Article

Bowe, G. A., Hapgood, M. A., Lockwood, M. ORCID: https://orcid.org/0000-0002-7397-2172 and Willis, D. M. (1990) Short-term variability of solar wind number density, speed and dynamic pressure as a function of the interplanetary magnetic field components: A survey over two solar cycles. Geophysical Research Letters, 17 (11). pp. 1825-1828. ISSN 00948276 doi: https://doi.org/10.1029/GL017i011p01825

Carnevale, G. F. and Shepherd, T. G. ORCID: https://orcid.org/0000-0002-6631-9968 (1990) On the interpretation of Andrews’ theorem. Geophysical & Astrophysical Fluid Dynamics, 51 (1-4). pp. 1-17. ISSN 1029-0419 doi: https://doi.org/10.1080/03091929008219847

Elphic, R. C., Lockwood, M. ORCID: https://orcid.org/0000-0002-7397-2172, Cowley, S. W. H. and Sandholt, P. E. (1990) Flux transfer events at the magnetopause and in the ionosphere. Geophysical Research Letters, 17 (12). pp. 2241-2244. ISSN 0094-8276 doi: https://doi.org/10.1029/GL017i012p02241

Jones, G.O.L., Williams, P.J.S., Winser, K.J. and Lockwood, M. ORCID: https://orcid.org/0000-0002-7397-2172 (1990) Characteristics of the high-latitude trough. Advances in Space Research, 10 (6). pp. 191-196. ISSN 02731177 doi: https://doi.org/10.1016/0273-1177(90)90253-V

Kautsky, J. and Nichols, N. ORCID: https://orcid.org/0000-0003-1133-5220 (1990) Robust pole assignment in systems subject to structured perturbations. Systems & Control Letters, 15 (5). pp. 373-380. ISSN 0167-6911 doi: https://doi.org/10.1016/0167-6911(90)90060-8

Keating, J.G., Mulligan, F.J., Doyle, D.B., Winser, K.J. and Lockwood, M. ORCID: https://orcid.org/0000-0002-7397-2172 (1990) A statistical study of large field-aligned flows of thermal ions at high-latitudes. Planetary and Space Science, 38 (9). pp. 1187-1201. ISSN 0032-0633 doi: https://doi.org/10.1016/0032-0633(90)90026-M

Lockwood, M. ORCID: https://orcid.org/0000-0002-7397-2172 and Smith, M. F. (1990) Reply to Comment on: ’Low-altitude signatures of the cusp and flux transfer events’ by Mike Lockwood and Mark F. Smith. Geophysical Research Letters, 17 (5). pp. 657-658. ISSN 00948276 doi: https://doi.org/10.1029/GL017i005p00657

Lockwood, M. ORCID: https://orcid.org/0000-0002-7397-2172, Cowley, S. W. H. and Freeman, M. P. (1990) The excitation of plasma convection in the high-latitude ionosphere. Journal of Geophysical Research, 95 (A6). pp. 7961-7972. ISSN 0148-0227 doi: https://doi.org/10.1029/JA095iA06p07961

Lockwood, M. ORCID: https://orcid.org/0000-0002-7397-2172, Cowley, S. W. H. and Sandholt, P. E. (1990) Transient reconnection: Search for ionospheric signatures. Eos, Transactions American Geophysical Union, 71 (20). pp. 709-720. ISSN 0096-3941 doi: https://doi.org/10.1029/EO071i020p00709-02

Lockwood, M. ORCID: https://orcid.org/0000-0002-7397-2172, Cowley, S. W. H., Sandholt, P. E. and Lepping, R. P. (1990) The ionospheric signatures of flux transfer events and solar wind dynamic pressure changes. Journal of Geophysical Research, 95 (A10). p. 17113. ISSN 0148-0227 doi: https://doi.org/10.1029/JA095iA10p17113

Lockwood, M. ORCID: https://orcid.org/0000-0002-7397-2172, Sandholt, P.E., Farmer, A.D., Cowley, S.W.H., Lybekk, B. and Davda, V.N. (1990) Auroral and plasma flow transients at magnetic noon. Planetary and Space Science, 38 (8). pp. 973-993. ISSN 0032-0633 doi: https://doi.org/10.1016/0032-0633(90)90043-P

Robinson, R.M., Clauer, C.R., De La Beaujardiere, O., Kelly, J.D., Friis-christensen, E. and Lockwood, M. ORCID: https://orcid.org/0000-0002-7397-2172 (1990) Sondrestrom and EISCAT radar observations of poleward-moving auroral forms. Journal of Atmospheric and Terrestrial Physics, 52 (6-8). pp. 411-420. ISSN 00219169 doi: https://doi.org/10.1016/0021-9169(90)90040-T

Sandholt, P. E. and Lockwood, M. ORCID: https://orcid.org/0000-0002-7397-2172 (1990) Periodic auroral events at the high-latitude convection reversal in the 16 MLT region. Geophysical Research Letters, 17 (11). pp. 1877-1880. ISSN 0094-8276 doi: https://doi.org/10.1029/GL017i011p01877

