ULYSSES observations of intermittent heliospheric turbulence

Abstract

Structure function measurements of small scale magnetic field fluctuations in high speed streams emanating from the Sun's polar coronal holes are well described by a multifractal model of intermittent turbulence. We discuss structure functions and present measurements of intermittency through the transition regime - encompassing scales between waves and inertial range turbulence - and demonstrate that fluctuations in this regime are probably not more or less intermittent than those in the inertial range. The observations are in good agreement with a recently published model of evolving intermittent turbulence.