In this WP we will establish the performance and projection traceability of standard (CMIP6) resolution ESMs compared to lower resolution equivalent versions of the same models. This will aid in efficiently sampling a matrix of future emission scenarios (WP10 and ScenarioMIP), by state of the art ESMs.
A range of methods for efficiently sampling these scenarios will be investigated in WP11. One option, explored in this WP, is to use in addition to a small number of standard (CMIP6) resolution ESMs, a set of lower resolution, computationally efficient, ESMs based directly on the standard CMIP6 models. This approach requires that the lower resolution models reproduce the simulation quality and future projection response of the standard resolution (parent) models to an acceptable degree. The aim of the WP is to explore and document this traceability and use this to inform strategies for sampling CMIP6 and other community scenarios.