  The two-point correlation function of the energy dissipation, obtained from a
one-point time record of an atmospheric boundary layer, reveals a rigorous
power-law scaling with intermittency exponent mu=0.20 over almost the entire
inertial range of scales. However, for the related integral moment, the
power-law scaling is restricted to the upper part of the inertial range only.
This observation is explained in terms of the operational surrogacy of the
construction of energy dissipation, which influences the behaviour of the
correlation function for small separation distances.
