Soil porewater chemistry underpins the quantification of carbon dioxide removal (CDR) in enhanced rock weathering (ERW), where alkalinity and dissolved ion measurements are used within Monitoring, Reporting, and Verification (MRV) frameworks to validate carbon credits.However, the reliability of these measurements depends on the extraction method, with many in-field techniques constrained by soil moisture availability.This dependence can limit data continuity, reduce comparability across sites and seasons, and introduce uncertainty into CDR-relevant interpretations.Here, we present and evaluate a new soil porewater extraction method, SATuration-Centrifugation (SAT-C), designed to obtain porewater from a defined soil volume independent of moisture conditions.The method combines saturation of intact soil cores using deionized water with centrifugation to recover porewater for chemical analysis.We compare SAT-C with conventional rhizon sampling using soils collected from grassland field sites, including sites amended with crushed basalt as part of ERW
Skov et al. (Mon,) studied this question.