Axisymmetric vertical mode of a shearing sheet
= Axisymmetric vertical mode of a shearing sheet
{title2=$e^{st+ikz}$}
= Axisymmetric vertical modes of a shearing sheet
{synonym}
A horizontal-velocity perturbation depending only on height has zero vertical velocity for nonzero <wavenumber> under <incompressibility>. Its <pressure> amplitude then vanishes in the unstratified vertical momentum equation.