Can turbulence suppress double-diffusively driven interleaving completely?

A linear stability problem is formulated to investigate the effect of turbu lence on double-diffusively driven thermohaline interleaving in rotating me dia. Three cases are considered: (a) intrusions with an alongfront slope in rotating media, (b) intrusions with zero alongfront slope in nonrotating m edia, (c) intrusions with zero alongfront slope, where the Coriolis force i s retained. The physical reason for case c is that the large-scale vertical geostrophic shear in baroclinic fronts will rotate any intrusion with nonz ero alongfront slope as long as the alongfront slope vanishes. In all three cases, turbulence works to suppress interleaving so that the growth rate o f the fastest growing intrusion decreases with the increase of turbulent di ffusivity k*. However, in cases a and b the growing intrusions exist for an y finite value of k*, while in case c there is a marginal (maximum) value o f k* beyond which growing intrusions do not exist.