Sandholt, P. E., Lockwood, M. ORCID: https://orcid.org/0000-0002-7397-2172, Lybekk, B. and Farmer, A. D. (1990) Auroral bright spot sequence near 1400 MLT: Coordinated optical and ion drift observations. Journal of Geophysical Research, 95 (A12). pp. 21095-21110. ISSN 0148-0227 doi: https://doi.org/10.1029/JA095iA12p21095

Sandholt, P. E., Lockwood, M. ORCID: https://orcid.org/0000-0002-7397-2172, Oguti, T., Cowley, S. W. H., Freeman, K. S. C., Lybekk, B., Egeland, A. and Willis, D. M. (1990) Midday auroral breakup events and related energy and momentum transfer from the magnetosheath. Journal of Geophysical Research, 95 (A2). pp. 1039-1060. ISSN 0148-0227 doi: https://doi.org/10.1029/JA095iA02p01039

Shepherd, T. G. ORCID: https://orcid.org/0000-0002-6631-9968 (1990) A general method for finding extremal states of Hamiltonian dynamical systems, with applications to perfect fluids. Journal of Fluid Mechanics, 213 (1). pp. 573-587. ISSN 0022-1120 doi: https://doi.org/10.1017/S0022112090002452

Smith, M. F. and Lockwood, M. ORCID: https://orcid.org/0000-0002-7397-2172 (1990) The pulsating cusp. Geophysical Research Letters, 17 (8). pp. 1069-1072. ISSN 00948276 doi: https://doi.org/10.1029/GL017i008p01069

Winser, K.J., Lockwood, M. ORCID: https://orcid.org/0000-0002-7397-2172, Jones, G.O.L., Rishbeth, H. and Ashford, M.G. (1990) Measuring ion temperatures and studying the ion energy balance in the high-latitude ionosphere. Journal of Atmospheric and Terrestrial Physics, 52 (6-8). pp. 501-517. ISSN 00219169 doi: https://doi.org/10.1016/0021-9169(90)90049-S

Book or Report Section

Bengtsson, L. (1990) Advances in the numerical prediction of the atmospheric circulation in the extra-tropics. In: Extratropical Cyclones. The Erik Palmén Memorial Volume. American Meteorological Society, pp. 194-217. ISBN 978-9991125718

Bengtsson, L. (1990) Next Friday's weather. In: Scientific Europe - Research and Technology in 20 Countries. Foundation Scientific Europe, pp. 174-181. ISBN 9073035066

Bunse-Gerstner, A., Mehrmann, V. and Nichols, N. ORCID: https://orcid.org/0000-0003-1133-5220 (1990) On derivative and proportional feedback design for descriptor systems. In: Kaashoek, M. A., Van Schuppen, J. H. and Ran, A. C. M. (eds.) Signal Processing, Scattering and Operator Theory, and Numerical Methods. Birkhauser, Boston, pp. 437-446.

Freeman, M. P., Farrugia, C. J., Cowley, S. W. H., Southwood, D. J., Lockwood, M. ORCID: https://orcid.org/0000-0002-7397-2172 and Etemadi, A. (1990) The response of the magnetosphere-ionosphere system to solar wind dynamic pressure variations. In: Physics of Magnetic Flux Ropes. in "Physics of magnetic flux ropes", ed. C.T. Russell, E.R. Priest and L.C. Lee, Geophys. Monograph 58, 58. American Geophysical Union, Washington, D.C., USA, pp. 611-618. doi: https://doi.org/10.1029/GM058p0611

Shepherd, T. G. ORCID: https://orcid.org/0000-0002-6631-9968 (1990) Isovortical constraints on the statistical-dynamical behaviour of strongly nonlinear two-dimensional and quasi-geostrophic flow. In: Moffatt, H. K. and Tsinober, A. (eds.) Topological fluid mechanics. Cambridge University Press, Cambridge, pp. 278-287. ISBN 0521381452

Shepherd, T. G. ORCID: https://orcid.org/0000-0002-6631-9968 (1990) Symmetries, conservation laws, and Hamiltonian structure in geophysical fluid dynamics. In: Dmowska, R. (ed.) Advances in Geophysics. Elsevier, pp. 287-338. doi: https://doi.org/10.1016/S0065-2687(08)60429-X

Smith, M. F., Winningham, J. D., Slavin, J. A. and Lockwood, M. ORCID: https://orcid.org/0000-0002-7397-2172 (1990) DE-2 observations of filamentary currents at ionospheric altitudes. In: Physics of Magnetic Flux Ropes. Amarican Geophysical Union, Washington, D.C., USA, pp. 591-598. doi: https://doi.org/10.1029/GM058p0591 (edited by: C.T. Russell, E.R. Priest and L.C. Lee, Geophys. Monograph Ser. 58)

Report

Andrews, T. P., Nichols, N. ORCID: https://orcid.org/0000-0003-1133-5220 and Xu, Z., (1990) The form of optimal controllers for tidal power generation schemes. Numerical Analysis Technical Report. 8/90. Technical Report. The University of Reading, Reading.