Adaptation of NEMO-LIM3 model for multigrid high resolution Arctic simulation

10/08/2018

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by   Alexander Hvatov, et al.

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Arctic ocean modelling is a complex, computationally-intensive task that often requires the use of models of different scales. The ice-ocean model NEMO-LIM3 required several modifications to run multigrid simulations of Arctic seas properly. Firstly, we generate a custom stereographic curvilinear grid to decrease distortions and improve the effectiveness of spatial coverage. Then, we improve the ice and tracer boundary conditions, allowing us to implement the correct interaction between coarse and refined grids through a long open boundary. Finally, we integrate a heat flux-based ice restoration algorithm into the model, which enables the annual ice dynamics to reach quasi-equilibrium with a reduced spin-up time