The corotating variation of heliospheric quantities. I - Average features in the 20th solar cycle

Details The corotating variation of heliospheric quantities. I - Average features in the 20th solar cycle The corotating variation of heliospheric quantities. I - Average features in the 20th solar cycle

Jul 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985chjss...5..155z&link_type=abstract

Chinese Journal of Space Science, vol. 5, July 1985, p. 155-160. In Chinese, with abstract in English.

Computer Science

Corotation, Heliosphere, Periodic Variations, Solar Cycles, Solar Rotation, Coronal Holes, Solar Corpuscular Radiation, Solar Flux Density, Solar Temperature, Solar Wind Velocity

Scientific paper

The corotating variation of various heliospheric quantities at 1 AU is studied statistically for the 20th solar cycle, and the results are organized and presented as a function of the ordinal days in the Carrington rotation. The basic parameters are discussed. The average corotating variation of the heliospheric quantities shows a marked two-peak feature characterizing the two-stream structure of the longitudinal distribution of the coronal hole high-speed stream in the Carrington rotation. The various energy densities and flux densities reach their maxima in the interaction region between the high and low-speed streams. The high-speed stream always has the higher sonic velocities and pressure to kinetic energy ratios, and in particular, lower Mach numbers in comparison with the low-speed stream. On the average, the plasma beta parameter is insensitive to the variation in the coronal hole high-speed stream.

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