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

机译:通过加强农田的风化来模拟碳捕获:关键过程概述突出了未来模型开发的领域

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摘要

Enhanced weathering (EW) aims to amplify a natural sink for CO2 by 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 CO2 into 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 acidification in croplands and how the soil weathering CO2 sink is represented in models. Mathematical models capturing the dominant processes and human interventions governing cropland soil chemistry and GHG emissions neglect weathering, while most weathering models neglect agricultural processes. We discuss current approaches to modelling EW and highlight several classes of model having the potential to simulate EW in croplands. Finally, we argue for further integration of process knowledge in mathematical models to capture feedbacks affecting both longer-term CO2 consumption and crop growth and yields.
机译:增强耐候性(EW)旨在通过将具有高反应表面积的粉状硅酸盐岩石掺入农业土壤中来扩大二氧化碳的天然汇。目标是实现矿物质的快速溶解和碱度的释放,并伴随将CO2溶解到土壤和排水中。 EW可以抵消热带土壤中的磷限制和温室气体(GHG)排放以及土壤酸化问题,这是几十年来使用数值过程模型研究的常见农业问题。在这里,我们回顾了导致农田土壤酸化的过程,以及如何在模型中表示土壤风化的CO2汇。掌握支配农田土壤化学和温室气体排放的主要过程和人为干预的数学模型忽略了风化,而大多数风化模型忽略了农业过程。我们讨论了对电子战进行建模的当前方法,并重点介绍了几类模型,这些模型有可能在农田中模拟电子战。最后,我们主张将过程知识进一步整合到数学模型中,以获取影响长期二氧化碳消耗以及作物生长和产量的反馈。

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