The added value of the multi-system spread information for ocean heat content and steric sea level investigations in the CMEMS GREP ensemble reanalysis product

摘要: Since 2016, the Copernicus Marine Environment Monitoring Service (CMEMS) has produced and disseminated an ensemble of four global ocean reanalyses at eddy-permitting resolution for period from 1993 to present, called GREP (Global Reanalysis Ensemble Product). This dataset offers possibility investigate potential benefits a multi-system approach reanalyses, since span by construction same spatial temporal scales. In particular, our investigations focus on added value information spread, implicitly contained in ensemble, temperature, salinity, steric sea level studies. It is shown that spite small size, spread capable estimating flow-dependent uncertainty mean, although proper re-scaling needed achieve reliability. The members also exhibit larger consistency (smaller spread) than their predecessors, suggesting advancement with time reanalysis vintage. crucial monitoring climate ocean, even regional level, as shows CMEMS high-resolution products complement estimates estimates. Further applications include impact changes observing networks; use multi-model anomalies hybrid ensemble-variational retrospective analysis systems, which outperform static covariances represent promising application GREP. Overall, product found significantly contribute requirement climatic datasets.