qThe
structures of the normal modes can be obtained by solving this equation (from previous slide):
q
q
q
q
q
qOr,
we can use the concept of the one-layer shallow water model, where the phase
speed (c) of the gravity
wave is related to the depth of the shallow water (H):
q
q
q Using this concept,
we can assume each of the normal mode behaves like the one-layer shallow water with a “equivalent depth” of He:
q