They then estimated the heat flux into the thermocline using a standard (accepted) model, with a thermocline
eddy diffusion coefficient of 1.2E - 5 m ^ 2 / s
from Ledwell: We estimate s by using this slope along with k = 1.2x10 - 5 m2 / s (the
eddy diffusion coefficient in the thermocline [Ledwell et al., 1998]-RRB- So if they are wrong, either their basic model is wrong (which seems unlikely - it is just a simple energy balance model after all), or their choice of
eddy diffusion coefficient is wrong.