We should begin using ClimaSeaIce.jl. One consideration is that we'll need to compute ocean/sea ice fluxes in this more complex case. We have two options here: add these flux calculations to SurfaceFluxes.jl or ClimaCoupler.jl so that each component in ClimaCoupler is distinct, or use ClimaOcean (which already implemented ocean/ice fluxes) and have a coupled ocean/sea ice within the larger coupled simulation. We need to decide which approach is preferred.

As of 9/25/25 we'll try implementing them separately, and call ClimaOcean functions to compute the ocean/sea ice fluxes.