BAS UASD Theory and Modelling: Recent Publications
Recent Publications

Freeman, M. P., and D. J. Southwood, The effect of magnetospheric erosion on mid- and high-latitude ionospheric flows, Planet. Space Sci., 36, 509-522, 1988.

Freeman, M. P., and D. J. Southwood, The correlations of variations in the IMF with magnetosheath field variations, Adv. Space Res., 8, 217-220, 1988.

Waldock, J. A., D. J. Southwood, M. P. Freeman, and M. Lester, Pulsations observed during high-speed flow in the ionosphere, J. Geophys. Res., 93, 12883-12891, 1988.

Lockwood, M., and M. P. Freeman, Recent ionospheric observations relating to solar wind-magnetosphere coupling, Phil. Trans. R. Soc. (London), A, 328, 93-105, 1989.

Farrugia, C. J., M. P. Freeman, S. W. H. Cowley, D. J. Southwood, M. Lockwood, and A. Etemadi, Pressure-driven magnetopause motions and attendant response on the ground, Planet. Space Sci., 37, 589-607, 1989.

Freeman, M. P., C. J. Farrugia, S. W. H. Cowley, and A. Etemadi, The response of dayside ionospheric convection to the Y component of the magnetosheath magnetic field: a case study, Planet. Space Sci., 38, 13-41, 1990.

Lockwood, M., S. W. H. Cowley, and M. P. Freeman, The excitation of plasma convection in the high-latitude ionosphere, J. Geophys. Res., 95, 7961-7972, 1990.

Freeman, M. P., C. J. Farrugia, S. W. H. Cowley, D. J. Southwood, M. Lockwood, and A. Etemadi, The response of the magnetosphere-ionosphere system to solar wind dynamic pressure variations, AGU monograph on Physics of Magnetic Flux Ropes, 58, 611-618, 1990.

Freeman, M. P., D. J. Southwood, M. Lester, and J. A. Waldock, Measurements of field-aligned currents by the SABRE coherent scatter radar: the identification of a region II current sheet in the E-region ionosphere, AGU monograph on Physics of Magnetic Flux Ropes, 58, 575-580, 1990.

Lester, M., M. P. Freeman, D. J. Southwood, J. A. Waldock, and H. J. Singer, A study of the relationship between interplanetary parameters and large displacements of the nightside polar cap boundary, J. Geophys. Res., 95, 21133-21145, 1990.

Farrugia, C. J., S. Elliott, and M. P. Freeman, Observational aspects of solar wind - magnetosphere interactions from multipoint measurements made on 1 November, 1984, in "Theoretical Problems in Space and Fusion Plasmas, eds. H. K. Biernat, S.J.Bauer and M. Heindler, pp.9-29, 1991.

Farrugia, C. J., M. W. Dunlop, S. Elliott, M. P. Freeman, A. Balogh, S. W. H. Cowley, R. P. Lepping, and D. G. Sibeck, Multipoint observations of planar interplanetary magnetic field structures, J. Atmos. Terr. Phys., 53, 1039-1047, 1991.

Freeman, M. P., J. M. Ruohoniemi, and R. A. Greenwald, The determination of time-stationary two-dimensional convection patterns with single-station radars, J. Geophys. Res., 96, 15735-15749, 1991.

Farrugia, C. J., and M. P. Freeman, Ionospheric signatures of magnetopause processes, in "Solar Wind-Magnetosphere Interactions", eds. M.F.Heyn, H. K. Biernat, V. S. Semenov, and R.P.Rijnbeek, pp. 229-249, 1992.

Freeman, M. P., D. J. Southwood, M. Lester, T.K.Yeoman, and G.D.Reeves, Substorm-associated radar auroral surges, J.Geophys. Res., 97, 12173-12185, 1992.

Dunlop,M.W., M.P.Freeman, and C.J.Farrugia, Comment on "Solar wind control of the magnetopause shape, location, and motion" by D.G.Sibeck, R.E.Lopez, and E.C.Roelof, J.Geophys. Res., 97, 10875-10877, 1992.

Saunders, M.A., Freeman, M.P., Southwood, D.J., Cowley, S.W.H., Lockwood, M., Samson, J.C., Farrugia, C.J. and Hughes, T.J. (1992). Dayside ionospheric convection changes in response to long-period interplanetary magnetic field oscillations: Determination of the ionospheric phase velocity, J. Geophys. Res., 97, 19373-19380

Cowley, S.W.H., Morelli, J.P., Freeman, M.P., Lockwood, M. and Smith, M.F. (1992). Excitation and decay of flows in the magnetosphere-ionosphere system due to magnetic reconnection at the dayside magnetopause and in the geomagnetic tail, Proc. International Conference on Substorms (ICS-1), ESA-ST 335, 117-123.

