Скачать или смотреть Shelf Induce topographic waves

The shallow water equations are set up with a forced flow that is mostly along isobaths. A small increase in the shelf slope is added at the center of the domain which drives the production of potential vorticity. For a short time, a linear topographic mode is arrested by the mean flow and is gains amplitude through resonant interaction with topography. This video shows the free surface anomaly (referenced to the free surface associated with the prescribed flow).

When nonlinearities take over, a low pressure signal begins to travel faster than the mean flow, and is shown travelling to the left. A standing wave is seen on the downstream side of the convergence zone.