ca- and Mg-rich silicates, in soils. While models predict this has the potential to remove multiple gigatonnes of CO₂ annually, as an open-system pathway, the measurement (monitoring), reporting, and verification (MRV) of carbon removal and storage is challenging. Here the authors provide a review of the current literature showing the state-of-play of different methods for monitoring EW. The authors focus on geochemical characterization of weathering processes at the weathering site itself, acknowledging that the final storage of carbon is largely in the oceans, with potential losses occurring during transfer.

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