Abstract
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.
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Benevolenskaya, E.E., Kosovichev, A.G., Scherrer, P.H.: 2001, Astrophys. J. 554, L107.
Bromage, B.J.I., Browning, P.K., Clegg, J.R.: 2001, Space Sci. Rev. 97(1/4), 13.
Burlaga, L.F., Ness, N.F., McDonald, F.B.: 1995, J. Geophys. Res. 100(A8), 14763.
Cliver, E.W., Ling, A.G.: 2001, Astrophys. J. 556, 432.
Erdős, G., Kóta, J.: 1979, Proc. 16th ICRC 4, 45.
Fisk, L.: 1996, J. Geophys. Res. 101, 15547.
Fisk, L., Schwadron, N.A.: 2001, Space Sci. Rev. 560, 425.
Forman, M.A., Gleeson, L.J.: 1975, Astrophys. Space Sci. 32, 77.
Gosling, J.T., Pizzo, V.J.: 1999, Space Sci. Rev. 89, 21.
Gosling, J.T., Asbridge, J.R., Bame, S.J., Feldman, W.C.: 1978, J. Geophys. Res. 83, 1401.
Gosling, J.T., Bame, S.J., Feldman, W.C., McComas, D.J., Riley, P., Goldstein, B.E., Neugebauer, M.: 1997, J. Geophys. Res. 24, 309.
Hall, D.L., Duldig, M.L., Humble, J.E.: 1996, Space Sci. Rev. 78, 401.
Harvey, K.L., Recely, F.: 2002, Solar Phys. 211, 31.
Heber, B., Burger, R.A.: 1999, Space Sci. Rev. 89, 125.
Kóta, J.: 1999, Space Sci. Rev. 89, 311.
Kóta, J., Jokipii, J.R.: 1991, Geophys. Res. Lett. 18, 1797.
Kóta, J., Jokipii, J.R.: 1995, Science 268, 1024.
Kunow, H., Heber, B., Simpson, J.A.: 1998, Space Sci. Rev. 83, 215.
Lee, M.: 2001, J. Geophys. Res. 105, 10491.
Levy, M.: 1976, J. Geophys. Res. 18, 2082.
Morfill, G., Richter, A.K., Scholer, M.: 1979, J. Geophys. Res. 84, 1505.
Odstrcil, D., Pizzo, V.J.: 1999a, J. Geophys. Res. 104, 483.
Odstrcil, D., Pizzo, V.J.: 1999b, J. Geophys. Res. 104, 493.
Pizzo, V.J., Gosling, J.T.: 1994, Geophys. Res. Lett. 25, 1529.
Riley, P., Gosling, J.T., Weiss, L.A., Pizzo, V.J.: 1996, J. Geophys. Res. 101, 24349.
Rouillard, A.P.: 2007, Ph.D. thesis, Space Environment Physics Group, University of Southampton, UK.
Wang, Y.M., Sheeley, N.R.: 1990, Astrophys. J. 355, 726.
Wang, Y.M., Hawley, S.H., Sheeley, N.R.: 1996, Science 271, 464.
Wang, Y.M., Sheeley, N.R. Jr., Howard, R.A., Kraemer, J.R., Rich, N.B., Andrews, M.D., Brueckner, G.E., Dere, K.P., Koomen, M.J., Korendyke, C.M.: 1997a, Astrophys. J. 485, 875.
Wang, Y.M., Sheeley, N.R., Phillips, J.L., Goldstein, B.E.: 1997b, Astrophys. J. 488, L51.
Wang, Y.M., Sheeley, N.R., Rouillard, A.P.: 2006, Astrophys. J. 644, 638.
Wibberenz, G., Le Roux, J.A., Potgieter, M., Bieber, J.W.: 1998, Space Sci. Rev. 83, 309.
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Rouillard, A.P., Lockwood, M. The Latitudinal Effect of Corotating Interaction Regions on Galactic Cosmic Rays. Sol Phys 245, 191–206 (2007). https://doi.org/10.1007/s11207-007-9019-1
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DOI: https://doi.org/10.1007/s11207-007-9019-1