Research Fields

Space physics
Research Project

New developments of multi-sphere and multi-energy simulation of magnetic storms
Research Keywords

Solar-Terrestrial Physics, Magnetic Storms, Simulation
Research Interests

Selected Publications

1.         Ohtani, S., Y. Ebihara, and H. J. Singer (2007), Storm-time magnetic configurations at geosynchronous orbit: Comparison between the main and recovery phases, J. Geophys. Res., 112, A05202, doi:10.1029/2006JA011959.

2.         Ebihara, Y., Y.-M. Tanaka, S. Takasaki, A. T. Weatherwax, and M. Taguchi (2007), Quasi-stationary auroral patches observed at the South Pole Station, J. Geophys. Res., 112, A01201, doi:10.1029/2006JA012087.

3.         Ebihara, Y., M. Yamada, S. Watanabe and M. Ejiri, "Fate of outflowing suprathermal oxygen ions that originate in the polar ionosphere", Journal of Geophysical Research, 111, A04219, doi:10.1029/2005JA011403, 2006.

4.         Maynard, N. C., W. J. Burke, Y. Ebihara, D. M. Ober, G. R. Wilson, K. D. Siebert, J. D. Winningham, L. J. Lanzerotti, C. J. Farrugia, M. Ejiri, H. Reme, A. Balogh, and A. Fazakerley, "Characteristics of merging at the magnetopause inferred from dayside 557.7-nm all-aky images: IMF drivers of poleward moving auroral forms,"  Annales Geophysicae, 24, 3071-3098, 2006.

5.         Yamauchi, M., P. C. Brandt, Y. Ebihara, I. Dandouras, H. Nilsson, R. Lundin, H. Réme, C. Vallat, P.-A. Lindquvist, A. Balogh, and P.W. Daly, "Source location of the wedge-like dispersed ring current in the morning sector during a substorm", Journal of Geophysical Research, 111, A11S09, doi:10.1029/2006JA011621, 2006.

6.         Shiokawa, K., K. Seki, Y. Miyoshi, A. Ieda, T. Ono, M. Iizima, T. Nagatsuma, T. Obara, T. Takashima, K. Asamura, Y. Kasaba, A. Matsuoka, Y. Saito, H. Saito, M. Hirahara, Y. Tonegawa, F. Toyama, M. Tanaka, M. Nose, Y. Kasahara, K. Yumoto, H. Kawano, A. Yoshikawa, Y. Ebihara, A. Yukimatsu, N. Sato, S. Watanabe, and the Inner Magnetosphere Subgroup in the Society of Geomagnetism and Earth, Planetary and Space Sciences, ERG -  A small-satellite mission to investigate the dynamics of the inner magnetosphere, Advances in Space Research, 38(8), 1861-1869, 2006.

7.         Izutsu, N., I. Iijima, T. Kawasaki, Y. Matsuzaka, M. Namiki, S. Ohta, Y. Saito, M. Toriumi, T. Yamagami, Y. Ebihara, M. Ejiri, A. Kadokura, N. Sato, H. Yamagishi, Y. Katayose, Y. Tomida, M. Fujii, K. Kasahara, H. Murakami, Y. Kondo, and S. Uchiyama, "Japanese polar patrol balloon experiments from 2002 and 2004", Advances in Space Research., Vol. 37, 2043-2051, 2006.

8.         Ebihara, Y., M.-C. Fok, S. Sazykin, M. F. Thomsen, M. R. Hairston, D. S. Evans, F. J. Rich, and M. Ejiri, "Ring current and the magnetosphere-ionosphere coupling during the super storm of 20 November 2003," Journal of Geophysical Research, 110, A09S22, doi:10.1029/2004JA010924, 2005.

9.         Ebihara, Y., M.-C. Fok, R.A. Wolf, M.F. Thomsen, and T.E.Moore, "Nonlinear impact of the plasma sheet density on the ring current," Journal of Geophysical Research, 110, A02208, doi:10.1029/2004JA010435, 2005.

10.     Nilsson, H., T. I. Sergienko, Y. Ebihara, M. Yamauchi "Quiet-time mid-latitude trough: influence of convection, field-aligned currents and proton precipitation", Annales Geophysicae, Vol. 23, 327-3288, 2005.

11.     Figueiredo, S., G. T. Marklund, T. Karlsson, T. Johansson, Y. Ebihara, M. Ejiri, N. Ivchenko, P.-A. Lindqvist, H. Nilsson, A. Fazakerley, "Temporal and spatial evolution of discrete auroral arcs as seen by Cluster", Annales Geophysicae, Vol. 23, 2531-2557, 2005.

