Using large-eddy simulations (LES) it is shown that the depth of a diurnal thermocline h should be scaled by the Zilitinkevich scale LZ, not by the Monin-Obukhov length scale LMO, contrary to the proposition by Pearson et al. Their argument to explain the slower increase of h than LMO using the effect of the preexisting thermocline is also invalid.
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Acknowledgments. This work was supported by the National Research Foundation of Korea grant funded by the Korean government (MEST Grant NRF-2009-C1AAA001-0093068).
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