  A one-year time series of moored high-resolution temperature T-sensor data
from 1455 m depth on a 3900 m long line in about 5300 m of water in the
NE-Atlantic Canary Basin are dominated by salinity (over-)compensated
intrusions arising from the effects of Mediterranean outflow waters, which are
commonly organized as Meddies. During the passage of a Meddy-core above the
T-sensors, no intrusions were observed, thereby making it possible to use the
temperature records to quantify turbulence parameters. The present data show
that these ocean-interior turbulence estimates are from short-lived (less than
0.5 h) rather intense overturning cells with vertical scales of <5 m. Because
the turbulence inertial subrange is found to extend into the internal wave
band, the overturns are predominantly driven by shear associated with inertial
currents. Kinetic energy, current shear and temperature variance peak at
sub-inertial frequencies during the Meddy passage, suggesting wave trapping in
the warm anti-cyclonic eddy and/or weakly stratified layers. The observations
further show that internal wave displacements are coherent over vertical scales
of up to 40 m during the presence of the Meddy compared with vertical coherence
scales of less than 25 m during the more common no-Meddy conditions of double
diffusion intrusions.
