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Severe Geomagnetic Storms and Forbush Decreases: Interplanetary Relationships Reexamined : Volume 28, Issue 2 (09/02/2010)

By Kane, R. P.

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Book Id: WPLBN0003972826
Format Type: PDF Article :
File Size: Pages 11
Reproduction Date: 2015

Title: Severe Geomagnetic Storms and Forbush Decreases: Interplanetary Relationships Reexamined : Volume 28, Issue 2 (09/02/2010)  
Author: Kane, R. P.
Volume: Vol. 28, Issue 2
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2010
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Kane, R. P. (2010). Severe Geomagnetic Storms and Forbush Decreases: Interplanetary Relationships Reexamined : Volume 28, Issue 2 (09/02/2010). Retrieved from http://www.worldlibrary.net/


Description
Description: Instituto Nacional de Pesquisas Espaciais, C.P. 515, 12245-970 – São José dos Campos, SP, Brazil. Severe storms (Dst) and Forbush decreases (FD) during cycle 23 showed that maximum negative Dst magnitudes usually occurred almost simultaneously with the maximum negative values of the Bz component of interplanetary magnetic field B, but the maximum magnitudes of negative Dst and Bz were poorly correlated (+0.28). A parameter Bz(CP) was calculated (cumulative partial Bz) as sum of the hourly negative values of Bz from the time of start to the maximum negative value. The correlation of negative Dst maximum with Bz(CP) was higher (+0.59) as compared to that of Dst with Bz alone (+0.28). When the product of Bz with the solar wind speed V (at the hour of negative Bz maximum) was considered, the correlation of negative Dst maximum with VBz was +0.59 and with VBz(CP), 0.71. Thus, including V improved the correlations. However, ground-based Dst values have a considerable contribution from magnetopause currents (several tens of nT, even exceeding 100 nT in very severe storms). When their contribution is subtracted from Dst(nT), the residue Dst* representing true ring current effect is much better correlated with Bz and Bz(CP), but not with VBz or VBz(CP), indicating that these are unimportant parameters and the effect of V is seen only through the solar wind ram pressure causing magnetopause currents. Maximum negative Dst (or Dst*) did not occur at the same hour as maximum FD. The time evolutions of Dst and FD were very different. The correlations were almost zero. Basically, negative Dst (or Dst*) and FDs are uncorrelated, indicating altogether different mechanism.

Summary
Severe geomagnetic storms and Forbush decreases: interplanetary relationships reexamined

Excerpt
Barnden, L. R.: The Large-Scale Magnetic Field Configuration Associated With Forbush Decreases, Proc. 13th Int. Cosmic Ray Conf., 2, 1277, 1973.; Belov, A. V. and Ivanov, K. G.: Forbush-Effects in 1977–1979, Proc. 25th Int. Cosmic Ray Conf., Durban, 1, 421, 1997.; Belov, A. V., Eroshenko, E. A., Oleneva, V. A., Struminsky, A. B., and Yanke, V. G.: What determines the magnitude of Forbush decreases?, Adv. Space Res., 27(3), 625–630, 2001.; Belov, A., Baisultanova, L., Eroshenko, E., Mavromichalaki, H., Yanke, V., Pchelkin, V., Plainaki, C., and Mariatos, G.: Magnetospheric effects in cosmic rays during the unique magnetic storm on November 2003, J. Geophys. Res., 110, A09S20, doi:10.1029/2005JA011067, 2005.; Burlaga, L. F., McDonald, F. B., Ness, N. F., Schwenn, R., Lazarus, A. J., and Mariani, F.: Interplanetary flow systems associated with cosmic ray modulation in 1977–1980, J. Geophys. Res., 89, 6579–6587, 1984.; Cane, H. V.: Cosmic Ray Decreases and Magnetic Clouds, J. Geophys. Res., 98, 3509–3512, 1993.; Cane, H. V.: Coronal mass ejections and Forbush decreases, Space Sci. Rev., 93, 55–77, 2000.; Cane, H. V., Richardson, I. G., and Wibberenz, G.: The Response of Energetic Particles to the Presence of Ejecta Material, Proc. 24th Int. Cosmic Ray Conf., 4, 377, 1995.; Cane, H. V., Richardson, I. G., and von Rosenvinge, T. T.: Cosmic ray decreases: 1964–1994, J. Geophys. Res., 101, 21561–21572, 1996.; Dungey, J. W.: Interplanetary magnetic field and the auroral zones, Phys. Rev. Lett., 6, 47–48, 1961.; Forbush, S. E.: On the Effects in the Cosmic-Ray Intensity Observed During the Recent Magnetic Storm, Phys. Rev., 51, 1108–1109, 1937.; Gonzalez, W. D. and Echer, E.: A study on the peak Dst and peak negative $B_z$ relationship during intense geomagnetic storms, Geophys. Res. Lett., 32, L18103. doi:10.1029/2005GL023486, 2005.; Gonzalez, W. D., Joselyn, J. A., Kamide, Y., Kroehl, H. W., Rostoker, G., Tsurutani, B. T., and Vasyliunas, V.: What is a geomagnetic storm?, J. Geophys. Res., 99, 5771–5792, 1994.; Hess, V. F. and Demmelmair, A.: World-wide Effect in Cosmic Ray Intensity. as Observed During a Recent Geomagnetic Storm, Nature, 140, 316–317, 1937.; Iucci, N., Parisi, M., Storini, M., and Villoresi, G.: Forbush Decreases: Origin and Development in the Interplanetary Space, Nuovo Cimento, 2C, 1–52, 1979a.; Iucci, N., Parisi, M., Storini, M., and Villoresi, G.: High Speed Solar Wind Streams and Galactic Cosmic Ray Modulation, Nuovo Cimento, 2C, 421–438, 1979b.; Iucci, N., Pinter, S., Parisi, M., Storini, M., and Villoresi, G.: The Longitudinal Asymmetry of the Interplanetary Perturbation Producing Forbush Decreases, Nuovo Cimento, 9C, 39–50, 1986.; Kane, R. P.: A comparative study of geomagnetic, interplanetary, and cosmic ray storms, J. Geophys. Res., 82, 561–577, 1977.; Kane, R. P.: How good is the relationship of solar and interplanetary plasma parameters with geomagnetic storms?, J. Geophys. Res., 110, A02213, doi:10.1029/2004JA010799, 2005.; Kudela, K. and Brenkus, R.: Cosmic ray decreases and geomagnetic activity: list of events 1982–2002, J. Atmos. Solar-Terr. Phys., 66, 1121–1126, 2004.; Lockwood, J. A.: Forbush Decreases in the Cosmic Radiation, Space Sci. Revs., 12, 658–715, 1971.; Morfill, G. E. and Scholer, M.: Influence of interplanetary shocks on solar particle events, Astrophys. Space Sci., 46, 73–86, 1977.; Nagashima, K., Sakakibara, S., Fujimoto, K., Tatsuoka, R., and Morishita, I.: Localized Pits and Peaks in Forbush Decrease, Associated with Stratified Structure of Disturbed and Undisturbed Magnetic Fields, Nuov. Cimento, 13C, 551–587, 1990.; Papaioannou, A., Belov, A., Mavromichalaki, H., Eroshenko, E. and Oleneva, E. V.: The rare exclusion of the July 2005 cosmic ray variations resulted from western and behind the limb solar activity, Adv. Space Res., 43, 582–588, 2009.; Papaioannou, A., Mavromichalaki, H., Eroshenko, E., Belov, A., and Oleneva, V.: The burst of solar and geomagnetic activity in August–

 

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