Enhanced weathering (EW) scenarios are analyzed using the model presented in Cipolla et al. (2020). We explore the role of different hydroclimatic forcing on carbon-sequestration efficiencies. We also investigate whether increasing soil carbon content improves weathering conditions. We link olivine weathering rates to pH variations and quantify the suitability of hydroclimatic regimes to EW, based on rainfall intensity and frequency. The results show that the amount of ${\text{CO}}_2$ reacting with olivine and ending up in solution in the form of ${\text{HCO}}_3^{-}$ and ${\text{CO}}_3^{2-}$ increases with mean annual precipitation (MAP) up to 2000 mm, but then tapers off for higher MAPs. On the contrary, the sequestered ${\text{CO}}_2$ continues to grow with MAP in a more significant way. We also quantify the increase of nutrients availability, especially when MAP exceeds 2000 mm. Lastly, the results suggest that organic matter amendments are more effective in humid environments (MAP higher than 2000 mm), confirming the central role of hydrologic processes on EW.

使用 Cipolla 等人提出的模型分析增强风化 (EW) 情景。(2020)。我们探索了不同水文气候强迫对碳封存效率的作用。我们还调查了增加土壤碳含量是否会改善风化条件。我们将橄榄石风化率与 pH 值变化联系起来，并根据降雨强度和频率量化水文气候状况对 EW 的适用性。结果表明，用量${\text{二氧化碳}}_2$ 与橄榄石反应并最终以溶液的形式存在 ${\text{碳酸氢钠}}_3^{-}$ 和 ${\text{二氧化碳}}_3^{2-}$随平均年降水量 (MAP) 增加到 2000 毫米，但随着 MAP 的升高而逐渐减小。相反，被隔离的${\text{二氧化碳}}_2$继续以更重要的方式与 MAP 一起增长。我们还量化了养分可用性的增加，尤其是当 MAP 超过 2000 毫米时。最后，结果表明有机质修正在潮湿环境（MAP 高于 2000 毫米）中更有效，证实了水文过程对电子战的核心作用。