Obs4MIPs User requirements and gap analysis report

This report was commissioned by ESA CCI to inform the future evolution of Obs4MIPs (Teixeira et al., 2014). Obs4MIPs is a database containing observational Climate Data Record (CDR) data in a format designed to facilitate easy intercomparison with model output. This activity was initially driven by the Coupled Model Intercomparison Project (CMIP) as part of the World Climate Research Programme (WCRP) (Waliser et al., 2020). This report consolidates the information gathered through interviews with 36 climate scientists carried out by CMUG during July-November 2024, it also includes a section on gap analysis from Alison Waterfall (CEDA) and recommendations on the treatment of uncertainty within obs4MIPS from Claire Bulgin (University of Reading).