sponge width

[seashellingolds]

Hello

I am wondering if there is a quick way to estimate the sponge layer width and the multiple of visc in ROMS according to the resolution and velocity etc

thanks very much

[seashellingolds]

no rule to choose this? (I am also doubting if this question is naive?)

[rsoutelino]

I don't know if there are any rules of thumb for this, but I generally define the sponge layer size based on the horizontal scale of the dominant phenomena I'm interested in, following what is suggested in Marchesiello et al. (2001)-Oc.Mod.