Items where Author is "Grocott, A."

Walach, M.‐T. and Fogg, A. R. and Coxon, J. C. and Grocott, A. and Milan, S. E. and Sangha, H. K. and McWilliams, K. A. and Vines, S. K. and Lester, M. and Anderson, B. J. (2025) Reliability of Matching AMPERE Field‐Aligned Current Boundaries With SuperDARN Lower Latitude Ionospheric Convection Boundaries During Geomagnetic Storms. Journal of Geophysical Research: Space Physics, 130 (1): e2024JA033. ISSN 2169-9402

Lam, M. M. and Shore, R. M. and Chisham, G. and Freeman, M. P. and Grocott, A. and Walach, M.‐T. and Orr, L. (2023) A Model of High Latitude Ionospheric Convection Derived From SuperDARN EOF Model Data. Space Weather, 21 (7): e2023SW003. ISSN 1542-7390

Yukimatu, A.S. and Grocott, A. and Thomas, E.G. and Nagatsuma, T. and Nishitani, N. and Hosokawa, K. and Watanabe, M. (2021) Editorial: Special issue: “SuperDARN / Studies of Geospace Dynamics - Today and Future”. Polar Science, 28.

Walach, M.‐T. and Grocott, A. and Milan, S. E. (2021) Average Ionospheric Electric Field Morphologies during Geomagnetic Storm Phases. Journal of Geophysical Research: Space Physics, 126 (4): e2020JA028. ISSN 2169-9402

Billett, D. D. and Grocott, A. and Wild, J. A. and Walach, M.-t. and Kosch, M. J. (2018) Diurnal variations in global Joule heating morphology and magnitude due to neutral winds. Journal of Geophysical Research: Space Physics, 123 (3). pp. 2398-2411. ISSN 2169-9402

Walach, M.-t. and Milan, S. E. and Murphy, K. R. and Carter, J. A. and Hubert, B. A. and Grocott, A. (2017) Comparative study of large-scale auroral signatures of substorms, steady magnetospheric convection events, and sawtooth events. Journal of Geophysical Research: Space Physics, 122 (6). pp. 6357-6373. ISSN 2169-9402

Reistad, J. P. and Østgaard, N. and Tenfjord, P. and Laundal, K. M. and Snekvik, K. and Haaland, S. and Milan, S. E. and Oksavik, K. and Frey, H. U. and Grocott, A. (2016) Dynamic effects of restoring footpoint symmetry on closed magnetic field lines. Journal of Geophysical Research: Space Physics, 121 (5). pp. 3963-3977. ISSN 2169-9380

Weygand, J. M. and Kivelson, M. G. and Frey, H. U. and Rodriguez, J. V. and Angelopoulos, V. and Redmon, R. and Barker-Ream, J. and Grocott, A. and Amm, O. (2015) An interpretation of spacecraft and ground based observations of multiple omega band events. Journal of Atmospheric and Solar-Terrestrial Physics, 133. pp. 185-204. ISSN 1364-6826

Milan, S. E. and Grocott, A. and De Larquier, S. and Lester, M. and Yeoman, T. K. and Freeman, M. P. and Chisham, G. (2013) Traveling ionospheric disturbances in the Weddell Sea Anomaly associated with geomagnetic activity. Journal of Geophysical Research: Space Physics, 118 (10). pp. 6608-6617. ISSN 2169-9402

Grocott, A. and Hosokawa, K. and Ishida, T. and Lester, M. and Milan, S. E. and Freeman, M. P. and Sato, N. and Yukimatu, A. S. (2013) Characteristics of medium-scale travelling ionospheric disturbances observed near the Antarctic Peninsula by HF radar. Journal of Geophysical Research, 118 (9). 5830–5841. ISSN 0148-0227

Honkonen, I. and Rastätter, L. and Grocott, A. and Pulkkinen, A. and Palmroth, M. and Raeder, J. and Ridley, A. J. and Wiltberger, M. (2013) On the performance of global magnetohydrodynamic models in the Earth's magnetosphere. Space Weather, 11 (5). pp. 313-326. ISSN 1539-4956

