magnetospheric physics; magnetotail; solar wind-magnetosphere interactions; storms and substorms
Abstract :
[en] We examine magnetic flux closure during an extended substorm interval on 29 August 2004 involving a two-stage onset and subsequent re-intensifications. Cluster and Double Star provide observations of magnetotail dynamics, while the corresponding auroral evolution, convection response, and substorm current wedge development are monitored by IMAGE FUV, SuperDARN, and the Greenland magnetometer chain, respectively. The first stage of onset is associated with the reconnection of closed flux in the plasma sheet; this is accompanied by a short-lived auroral intensification, a modest substorm current wedge magnetic bay, but no significant ionospheric convection enhancement. The second stage follows the progression of reconnection to the open field lines of the lobes; accompanied by prolonged auroral bulge and westward-travelling surge development, enhanced magnetic bays and convection. We find that the tail dynamics are highly influenced by ongoing dayside creation of open flux, leading to flux pile-up in the near-tail and a step-wise down-tail motion of the tail reconnection site. In all, 5 dipolarizations are observed, each associated with the closure of similar to 0.1 GWb of flux. Very simple calculations indicate that the X-line should progress down-tail at a speed of 20 km s(-1) or 6 R-E between each dipolarization.
Hubert, Benoît ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Carr, C. M.
Lucek, E. A.
Bosqued, J. M.
Watermann, J. F.
Slavin, J. A.
Language :
English
Title :
Flux closure during a substorm observed by Cluster, Double Star, IMAGE FUV, SuperDARN, and Greenland magnetometers
Publication date :
2006
Journal title :
Annales Geophysicae
ISSN :
0992-7689
eISSN :
1432-0576
Publisher :
European Geosciences Union, Katlenburg-Lindau, Germany
Amm, O., Janhunen, P., Kauristie, K., Opgenoorth, H. J., Pulkkinen, T. I., and Viljanen, A.: Mesoscale ionospheric electrodynamics observed with the MIRACLE network: 1. Analysis of a pseudobreakup spiral, J. Geophys. Res., 106, 24 675-24 690, 2001.
Balogh, A., Dunlop, M. W., Cowley, S. W. H., Southwood, D. J., Thomlinson, J. G., Glassmeier, K.-H., Musmann, G., Lühr, H., Buchert, S., Acuña, M. H., Fairfield, D. H., Slavin, J. A., Riedler, W., Schwingenschuh, K., and Kivelson, M. G.: The Cluster magnetic fields investigation, Space Sci. Rev., 79, 65-91, 1997.
Balogh, A., Carr, C. M., Acuña, M. H., Dunlop, M. W., Beek, T. J., Brown, P., Fornaçon, K.-H., Georgescu, E., Glassmeier, K.-H., Harris, J., Musmann, G., Oddy, T., and Schwingenschuh, K.: The Cluster Magnetic Field Investigation: overview of in-flight performance and initial results, Ann. Geophys., 19, 1207-1217, 2001.
Bame, S. J., Ashbridge, J. R., Felthauser, H. E., Hones, E. W., and Strongly, I. B.: Characteristics of the plasma sheet in the Earth's magnetotail, J. Geophys. Res., 72, 113-129, 1967.
Baumjohann, W.: Modes of convection in the magnetotail, Phys. Plasmas, 9, 3665-3667, 2002.
Borälv, E., Opgenoorth, H. J., Kauristie, K., Lester, M., Bosqued, J. M., Dewhurst, J. P., Owen, C. J., Dunlop, M., Slavin, J. A., Fazakerley, A., and Perry, C.: Correlation between ground-based observations of substorm signatures and magnetotail dynamics, Ann. Geophys., 23, 997-1011, 2005.
Cowley, S. W. H. and Lockwood, M.: Excitation and decay of solar wind-driven flows in the magnetosphere-ionosphere system, Ann. Geophys., 10, 103-115, 1992.
Dungey, J. W.: Interplanetary magnetic fields and the auroral zones, Phys. Rev. Letters, 6, 47-48, 1961.
Escoubet, C. P., Fehringer, M., and Goldstein, M. L.: The Cluster mission - Introduction, Ann. Geophys., 19, 1197-1200, 2001.
Escoubet, C. P, Schmidt, R., Goldstein, M. L., Cluster - Science and mission overview, Space Sci. Rev., 79, 11-32, 1997.
Fairfield, D. H.: Multi-point measurements of magnetotail dynamics, Adv. Space Res., 8, 97-108, 1988.
Fairfield, D. H. and Ness, N. F.: Configuration of the geomagnetic tail during substorms, J. Geophys. Res., 75, 7032-7047, 1970.
