The global nature of solar cycle variations of the solar wind dynamic pressure

Details The global nature of solar cycle variations of the solar wind dynamic pressure The global nature of solar cycle variations of the solar wind dynamic pressure

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26..561r&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 5, p. 561-564

Astronomy and Astrophysics

Astrophysics

10

Interplanetary Physics: Solar Cycle Variations, Interplanetary Physics: Interplanetary Magnetic Fields, Interplanetary Physics: Cosmic Rays, Solar Physics, Astrophysics, And Astronomy: Magnetic Fields

Scientific paper

The solar wind dynamic pressure measured near the ecliptic varies over the solar cycle. A major unanswered question has been whether this variation is a global feature or restricted to low latitudes and thus perhaps a consequence of the changing heliospheric current sheet configuration. We use plasma data from IMP-8, Ulysses and Voyager 2 to show that the large-scale variation of the solar wind dynamic pressure is the same at all latitudes. Thus the solar wind source varies globally over the solar cycle, with important implications for the source mechanism and motions of the heliospheric boundaries.

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