This is the plot we showed earlier, but with Ri next to the time-depth transects. Ri at the pycnocline near 120 m is less than 1, and so we think mixing might be possible.
	Once we have a Ri, we can estimate diffusivities and then heat fluxes, using parameterizations such as Pacanowski and Philander.  We find that the region of low Ri produces an upward heat flux of 25 W m-2.