12.     Kataoka, R., D. H. Fairfield, D. G. Sibeck, L. Rasttter, M.-C. Fok, T. Nagatsuma, and Y. Ebihara, "Magnetosheath variations during the storm main phase on November 20, 2003: Evidence for solar wind density control of energy transfer to the magnetosphere", Geophysical Research Letters, Vol. 32, L21108, doi:10.1029/2005GL024495, 2005.

13.     Sato, N., A. Kadokura, Y. Ebihara, H. Deguchi, and T. Saemundsson, "Tracing geomagnetic conjugate points using exceptionally similar synchronous auroras", Geophysical Research Letters, Vol. 32, No. 17, L17109, 10.1029/2005GL023710, 2005.

14.     Fok, M.-C., Y. Ebihara and T. E. Moore, "Inner Magnetospheric Plasma Interactions and Coupling with the Ionosphere", Advances in Polar Upper Atmosphere Research, No. 19, 106-134, 2005.

15.     Fok, M. -C., Y. Ebihara, T. E. Moore, D. M. Ober and K. A. Keller, "Geospace storm processes coupling the ring current, radiation belt and plasmasphere", Inner Magnetosphere Interactions: New Perspectives from Imaging, Geophysical Monograph Series 159, 207-220, AGU, 2005.

16.     Ebihara, Y., and M.-C. Fok, "Postmidnight storm-time enhancements of tens-of-keV proton flux," Journal of Geophysical Research, 109, A12209, doi:10.1029/2004JA010523, 2004.

17.     Ebihara, Y., M.-C. Fok, R.A. Wolf, T.J. Immel, and T.E. Moore, "Influence of ionosphere conductivity on the ring current," Journal of Geophysical Research, Vol. 109, A08205, doi:10.1029/2003JA010351, 2004.

18.     Ebihara, Y., M. Ejiri, I. Sandahl, H. Nilsson, M. Grande, J. F. Fennell, J. L. Roeder, N. Yu. Ganushkina, and A. Milillo, "Structure and dynamics on the proton energy density in the inner magnetosphere", Advances in Space Research, Vol. 33, Issue 5, 711-718, 2004.

19.     Ebihara, Y., M. Ejiri, H. Nilsson, I. Sandahl, M. Grande, J. F. Fennel, J. L. Roeder, D. R. Weimer, and T. A. Fritz, "Multiple discrete-energy ion features in the inner magnetosphere: Event on February 9, 1998", Annales Geophysicae, Vol. 22, Issue 4, 1297-1304, 2004.

20.     Ganushkina, N. Y., J. Korhonen, T. I. Pulkkinen, Y. Ebihara, M. Ejiri and T. A. Fritz, "Evolution of the ring current energy during May 2-4, 1998 magnetic storm", Advances in Polar Upper Atmosphere Research, No.18, 111-119, 2004.

21.     Nakamura, T., Y. Ebihara, M. Ejiri, A. Kadokura, N. Matsumoto, Y. Matsuzaka, K. Mukai, H. Murakami, M. Nakagawa, M. Namiki, N. Oshima, Y. Saito, N. Sato, H. Suzuki, W. Takahashi, M. Uchida, T. Yamagami, H. Yamagishi, M. Yamamoto, and M. Yamauchi, "Observations of hard X-rays of auroral origin with Polar Patrol Balloons, No. 8 and 10, Advances in Polar Upper Atmosphere Research, No.18, 10-22, 2004.

22.     Sato, N., D. M. Wright, C. W. Carlson, Y. Ebihara, M. Sato, T. Saemundsson, S. E. Milan, and M. Lester, " Generation region of pulsating aurora obtained simultaneously by the FAST satellite and a Syowa-Iceland conjugate pair of observatories," Journal of Geophysical Research, Vol. 109, A10201, doi:10.1029/2004JA010419, 2004.

23.     Ebihara, Y., M. Ejiri, and H. Nilsson, "Single particle simulation on the storm-time ring current formation and Dst variation", Advances in Space Research, Vol. 31, Issue 4, 1051-1058, 2003.

24.     Ebihara, Y. and M. Ejiri, "Numerical simulation of the ring current: Review", Space Science Reviews, Vol.105(1-2), 377-452, 2003.

25.     Ganushkina, N. Yu, T. Karhunen, M. V. Kubyshkina, Y. Ebihara, V. A. Sergeev, T. I. Pulkkinen and T. A. Fritz, "Locations of proton isotropic boundaries as measured by conjugate high-altitude and low-altitude satellites", Advances in Space Research, Vol.31, Issue 5, 1265, 2003.

26.     Milillo, A, S. Orsini, D.C. Delcourt, A. Mura, S. Massetti, E. DeAngelis, and Y. Ebihara, "Empirical model of proton fluxes in the equatorial inner magnetosphere: 2. Properties and applications", Journal of Geophysical Research, Vol.108, No.A5, 1165, doi:10.1029/2002JA009581, 2003.

