Solar cycle changes in coronal holes and space weather cycles

Details Solar cycle changes in coronal holes and space weather cycles Solar cycle changes in coronal holes and space weather cycles

Aug 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002jgra..107.1154l&link_type=abstract

Journal of Geophysical Research (Space Physics), Volume 107, Issue A8, pp. SMP 3-1, CiteID 1154, DOI 10.1029/2001JA007550

Physics

40

Interplanetary Physics: Sources Of The Solar Wind, Interplanetary Physics: Solar Wind Plasma, Interplanetary Physics: Solar Cycle Variations (7536)

Scientific paper

Potential field source surface models of the coronal magnetic field, based on Mt. Wilson Observatory synoptic magnetograms, are used to infer the coronal hole sources of low-heliolatitude solar wind over approximately the last three solar cycles. Related key parameters like interplanetary magnetic field and bulk velocity are also calculated. The results illustrate how the evolving contribution of the polar hole sources relative to that from low-latitude and midlatitude active region hole sources can explain solar magnetic field control of long-term interplanetary variations. In particular, the enduring consistent magnetogram record and continuous model displays produce a useful overview of the solar control of interplanetary cycles and trends that affect space weather.

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