5.2.1.4 Two rigid lid methods in MOM

Since the method of Huang (1993) has not been implemented, in this manual the rigid lid will imply the two assumptions $\eta =0$ and w(z=0) = 0. In MOM, there are two methods which employ the rigid lid approximation. The first is the original Bryan (1969) streamfunction method (option stream_function). The second method is that from Smith, Dukowicz, and Malone (1992) and Dukowicz, Smith, and Malone (1993). Instead of solving for a streamfunction, they solved for the surface pressure. Hence, the option is called  rigid_lid_surface_pressure (Section 6.8). Both of these rigid lid methods have been unchanged since MOM 2.