ALT A) a map of the Bering Sea study area showing the ocean bathymetry. B) a map showing the > 6 million satellite wave height observations analyzed, with the largest waves on top, to show where waves have the largest impact.

ALT 100 randomly subsampled trajectories from 180 days of simulation on (a) fineresolution and (b) coarsened fields, and using coarsened fields in combination with (c) the diffusive parameterization and (d) Markov-1. While the domain is periodic, here we tile it in the zonal direction, to separate particles crossing the zonal periodic boundaries. The -3900m isobath is plotted with dashed grey lines, indicating the location of the ridge in the periodic channel.