27.     Ebihara, Y., M. Ejiri, H. Nilsson, I. Sandahl, A. Milillo, M. Grande, J.F.Fennell, and J.L.Roeder, "Statistical distribution of the storm-time proton ring current: POLAR measurements", Geophysical Research Letters, Vol.29, No.20, 1969, doi:10.1029/2002GL015430, 2002.

28.     Sato, N., D. M. Wright, Y. Ebihara, M. Sato, Y. Murata, H. Doi, T. Saemundsson, S. E. Milan, M. Lester, and C. W. Carlson, Direct comparison of pulsating aurora observed simultaneously by the FAST satellite and from the ground at Syowa, Geophysical Research Letters, Vol. 29, No. 21, 2041, doi:10.1029/2002GL015615, 2002.

29.     Hashimoto, K. K., T. Kikuchi, and Y. Ebihara, Response of the magnetospheric convection to sudden interplanetary magnetic field changes as deduced from the evolution of partial ring currents, Journal of Geophysical Research, Vol. 107, No. A11, 1337, doi:10.1029/2001JA009228, 2002.

30.     Brandt, P. C:son, D. G. Mitchell, Y. Ebihara, B. R. Sandel, E. C. Roelof, J. L. Burch, and R. Demajistre, Global IMAGE/HENA observations of the ring current: Examples of rapid response to IMF and ring current-plasmasphere interaction, Journal of Geophysical Research, Vol. 107, No. A11, 1359, doi:10.1029/2001JA000084, 2002.

31.     C:son Brandt, P., Y. Ebihara, S. Barabash, and E. C. Roelof, Energetic neutral atom images of a narrow flow channel from the plasma sheet: Astrid-1 observations, Journal of Geophysical Research, Vol. 107, No. A10, 1273, doi:10.1029/2001JA000230, 2002.

32.     Ebihara, Y., M. Yamauchi, H. Nilsson, R. Lundin, and M. Ejiri, "Wedge-like dispersion of sub-keV ions: Particle simulation and Viking observation", Journal of Geophysical Research, Vol. 106, No. A12, 29,571-29,584, 2001.

33.     Hoeymork, S. H., M. Yamauchi, Y. Ebihara, Y. Narita, O. Norberg, D. Winningham, Dense ion clouds of 0.1-2 keV ions inside the CPS-region observed by Astrid-2, Annales Geophysicae, Vol. 19, No. 6, 621-632, 2001.

34.     Ebihara, Y. and M. Ejiri, "Simulation study on the fundamental property of storm-time ring currents", Journal of Geophysical Research, Vol. 105, No. A7, 15843-15859, 2000.

35.     Ebihara, Y. and M. Ejiri, "Quantitative ring current model: Overview and comparison with observations", Advances in Polar Upper Atmosphere Research, No.13, 1-36, 1999.

36.     Ebihara, Y., S. Barabash and M. Ejiri, "On the global production rates of energetic neutral atoms (ENAs) and their association with the Dst index",　Geophysical Research Letters, Vol. 26, No.19, 2929-2932, 1999.

37.     Ebihara, Y., M. Ejiri and H. Miyaoka, "Ring current formation: A case study of the storm on February 13, 1972",　Proceedings of the NIPR Symposium on Upper Atmosphere Physics, No.12, 1-11, 1999.

38.     Ebihara, Y. and M. Ejiri, "Modeling of solar wind control of the ring current buildup: A case study of the magnetic　storms in April 1997",　Geophysical Research Letters, Vol. 25 , No.20 , 3751-3754, 1998.

39.     Ebihara, Y., H. Miyaoka and M. Ejiri, "The enhancements of differential flux of energetic particles associated with a magnetic storm",　Proceedings of the NIPR Symposium on Upper Atmosphere Physics, No.11, 150-153, 1998.

40.     Ebihara, Y., M. Ejiri and H. Miyaoka, "Coulomb lifetime of the ring current ions with time varying plasmasphere",　Earth, Planets and Space, Vol. 50, 371-382, 1998.

41.     Ebihara, Y., H. Miyaoka, F. Tohyama and M. Ejiri, "Loss effects for energetic protons associated with a magnetic storm in the inner magnetosphere", Proceedings of the NIPR Symposium on Upper Atmosphere Physics, No.10, 16-28, 1997.

42.     Ebihara, Y., A. Kadokura, Y. Tonegawa, F. Tohyama, N. Sato, Y. Hirasima, M. Namiki, E. A. Bering, III, J. R.　Benbrook and M. Ejiri, "A convection enhancement event observed with the polar patrol balloon #4", Proceedings of the NIPR Symposium on Upper Atmosphere Physics, No.9, 12-24, 1996.