Kunduri, B. S. R. and Baker, J. B. H. and Ruohoniemi, J. M. and Clausen, L. B. N. and Grocott, A. and Thomas, E. G. and Freeman, M. P. and Talaat, E. R. (2012) An examination of inter-hemispheric conjugacy in a subauroral polarization stream. Journal of Geophysical Research, 117 (A8): A08225. ISSN 0148-0227

Weygand, J. M. and Amm, O. and Angelopoulos, V. and Milan, S. E. and Grocott, A. and Gleisner, H. and Stolle, C. (2012) Comparison between SuperDARN flow vectors and equivalent ionospheric currents from ground magnetometer arrays. Journal of Geophysical Research, 117 (A5): A05325. ISSN 0148-0227

Grocott, A. and Milan, S. E. and Imber, S. M. and Lester, M. and Yeoman, T. K. (2012) A quantitative deconstruction of the morphology of high-latitude ionospheric convection. Journal of Geophysical Research, 117 (A5): 05317. ISSN 0148-0227

Grocott, A. and Milan, S. E. and Baker, J. B. H. and Freeman, M. P. and Lester, M. and Yeoman, T. K. (2011) Dynamic subauroral ionospheric electric fields observed by the Falkland Islands radar during the course of a geomagnetic storm. Journal of Geophysical Research, 116 (A11): A11202. ISSN 0148-0227

Wild, J.A. and Woodfield, E.E. and Donovan, E. and Fear, R.C. and Grocott, A. and Lester, M. and Fazakerley, A.N. and Lucek, E. and Khotyaintsev, Y. and Andre, M. and Kadokura, A. and Hosokawa, K. and Carlson, C. and McFadden, J.P. and Glassmeier, K.H. and Angelopoulos, V. and Björnsson, G. (2011) Midnight sector observations of auroral omega bands. Journal of Geophysical Research, 116 (A00I30): A00I30. ISSN 0148-0227

Milan, S. E. and Grocott, A. and Hubert, B. (2010) A superposed epoch analysis of auroral evolution during substorms : local time of onset region. Journal of Geophysical Research, 115 (A5): A00I04. ISSN 0148-0227

Nichols, J. D. and Cecconi, B. and Clarke, J. T. and Cowley, S. W. H. and Gérard, J.-c. and Grocott, A. and Grodent, D. and Lamy, L. and Zarka, P. (2010) Variation of Saturn's UV aurora with SKR phase. Geophysical Research Letters, 37 (15): L15102. ISSN 0094-8276

Shi, J. K. and Cheng, Z. W. and Zhang, T. L. and Dunlop, M. and Liu, Z. X. and Torkar, K. and Fazakerley, A. and Lucek, E. and Rème, H. and Dandouras, I. and Lui, A. T. Y. and Pu, Z. Y. and Walsh, A. P. and Volwerk, M. and Lahiff, A. D. and Taylor, M. G. G. T. and Grocott, A. and Kistler, L. M. and Lester, M. and Mouikis, C. and Shen, C. (2010) South-north asymmetry of field-aligned currents in the magnetotail observed by Cluster. Journal of Geophysical Research, 115 (A7): A07228. ISSN 0148-0227

Grocott, A. and Milan, S.E. and Yeoman, T.K. and Sato, N. and Yukimatu, A.S. and Wild, J.A. (2010) Superposed epoch analysis of the ionospheric convection evolution during substorms : IMF BY dependence. Journal of Geophysical Research, 115 (A5): A00106. ISSN 0148-0227

Amm, O. and Grocott, A. and Lester, M. and Yeoman, T. K. (2010) Local determination of ionospheric plasma convection from coherent scatter radar data using the SECS technique. Journal of Geophysical Research, 115 (A3): A03304. ISSN 0148-0227

