International review of current MRV initiatives for soil carbon stock change assessment and associated methodologies

The primary aim of this review is to provide an inventory of current MRV initiatives with a focus on croplands, grasslands and forests, and to evaluate their main characteristics along the lines recommended by the CIRCASA project (Smith et al. 2020). This will serve to identify possible ‘building blocks’ and associated methodologies for a ‘cookbook’ (blueprint) towards an MRV framework applicable to different contexts (e.g., national and subnational reporting, CAP, voluntary C market, insetting/supply chain) and at different levels of complexity (Tiers) depending on the context of application and the availability/accuracy of input data.