  Internal waves propagate on the ocean stratification and carry energy and
momentum through the ocean interior. The two most significant sources of these
waves in the ocean are surface winds and oscillatory tidal flow across
topography. We propose a hybrid of these two mechanisms, in which wind induced
oscillations of sea surface and isopycnal heights are rapidly communicated to
the seafloor via hydrostatic pressure. In the presence of topography, the
resulting oscillatory bottom velocity may then generate internal waves in a
similar manner to the barotropic tide. We investigate this mechanism in an
idealised numerical isopycnal model of a storm passing over a mid ocean ridge,
and perform several perturbation experiments in which ocean and wind properties
are varied. Bottom-generated internal waves are identified propagating away
from the ridge in the wake of the storm. Estimates of the total wave energy
suggest that in the right circumstances these waves could be a significant
source of internal wave energy, with a local wind work to wave energy
conversion rate of up to 50% of the corresponding conversion to surface
generated near-inertial waves in our domain. Our results suggest a need for
further investigation in less idealised scenarios to more precisely quantity
this novel mechanism of deep ocean wave generation, and how it may affect
abyssal mixing.
