Computer Science
Scientific paper
Sep 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.535..563b&link_type=abstract
In: Solar variability as an input to the Earth's environment. International Solar Cycle Studies (ISCS) Symposium, 23 - 28 June 2
Computer Science
Interplanetary Magnetic Field, Coronal Mass Ejections
Scientific paper
The annual/semiannual behaviour of montly mean IMF Bz component as well as the number of hours spent by the Earth in domains of either positive or negative GSE/GSM By component were studied in the case of geoeffective (Kp>3) CMEs. The consecutive solar dipole cycles were separated, and definite differences were found between the annual variations of the mean values. When the solar dipole is opposite to the terrestrial one, the manifestation of the Russell-McPherron effect in the annual variation of mean GSM Bz is weak because there are strong inverse annual variations in the GSE system. However, the Russell-McPherron effect can be detected in the occurrence of the negative and positive By values. The case is opposite in those years when the solar and terrestrial dipoles are parallel: the Russell-McPherron effect is well detectable in the opposite annual variations of the mean GSM Bz but the occurrence of By directions shows polarity-independent semiannual variation.
Baranyi Tunde
Ludmány András
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