Turbulent polar heliospheric fields

Details Turbulent polar heliospheric fields Turbulent polar heliospheric fields

Apr 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17..567r&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 17, April 1990, p. 567-570.

Physics

26

Heliosphere, Interplanetary Magnetic Fields, Magnetohydrodynamic Turbulence, Solar Magnetic Field, Solar Wind, Cosmic Rays, Magnetic Variations, Solar Physics

Scientific paper

Recent observational studies of interplanetary field fluctuations and MHD simulation results are used to suggest that the turbulent evolution of the fields over the solar poles leads to a state intermediate between the large fields of the static limit and the small fields given by 'saturation' (deltaB/B = about 1). In particular, assuming the strength of the coronal hole sources of fluctuations are similar in all solar regions, the polar fluctuations in the outer heliosphere are likely to be nearly isotropic, with amplitudes somewhat smaller than those predicted by the WKB extrapolation from 1 AU in the ecliptic plane.

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