Tom Reershemius
Yale
A key challenge that ERW must meet in order for the practice to viably scale up is reliable monitoring, reporting, and verification of CDR. A step towards this is measuring the extent of weathering of deployed feedstocks in situ. This can theoretically be achieved by measuring changes in soil elemental concentration – but a major barrier to this is soil chemical heterogeneity. I will discuss the magnitude of heterogeneity in soil chemistry using data from a range of field sites and how it relates to making measurements for MRV of ERW in practice, and how sampling and data analysis can help to reduce the impact of sampling uncertainty.
