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| Titel |
Hysteresis loops of Cosmic Ray intensity decreases versus solar and interplanetary parameters |
| VerfasserIn |
R. P. Kane |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 25, no. 9 ; Nr. 25, no. 9 (2007-10-02), S.2087-2097 |
| Datensatznummer |
250015922
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| Publikation (Nr.) |
 copernicus.org/angeo-25-2087-2007.pdf |
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| Zusammenfassung |
| The purpose of this study was to examine the correlation
between CR (Cosmic Ray) intensity and solar, interplanetary and terrestrial
parameters. The hysteresis loops of (CR) versus those of several solar
parameters showed narrow loops in even cycles 20, 22 and broad loops in odd
cycles 19, 21, as also in the recent odd cycle 23. Hysteresis plots for CR
versus interplanetary number density N and speed V were erratic and
uncertain (broad and narrow, all mixed up). Plots of CR versus
Interplanetary magnetic field (IMF) B seemed to be narrow for even as well
as odd cycles. Hysteresis loops between CR and other interplanetary
parameters were not clear-cut. The same was true for terrestrial parameters.
During sunspot maximum years 2000–2003 of cycle 23, there is a double peak
structure in all parameters. Whereas CR have a peak spacing of ~30
months, sunspots and Tilt angle have a spacing of only ~20 months. The
solar open magnetic flux and the Voyager 1 magnetic field have a spacing of
~25 months. The solar polar magnetic field reverses later than the
first peak of all parameters and hence, could not be a direct cause (as if
effect started before the cause and lasted for several months more after the cause
disappeared). It seems that CR modulation is mainly guided by magnetic
configurations deep in the heliosphere, which may not have a simple
relationship with parameters near Earth or near Sun. |
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