Araujo & Santos (2025): Soil Calcimetry Dynamics to Monitor Weathering Flux: Method Calibration in Wollastonite-Amended Croplands – Preprint

Francisco SM Araujo and Rafael M Santos, IN: Preprints.org, doi: 10.20944/preprints202509.2142.v1

Enhanced Rock Weathering (ERW) is a promising carbon dioxide removal (CDR) strategy that accelerates mineral dissolution, sequestering atmospheric CO₂ while improving soil health. This study builds on prior applications of soil calcimetry by investigating its ability to resolve short-term carbonate fluxes and rainfall-modulated weathering dynamics in wollastonite-amended croplands. Conducted over a single growing season (May–October 2024) in temperate row-crop fields near Port Colborne, Ontario—characterized by lacustrine clay soils and variable rainfall—the study tests whether calcimetry can differentiate between dissolution and precipitation phases and serve as a proxy for total weathering flux within the sentinel layer.

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