Radial evolution of cross helicity in high-latitude solar wind
Bavassano, B.; Matthaeus, W. H.; Bieber, J. W.; Parhi, S.; Oughton, S.; Breech, B.; Minnie, J.
United States, South Africa, New Zealand, Italy
Abstract
We employ a turbulence transport theory to explain the high-latitude radial evolution of cross helicity, or Alfvénicity, observed by the Ulysses spacecraft. Evolution is slower than at low latitudes due to weakened shear driving.