Simulating carbon capture by enhanced weathering with croplands: an overview of key processes highlighting areas of future model development

Lyla L. Taylor, David J. Beerling, Shaun Quegan, Steven A. Banwart Abstract Enhanced weathering (EW) aims to amplify a natural sink for CO2by incorporating powdered silicate rock with high reactive surface area into agricultural soils. The goal is to achieve rapid dissolution of minerals and release of alkalinity with accompanying dissolution of CO2into soils and drainage waters. EW could counteract phosphorus limitation and greenhouse gas(GHG) emissions in tropical soils, and soil acidification, a common agricultural problem studied with numerical process models over several decades. Here, we review the processes leading to soil acidifica...