增强碱度能否持久封存碳？

Key questions remain about carbon removal strategies in open environmental systems Terry Isson1 and A. Joshua West2 Oceans have absorbed about 30% of anthropogenic carbon dioxide (CO2) emissions (1). However, this natural carbon storage mitigates climate change at the cost of ocean acidification and ecosystem degradation. Alkalinity enhancement approaches such as enhanced rock weathering—a strategy in which cation-bearing materials (silicates and carbonates) are applied to land or water—can counteract ocean acidification and increase CO2 storage capacity of the hydrosphere. These alkaline substances react with water, dissolving to release associated cations and alkalinity, promoting conversion of CO2 into dissolved inorganic carbon that can contribute to long-term ocean storage. …