Walsh, A. P. and Fazakerley, A. N. and Lahiff, A. D. and Volwerk, M. and Grocott, A. and Dunlop, M. W. and Lui, A. T. Y. and Kistler, L. M. and Lester, M. and Mouikis, C. and Pu, Z. and Shen, C. and Shi, J. and Taylor, M. G. G. T. and Lucek, E. and Zhang, T. L. and Dandouras, I. (2009) Cluster and Double Star multipoint observations of a plasma bubble. Annales Geophysicae, 27 (2). pp. 725-743. ISSN 0992-7689

Milan, S. E. and Grocott, A. and Forsyth, C. and Imber, S. M. and Boakes, P. D. and Hubert, B. (2009) A superposed epoch analysis of auroral evolution during substorm growth, onset and recovery : open magnetic flux control of substorm intensity. Annales Geophysicae, 27 (2). pp. 659-668. ISSN 0992-7689

Grocott, A. and Wild, J.A. and Milan, S.E. and Yeoman, T.K. (2009) Superposed epoch analysis of the ionospheric convection evolution during substorms : onset latitude dependence. Annales Geophysicae, 27 (2). pp. 591-600. ISSN 0992-7689

Hubert, B. and Milan, S. E. and Grocott, A. and Cowley, S. W. H. and Gérard, J. C. (2008) Open magnetic flux and magnetic flux closure during sawtooth events. Geophysical Research Letters, 35 (23): L23301. ISSN 0094-8276

Volwerk, M. and Lui, A. T. Y. and Lester, M. and Walsh, A. P. and Alexeev, I. and Cao, X. and Dunlop, M. W. and Fazakerley, A. N. and Grocott, A. and Kistler, L. and Lun, X. and Mouikis, C. and Pu, Z. and Shen, C. and Shi, J. K. and Taylor, M. G. G. T. and Baumjohann, W. and Nakamura, R. and Runov, A. and Vörös, Z. and Zhang, T. L. and Takada, T. and Rème, H. and Klecker, B. and Carr, C. M. (2008) Magnetotail dipolarization and associated current systems observed by Cluster and Double Star. Journal of Geophysical Research, 113 (A8): A08S90. ISSN 0148-0227

Lui, A. T. Y. and Volwerk, M. and Dunlop, M. W. and Alexeev, I. V. and Fazakerley, A. N. and Walsh, A. P. and Lester, M. and Grocott, A. and Mouikis, C. and Henderson, M. G. and Kistler, L. M. and Shen, C. and Shi, J. K. and Zhang, T. L. and Rème, H. (2008) Near-Earth substorm features from multiple satellite observations. Journal of Geophysical Research, 113 (A7): A07S26. ISSN 0148-0227

Grocott, A. and Milan, S. E. and Yeoman, T. K. (2008) Interplanetary magnetic field control of fast azimuthal flows in the nightside high-latitude ionosphere. Geophysical Research Letters, 35 (8): L08102. ISSN 0094-8276

Wild, James A. and Grocott, A. (2008) The influence of magnetospheric substorms on SuperDARN radar backscatter. Journal of Geophysical Research, 113: A04308. ISSN 0148-0227

Forsyth, C. and Lester, M. and Cowley, S. W. H. and Dandouras, I. and Fazakerley, A. N. and Fear, R. C. and Frey, H. U. and Grocott, A. and Kadokura, A. and Lucek, E. and Rème, H. and Milan, S. E. and Watermann, J. (2008) Observed tail current systems associated with bursty bulk flows and auroral streamers during a period of multiple substorms. Annales Geophysicae, 26 (1). pp. 167-184. ISSN 0992-7689

Hubert, B. and Kauristie, K. and Amm, O. and Milan, S. E. and Grocott, A. and Cowley, S. W. H. and Pulkkinen, T. I. (2007) Auroral streamers and magnetic flux closure. Geophysical Research Letters, 34 (15): L15105. ISSN 0094-8276

