Quantifying numerical mixing in a tidally forced global eddy-permitting ocean model
Alex Megann
Abstract:An ensemble of experiments based on a ¼° global NEMO configuration is
presented, including tidally forced and non-tidal simulations, and using
both the default z* geopotential vertical coordinate and the
z~ filtered Arbitrary Lagrangian-Eulerian coordinate,
the latter being known to reduce numerical mixing. This is used to
investigate the sensitivity of numerical mixing, and the resulting model
drifts and biases, to both tidal forcing and the choice of vertical
coordinate. The model is found to simulate an acc… Show more
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