Stationary topographic internal gravity wave
= Stationary topographic internal gravity wave
{title2=$\omega=0,\quad\widehat\omega=-kU$}
= Topographic internal gravity wave
{synonym}
A fixed terrain obstacle forces a zero laboratory-frequency <internal gravity wave> through the <kinematic boundary condition> $w=U h_x$. Its <intrinsic frequency> is $-kU$. Propagation, radiation and the transient arrival of its permanent component are distinct questions.