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future projection: to project how climate will change on a global and local scale in the future, forcing changes according to the Shared Socioeconomic Pathway (SSP) 3-7.0 scenario from ScenarioMIP. The SSP3-7.0 scenario explores a future with a continuous increase in CO2 emissions with no strong mitigation efforts. In phase 1, all DestinE simulations follow this scenario. In the future, alternative future scenarios will be explored.
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spinup strategy: for coupled climate simulations, it is essential to bring the ocean close to an equilibrated state before launching the coupled simulation. For the historical simulations, the ocean models are initialised from a reanalysis in 1985, and then forced by ERA5 for 5 years. In 1990, a coupled 2-year spinup with perpetual 1990 forcing start starts from the ocean-only spinup to reduce the coupling shock. This coupled spinup is then used to provide the initial conditions for the historical simulations. For the scenario simulations, the ocean-only spinup is running from 2015 – 2019 with ERA5 forcing and is directly initialising the coupled future projection with no coupled spinup. The Climate DT will continue to explore and improve spinup strategies in the future.
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