Sverdrup wave

A Sverdrup wave (also known as Poincaré wave, or rotational gravity wave ^[1]) is a wave in the ocean, or large lakes, which is affected by gravity and Earth's rotation (see Coriolis effect).

For a non-rotating fluid, shallow water waves are affected only by gravity (see Gravity wave), where the phase velocity of shallow water gravity wave (c) can be noted as

${\displaystyle c=(gH)^{1/2}}$

and the group velocity (c_g) of shallow water gravity wave can be noted as

${\displaystyle c_{\mathrm {g} }=(gH)^{1/2}}$ i.e. ${\displaystyle c=c_{\mathrm {g} }}$

where g is gravity, λ is the wavelength and H is the total depth.