Evolution of simulated seasonal and interannual ocean carbon budgets for the global ocean and exclusive economic zones in CMIP6 earth system models: Benchmarking for better prediction

Climate and Earth System Models still struggle with the seasonal evolution of ocean carbon exchange and budgets. With the advent of new near-real-time ocean biogeochemical data from argo floats and global biogeochemical data assimilation in the ocean, we should be able to benchmark and evaluate the earth system model simulations of seasonal and interannual net fluxes of carbon into the global ocean as well as regional and exclusive economic zone carbon budgets. We present results using metrics suitable for ESMValTool deployment to quantify and benchmark the carbon budgets in the CMIP6 simulations for the end of the historical period. We compare these results to the new BGOSE assimilation (global at 1/3°) as well as the observationally-derived carbon surface carbon data products.