Farrugia, C.J., Freeman, M.P., Burlaga, L.F., Lepping, R.P. and Takahashi, K. (1992). Magnetic cloud passage at 1 AU and associated substorm activity, Proc. International Conference on Substorms (ICS-1), ESA-ST 335.

Farrugia, C.J., Osherovich, V.A., Burlaga, L.F., Lepping, R.P. and Freeman, M.P. (1992). Radial expansion of an ideal MHD configuration and the temporal development of the magnetic field, Proc. Solar Wind Seven Conference, Germany.

Farrugia, C. J., M. P. Freeman, L. F. Burlaga, and R. P. Lepping, The magnetic cloud observed at 1 AU on January 14/15, 1988, in "Current Research on Fusion, Laboratory and Astrophysical Plasmas, eds. S.Kuhn, K.Schöpf, and R.Schrittwieser, pp. 208-222, 1993.

Morelli,J.P., R.J.Bunting, S.W.H.Cowley, C.J.Farrugia, M.P.Freeman, E.Friis-Christensen, G.O.L.Jones, M.Lester, R.V.Lewis, H.Lühr, D.Orr, M.Pinnock, G.D.Reeves, P.J.S.Williams, and T.K.Yeoman, Plasma flow bursts in the nightside auroral zone ionosphere and their relation to geomagnetic activity, Adv. Space Res., 13, 135-138, 1993.

Lester,M., O.delaBeaujardière, J.C.Foster, M.P.Freeman, H.Lühr, J. M. Ruohoniemi, and W.Swider, The response of the large scale ionospheric convection pattern to changes in the IMF and substorms: Results from the SUNDIAL 1987 campaign, Annales Geophysicæ, 11, 556-571, 1993.

Farrugia,C.J., L.F.Burlaga, V.Osherovich, I.G.Richardson, M.P.Freeman, R.P.Lepping, and A.Lazarus, A study of an expanding interplanetary magnetic cloud and its interaction with the Earth's magnetosphere: The interplanetary aspect, J.Geophys.Res., 98, 7621-7632, 1993.

Freeman,M.P., C.J.Farrugia, L.F.Burlaga, M.R.Hairston, M.E.Greenspan, J.M.Ruohoniemi, and R.P.Lepping, The interaction of a magnetic cloud with the Earth: Ionospheric convection in the northern and southern hemispheres for a wide range of quasi-steady interplanetary magnetic field conditions, J.Geophys.Res., 98, 7633-7655, 1993.

Farrugia,C.J., M.P.Freeman, L.F.Burlaga, R.P.Lepping, and K.Takahashi, The Earth's magnetosphere under continued forcing: Substorm activity during the passage of an interplanetary magnetic cloud, J.Geophys.Res., 98, 7657-7671, 1993.

Yeoman, T. K., M. P. Freeman, G. D. Reeves, M. Lester, and D. Orr, A comparison of midlatitude Pi2 pulsations and geostationary orbit particle injections as substorm indicators, J. Geophys. Res., 99, 4085-4093, 1994.

Farrugia, C. J., and M. P. Freeman, Reply, J. Geophys. Res., 99, 14941-14945, 1994.

Fox, N. J., M. Lockwood, S. W. H. Cowley, M. P. Freeman, E. Friis-Christensen, D. K. Milling, M.Pinnock, and G. D. Reeves, EISCAT observations of unusual flows in the morning sector associated with weak substorm activity, Ann. Geophys., 12, 541-553, 1994.

Morelli, J. P. R. J. Bunting, S. W. H. Cowley, C. J. Farrugia, M. P. Freeman, E. Friis-Christensen, G.O. L. Jones, M. Lester, R. V. Lewis, H. Lühr, D. Orr, M. Pinnock, G. D. Reeves, P. J. S. Williams, and T. K. Yeoman, Radar observations of auroral zone flows during a multiple-onset substorm, submitted to Ann. Geophys., 1994.

Morrison, K., and M. P. Freeman, The role of upstream ULF waves in the generation of quasi-periodic ELF-VLF emissions, Ann. Geophys., 13, 1127-1133, 1995.

Freeman, M. P., and C. J. Farrugia, A statistical study of the possible effects of solar wind variability on the recurrence rate of substorms, J. Geophys. Res., 100, 23607-23619, 1995.

Freeman, M. P., N. C. Freeman, and C. J. Farrugia, A linear perturbation analysis of magnetopause motion in the Newton-Busemann limit, Ann. Geophys., 13, 907-918, 1995.

Freeman, M. P., A magnetohydrodynamic simulation of the response of the magnetopause to a pressure impulse, submitted to Ann. Geophys., 1995.

Smith, A. J., M. P. Freeman, and G. D. Reeves, Post-midnight VLF chorus events, a substorm signature observed at the ground near L=4, submitted to J. Geophys. Res., 1996.

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