rigid lid approximation
272
rigid lid approximation when the deformation of the surface (for instance by
waves) has no influence on the approximation of the dynamical equations,
the ocean can be considered to be covered with a rigid lid. A criterion for
this approximation is that the length scale of motion is far less than the
Rossby deformation radius. When the rigid lid approximation is valid, the variation of potential vorticity, due to a deforming surface can be neglected.
rip current ~wave-induced currents.
ripple (1) small ridge in a ripple field formed on top of a layer of sediment
(most often sand) as the result of oscillating or flowing water; (2) a general
Ripple. (Reineck and Singh 1973). top: Asymmetrical ripples. Land towards the right.
below: Internal structure wave ripple and resulting cross-bedding
272
rigid lid approximation when the deformation of the surface (for instance by
waves) has no influence on the approximation of the dynamical equations,
the ocean can be considered to be covered with a rigid lid. A criterion for
this approximation is that the length scale of motion is far less than the
Rossby deformation radius. When the rigid lid approximation is valid, the variation of potential vorticity, due to a deforming surface can be neglected.
rip current ~wave-induced currents.
ripple (1) small ridge in a ripple field formed on top of a layer of sediment
(most often sand) as the result of oscillating or flowing water; (2) a general
Ripple. (Reineck and Singh 1973). top: Asymmetrical ripples. Land towards the right.
below: Internal structure wave ripple and resulting cross-bedding