Impact of Climate on the Global Capacity for Enhanced Rock Weathering on Croplands

Seung H. Baek, Yoshiki Kanzaki, Juan M. Lora, Noah Planavsky, Christopher T. Reinhard, Shuang Zhang Abstract Enhanced rock weathering (ERW) on croplands has emerged as an economically and ecologically promising negative emissions technology. However, estimated total carbon sequestration potential from ERW on croplands and its potential sensitivity to climate conditions requires further understanding. Here we combine 1-D reactive transport modeling with climate model experiments to simulate ERW on ∼1,000 agricultural sites globally. Applying a fixed rate of 10 tons of basalt dust per hectare on these sites sequesters 64 gigatons of CO2 over a ...