Evolution of the solar wind structure over a solar cycle - Interplanetary scintillation velocity measurements compared with coronal observations

Details Evolution of the solar wind structure over a solar cycle - Interplanetary scintillation velocity measurements compared with coronal observations Evolution of the solar wind structure over a solar cycle - Interplanetary scintillation velocity measurements compared with coronal observations

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.1717r&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, Feb. 1, 1991, p. 1717-1736.

Physics

91

Interplanetary Medium, Scintillation, Solar Cycles, Solar Wind, Solar Activity Effects, Solar Corona, Solar Magnetic Field, Velocity Measurement

Scientific paper

Sixteen years of solar wind observations via the technique of interplanetary scintillation (IPS) are presented. By an ecliptic comparison with in situ spacecraft observations, these data are shown to be valuable estimates of the large-scale slowly evolving structures in the solar wind speed, but to underestimate the speed in small-scale or rapidly evolving structures. These IPS observations allow the large structures to be studied over solar latitudes from 60 deg N to 60 deg S over more than a solar cycle. The observations are compared with plots of coronal density estimated from coronameter observations and radial magnetic field estimated from solar magnetograph observations and the potential field method. The results confirm the controlling influence of the coronal magnetic field in determining the three-dimensional structure of the solar wind.

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