  The inertial subrange of turbulence in a density stratified environment is
the transition from internal waves to isotropic turbulence, but it is unclear
how to interpret its extension to anisotropic stratified turbulence. Knowledge
about stratified turbulence is relevant for the dispersal of suspended matter
in geophysical flows, such as in most of the ocean. For studying
internal-wave-induced ocean-turbulence moored high-resolution temperature
(T-)sensors are used. Spectra from observations on episodic quasi-convective
internal wave breaking above a steep slope of large seamount Josephine in the
Northeast-Atlantic demonstrate an inertial subrange that can be separated in
two parts: A large-scale part with relatively coherent portions adjacent to
less coherent portions, and a small-scale part that is smoothly continuous (to
within standard error). The separation is close to the Ozmidov frequency, and
coincides with the transition from anisotropic/quasi-deterministic stratified
turbulence to isotropic/stochastic inertial convective motions as inferred from
a comparison of vertical and horizontal co-spectra. These observations contrast
with T-sensor observations of shear-dominated internal wave breaking in an
equally turbulent environment above the slope of a small Mid-Atlantic
ridge-crest, which demonstrate a stochastic inertial subrange throughout.
