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The reduction of computational costs for marine ecosystem models is importantfor the investigation and detection of the relevant biogeochemical processesbecause such models are computationally expensive. In order to lower thesecomputational costs by means of larger time steps we investigated the accuracyof steady annual cycles (i.e., an annual periodic solution) calculated withdifferent time steps. We compared the accuracy for a hierarchy ofbiogeochemical models showing an increasing complexity and computed the steadyannual cycles with offline simulations that are based on the transport matrixapproach. For each of these biogeochemical models, we obtained practically thesame solution even though larger time steps. This indicates that larger timesteps shortened the runtime with an acceptable loss of accuracy.

Shortening the runtime using larger time steps for the simulation of marine ecosystem models