Physics
Scientific paper
Feb 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997jgr...102.2137z&link_type=abstract
Journal of Geophysical Research, Volume 102, Issue A2, p. 2137-2146
Physics
4
Interplanetary Physics: Energetic Particles, Heliospheric, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions
Scientific paper
Two periods of fast (covering one or two solar rotations) global variations of solar magnetic fields have been found to exist in each 11-year cycle of solar activity. Solar activity that is determined from commonly employed indices (Wolf numbers, radio flux, etc.) changes little during these periods. These periods are characterized by both an enhancement of flaring activity, which accounts for the fast changes in current, and, accordingly, magnetic structures. One occurs during the rising phase of solar activity and is accompanied by an enhancement of large-scale magnetic fields and fast changes in global magnetic structure of the corona. In this case, ``favorable conditions'' are created for an effective acceleration of high-energy solar cosmic rays. The other occurs during the declining phase of solar activity and is characterized by a structural simplification of large-scale magnetic fields and largely by the attenuation of magnetic fields in the corona. The observed significant increase in solar wind mass flux, an enhancement of the interplanetary magnetic field, and anomalously strong geomagnetic disturbances are heliospheric manifestations of transient phenomena and processes in the solar corona associated with the dynamics of large-scale magnetic fields. This period is most conspicuous in long-term cosmic ray intensity variations, which are analogous to a Forbush decrease. These findings are explained by the commencement and cessation of an active interaction between magnetic fields of the ``old'' cycle and emerging fields of the ``new'' cycle, which trigger transient, flare-related, coronal processes.
Kovalenko Vladimir A.
Molodykh Sergey I.
Zherebtsov G. A.
No associations
LandOfFree
Heliospheric characteristics during fast global variations of solar magnetic fields does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Heliospheric characteristics during fast global variations of solar magnetic fields, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heliospheric characteristics during fast global variations of solar magnetic fields will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1604799