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The latitudinal effect of corotating interaction regions on galactic cosmic rays

Rouillard, A. P. and Lockwood, M. (2007) The latitudinal effect of corotating interaction regions on galactic cosmic rays. Solar Physics, 245 (1). pp. 191-206. ISSN 0038-0938

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To link to this article DOI: 10.1007/s11207-007-9019-1

Abstract/Summary

The response of galactic cosmic rays (GCRs) to an isolated enhancement of the non-axisymmetric component of the solar open magnetic field between June and November 1996 is investigated by using a combination of solar observations and numerical modelling of the interplanetary medium. The most obvious coronal hole visible from Earth at the time had little shielding effect on the flux of GCRs, as measured at Earth by neutron monitors. It is found that the evolution of the corotating interaction regions generated by a less obvious coronal hole was the principal controlling factor. Moreover, we demonstrate the imprint of the latitudinal and longitudinal evolution of that coronal hole on the variation of GCRs. The latitudinal extent of this solar minimum corotating interaction region had a determining, but local, shielding effect on GCRs, confirming previous modelling results.

Item Type:Article
Refereed:Yes
Divisions:No Reading authors. Back catalogue items
Faculty of Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:38540
Publisher:Springer Verlag

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