Greenwald, R. A., Baker, K. B., Dudeney, J. R., Pinnock, M., Jones, T. B., Thomas, E. C., Villain, J.-P., Cerisier, J.-C., Senior, C., Hanuise, C., Hunsucker, R. D., Sofko, G., Koehler, J., Nielsen, E., Pellinen, R., Walker, A. D. M., Sato, N., and Yamagishi, H.,: DARN/SuperDARN: A global view of the dynamics of high-latitude convection, Space Sci. Rev., 71, 761-796, 1995.
Heppner, J. P.: Recent measurements of the magnetic field in the outer magnetosphere and boundary regions, Space Sci. Rev., 7, 166-190, 1967.
Hones Jr., E. W.: Transient phenomena in the magnetotail and their relation to substorms, Space Sci. Rev., 23, 393-410, 1979.
Lockwood, M. and Cowley, S. W. H.: Ionospheric convection and the substorm cycle, in Proceedings of the International Conference on Substorms (ICS-1), 99-109, 1992.
Lyons, L. R., Nagai, T., Blanchard, G. T., Sason, J. C., Yamamoto, T., Mukai, T., Nishida, A., and Kokubun, S.: Association between Geotail plasma flows and auroral poleward boundary intensifications observed by CANOPUS photometers, J. Geophys. Res., 104, 4485-4500, 1999.
McComas, D. J., Bame, S. J., Barker, P., Feldman, W. C., Phillips, J. L., Riley, P., and Griffee, J. W.: Solar Wind Electron Proton Alpha Monitor (SWEPAM) for the Advanced Composition Explorer, Space Sci. Rev., 86, 563-612, 1998.
McPherron, R. L. and Manka, R. H.: Dynamics of the 1054 UT, March 22, 1979 substorm, J. Geophys. Res., 90, 1175-1190, 1985.
McPherron, R. L., Russell, C. T., and Aubry, M. P.: Satellite studies of magnetospheric substorms on August 15, 1968, 9, Phenomenological model for substorms, J. Geophys. Res., 78, 3131-3149, 1973.
Mende, S. B., Heetderks, H., Frey, H. U., Lampton, M., Geller, S. P., Habraken, S., Renotte, E., Jamar, C., Rochus, P., Spann, J., Fuselier, S. A., Gerard, J.-C., Gladstone, R., Murphree, S., and Cogger, L.: Far ultraviolet imaging from the IMAGE spacecraft, 1. System design, Space Sci. Rev., 91, 243-270, 2000a.
Mende, S. B., Heetderks, H., Frey, H. U., Lampton, M., Geller, S. P., Abiad, R., Siegmund, O. H. W., Tremsin, A. S., Spann, J., Dougani, H., Fuselier, S. A., Magoncelli, A. L., Bumala, M. B., Murphree, S., and Trondsen, T.: Far ultraviolet imaging from the IMAGE spacecraft, 2. Wideband FUV imaging, Space Sci. Rev., 91, 271-285, 2000b.
Mende, S. B., Carlson, C. W., Frey, H. U., Peticolas, L. M., and Ostgaard, N.: FAST and IMAGE-FUV observations of a substorm onset, J. Geophys. Res., 108, doi:10.1029/2002JA009787, 2003.
Milan, S. E.: Dayside and nightside contributions to the cross polar cap potential: placing an upper limit on a viscous-like interaction, Ann. Geophys., 22, 3771-3777, 2004.
Milan, S. E., Cowley, S. W. H., Lester, M., Wright, D. M., Slavin, J. A., Fillingim, M., Carlson, C. W., and Singer, H. J.: Response of the magnetotail to changes in open flux content of the magnetosphere, J. Geophys. Res., 109, A04220, doi: 10.1029/2003JA010350, 2004.
Milan, S. E., Wild, J. A., Grocott, A., and Draper, N. C.: Space- and ground-based investigations of solar wind-magnetosphere-ionosphere coupling, Adv. Space. Res., in press, 2006.
Milan, S. E., Lester, M., Cowley, S.W. H., Oksavik, K., Brittnacher, M., Greenwald, R. A., Sofko, G., and Villain, J.-P.: Variations in polar cap area during two substorm cycles, Ann. Geophys., 21, 1121-1140, 2003.
Popov, V. A., Papitashvili, V. O., and Watermann, J. F.: Modelling of equivalent ionospheric currents from meridian magnetometer chain data, Earth Planets Space, 53, 129-137, 2001.
Reeves, G. D., Fritz, T. A., Cayton, T. E., and Belian, R. D.: Multisatellite measurements of the substorm injection region, Geophys. Res. Lett., 17, 2015-2018, 1990.
Reeves, G. D., Belian, R. D., and Fritz, T. A.: Numerical tracing of energetic particle drifts in a model magnetosphere, J. Geophys. Res., 96, 13997-14008, 1991.
