Substantial carbon drawdown potential from enhanced rock weathering in the United Kingdom
Substantial carbon drawdown potential from enhanced rock weathering in the United Kingdom
复制标题
英国岩石风化作用增强的碳排放潜力
DOI：
10.1038/s41561-022-00925-2
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发表时间：
2022-04-25
影响因子：
18.3
通讯作者：
Beerling, David J.
中科院分区：
文献类型：
--
作者：
Kantzas, Euripides P.;Martin, Maria Val;Beerling, David J.
要实现净零碳排放的国家目标，将需要与不断增长的农业生产相适应的大气二氧化碳消除战略。实现这些目标的一种可能的方法是加强岩石风化，这涉及到用破碎的硅酸盐岩石(如玄武岩)来改良土壤。在这里，我们使用动态碳预算模型来评估在英国耕地上实施强化岩石风化战略的二氧化碳清除潜力和农业效益。我们发现，到2050年，加强岩石风化可以为英国带来6-30MtCO(2)年(-)(1)的二氧化碳净清除量，相当于全国实现净零排放所需大气碳清除量的45%。这表明，加强岩石风化可以在国家气候缓解战略中发挥关键作用，如果它在国家政治、地方社区和农场范围内得到接受的话。我们证明，消除将岩石磨成细小粒度所需的能源需求是可行的。加强岩石风化的共同好处包括，一氧化二氮(第三大温室气体)的大幅缓解，土壤酸化的普遍逆转，以及减少化肥使用量带来的可观成本节约。我们的分析为其他国家实现二氧化碳减排雄心和农业脱碳提供了指导--农业是温室气体的关键来源。根据耦合的气候-碳-氮循环模型模拟，加强英国农田的岩石风化可以在农业协同效益的同时，带来大量的大气二氧化碳去除。
Achieving national targets for net-zero carbon emissions will require atmospheric carbon dioxide removal strategies compatible with rising agricultural production. One possible method for delivering on these goals is enhanced rock weathering, which involves modifying soils with crushed silicate rocks, such as basalt. Here we use dynamic carbon budget modelling to assess the carbon dioxide removal potential and agricultural benefits of implementing enhanced rock weathering strategies across UK arable croplands. We find that enhanced rock weathering could deliver net carbon dioxide removal of 6-30 MtCO(2) yr(-)(1) for the United Kingdom by 2050, representing up to 45% of the atmospheric carbon removal required nationally to meet net-zero emissions. This suggests that enhanced rock weathering could play a crucial role in national climate mitigation strategies if it were to gain acceptance across national political, local community and farm scales. We show that it is feasible to eliminate the energy-demanding requirement for milling rocks to fine particle sizes. Co-benefits of enhanced rock weathering include substantial mitigation of nitrous oxide, the third most important greenhouse gas, widespread reversal of soil acidification and considerable cost savings from reduced fertilizer usage. Our analyses provide a guide for other nations to pursue their carbon dioxide removal ambitions and decarbonize agriculture-a key source of greenhouse gases.Enhancing rock weathering across UK croplands could deliver substantial atmospheric carbon dioxide removal alongside agricultural co-benefits, according to coupled climate-carbon-nitrogen cycle model simulations.