Scarce bibliography on the subject

COX (79): (primitive equations) in his simulation of the Somali current, introduced a steplike wall at 45^o along the western boundary. He made a study by rotating the basin 45^o north and so making the steplike wall straight. His conclusion: no significant effect (a few changes).
Notes: High viscosity (1000 m²/s), , NO-SLIP at the walls.

HAIDVOGEL (92): (QG model) straight wall. FREE-SLIP versus NO-SLIP. NO-SLIP yields a different circulation. Namely, the jet in the double gyre problem is not as strong. There is an early separation of the jet from the coast.

DENGG (92), (QG model) rectangular continent in NW part of the basin. FREE-SLIP yields an unrealistic jet attached to the boundary, for whatever value of the wind forcing.

VERRON and BLAYO (95) (QG model) FREE-SLIP yields an unrealistic residual circulation if one of the gyre is shut down (double gyre problem).

ADCROFT and MARSHALL (98) (shallow water equations). rotation of a square basin: the straight coastline is no more represented by a straight model coastline but by a steplike wall.
Under such rotation, they observed different behaviors.

• NO-SLIP is robust under rotation (angle >45^o for change).
• FREE-SLIP is very sensitive. A few degree is enough.
• They argue that a change of the stress tensor weakens sensitivity of FREE-SLIP.