Rème, H., Bosqued, J.-M., Sauvaud, J. A., Cros, A., Dandouras, I., Aoustin, C., Bouyssou, J., Camus, Th., Cuvilo, J., Martz, C., M'Edale, J. L., Perrier, H., Romefort, D., Rouzaud, J., d'Uston, C., Möbius, E., Crocker, K., Granoff, M., Kistler, L. M., Popecki, M., Hovestadt, D., Klecker, B., Paschmann, G., Scholer, M., Carlson, C. W., Curtis, D. W., Lin, R. P., McFadden, J. P., Formisano, V., Amata, E., Bavassano-Cattaneo, M.-B., Baldetti, P., Belluci, G., Bruno, R., Chionchio, G., Di Lellis, A., Shelley, E. G., Ghielmetti, A. G., Lennartsson, W., Korth, A., Rosenbauer, H., Lundin, R., Olsen, S., Parks, G. K., McCarthy, M., and Balsiger, H.: The Cluster Ion Spectrometry (CIS) Experiment, Space Sci. Rev., 79, 303-350, 1997.
Rème H., Aoustin, C., Bosqued, J.-M., Dandouras, I., Lavraud, B., Sauvaud, J. A., Barthe, A., Bouyssou, J., Camus, Th., Coeur-Joly, O., Cros, A., Cuvilo, J., Ducay, F., Garbarowitz, Y., Medale, J. L., Penou, E., Perrier, H., Romefort, D., Rouzaud, J., Vallat, C., Alcayde, D., Jacquey, C., Mazelle, C., d'Uston, C., Möbius, E., Kistler, L. M., Crocker, K., Granoff, M., Mouikis, C., Popecki, M., Vosbury, M., Klecker, B., Hovestadt, D., Kucharek, H., Kuenneth, E., Paschmann, G., Scholer, M., Sckopke, N., Seidenschwang, E., Carlson, C. W., Curtis, D. W., Ingraham, C., Lin, R. P.,McFadden, J. P., Parks, G. K., Phan, T., Formisano, V., Amata, E., Bavassano-Cattaneo, M. B., Baldetti, P., Bruno, R., Chionchio, G., Di Lellis, A., Marcucci, M. F., Pallocchia, G., Korth, A., Daly, P. W., Graeve, B., Rosenbauer, H., Vasyliunas, V., Mc-Carthy, M.,Wilber, M., Eliasson, L., Lundin, R., Olsen, S., Shelley, E. G., Fuselier, S., Ghielmetti, A. G., Lennartsson, W., Escoubet, C. P., Balsiger, H., Friedel, R., Cao, J.-B., Kovrazhkin, R. A., Papamastorakis, I., Pellat, R., Scudder, J., and Sonnerup, B.: First multispacecraft ion measurements in and near the Earth's magnetosphere with the identical Cluster ion spectrometry (CIS) experiment, Ann. Geophys., 19, 1303-1354, 2001.
Ruohoniemi, J. M. and Baker, K. B.: Large-scale imaging of high-latitude convection with Super Dual Auroral Radar Network HF radar observations, J. Geophys. Res., 103, 20 797-20 811, 1998.
Slavin, J. A., Fairfield, D. H., Lepping, R. P., Hesse, M., Ieda, A., Tanskanen, E., Østgaard, N., Mukai, T., Nagai, T., Singer, H. J., and Sutcliffe, P. R.: Simultaneous observations of earthward flow bursts and plasmoid ejection during magnetospheric substorms, J. Geophys. Res., 107, doi:10.1029/2000JA003501, 2002.
Slavin, J. A., Owen, C. J., Dunlop, M. W., Borälv, E., Moldwin, M. B., Sibeck, D. G., Tanskanen, E., Goldstein, M. L., Fazakerley, A., Balogh, A., Lucek, E., Richter, I., Rème, H., and Bosqued, J. M.: Cluster four spacecraft measurements of small travelling compression regions in the near-tail, Geophys. Res. Lett., 30, doi:10.1029/2003GL018438, 2003.
Slavin, J. A., Tanskanen, E. I., Hesse, M., Owen, C. J., Dunlop, M. W., Imber, S., Lucek, E. A., Balogh, A., and Glassmeier, K.-H.: Cluster observations of traveling compression regions in the near-tail, J. Geophys. Res., 110, doi:10.1029/2004JA010878, 2005.
Smith, C. W., Acuña, M. H., Burlaga, L. F., L'Heureux, J., Ness, N. F., and Scheifele, J.: The ACE Magnetic Fields Experiment, Space Sci. Rev., 86, 613-632, 1998.
Stone, E. C., Frandsen, A. M., Mewaldt, R. A., Christian, E. R., Marglies, D., Ormes, J. F., and Snow, F.: The Advanced Composition Explorer, Space Sci. Rev., 86, 1-22, 1998.
Tsyganenko, N. A. and Stern, D. P., Modelling the global magnetic field of the large-scale Birkeland current systems, J. Geophys. Res., 101, 27 187-27 198, 1996.