Grocott, A. and Yeoman, T. K. and Milan, S. E. and Amm, O. and Frey, H. U. and Juusola, L. and Nakamura, R. and Owen, C. J. and Rème, H. and Takada, T. (2007) Multi-scale observations of magnetotail flux transport during IMF-northward non-substorm intervals. Annales Geophysicae, 25 (7). pp. 1709-1720. ISSN 0992-7689

Farrugia, C. J. and Grocott, A. and Sandholt, P. E. and Cowley, S. W. H. and Miyoshi, Y. and Rich, F. J. and Jordanova, V. K. and Torbert, R. B. and Sharma, A. (2007) The magnetosphere under weak solar wind forcing. Annales Geophysicae, 25 (1). pp. 191-205. ISSN 0992-7689

Chisham, G. and Lester, M. and Milan, S. E. and Freeman, M. P. and Bristow, W. A. and Grocott, A. and Mcwilliams, K. A. and Ruohoniemi, J. M. and Yeoman, T. K. and Dyson, P. L. and Greenwald, R. A. and Kikuchi, T. and Pinnock, M. and Rash, J. P. S. and Sato, N. and Sofko, G. J. and Villain, J.-p. and Walker, A. D. M. (2007) A decade of the Super Dual Auroral Radar Network (SuperDARN) : scientific achievements, new techniques and future directions. Surveys in Geophysics, 28 (1). pp. 33-109. ISSN 0169-3298

Grocott, A. and Lester, M. and Parkinson, M. L. and Yeoman, T. K. and Dyson, P. L. and Devlin, J. C. and Frey, H. U. (2006) Towards a synthesis of substorm electrodynamics : HF radar and auroral observations. Annales Geophysicae, 24 (12). pp. 3365-3381. ISSN 0992-7689

Hu, H. and Yeoman, T. K. and Lester, M. and Liu, R. and Yang, H. and Grocott, A. (2006) Dayside flow bursts and high-latitude reconnection when the IMF is strongly northward. Annales Geophysicae, 24 (8). pp. 2227-2242. ISSN 0992-7689

Hubert, B. and Palmroth, M. and Laitinen, T. V. and Janhunen, P. and Milan, S. E. and Grocott, A. and Cowley, S. W. H. and Pulkkinen, T. and Gérard, J.-c. (2006) Compression of the Earth's magnetotail by interplanetary shocks directly drives transient magnetic flux closure. Geophysical Research Letters, 33 (10): L10105. ISSN 0094-8276

Hubert, B. and Milan, S. E. and Grocott, A. and Blockx, C. and Cowley, S. W. H. and Gérard, J.-c. (2006) Dayside and nightside reconnection rates inferred from IMAGE FUV and Super Dual Auroral Radar Network data. Journal of Geophysical Research, 111 (A3): A03217. ISSN 0148-0227

Draper, N. C. and Lester, M. and Cowley, S. W. H. and Bosqued, J. M. and Grocott, A. and Wild, J. A. and Bogdanova, Y. V. and Fazakerley, A. N. (2006) Cluster observations of a magnetic field cavity in the plasma sheet. Advances in Space Research, 38 (8). pp. 1738-1743. ISSN 0273-1177

Milan, S. E. and Wild, J. A. and Grocott, A. and Draper, N. C. (2006) Space- and ground-based investigations of solar wind-magnetosphere-ionosphere coupling. Advances in Space Research, 38 (8). pp. 1671-1677. ISSN 0273-1177

Draper, N. C. and Lester, M. and Cowley, S. W. H. and Wild, J. A. and Milan, S. E. and Provan, G. and Grocott, A. and Fazakerley, A. N. and Lahiff, A. and Davies, J. A. and Bosqued, J. M. and Dewhurst, J. P. and Nakamura, R. and Owen, C. J. and Watermann, J. F. and Henderson, M. G. and Singer, H. J. and Donovan, E. (2005) Cluster magnetotail observations of a tailward-travelling plasmoid at substorm expansion phase onset and field aligned currents in the plasma sheet boundary layer. Annales Geophysicae, 23 (12). pp. 3667-3683. ISSN 0992-7689

Provan, G. and Lester, M. and Cowley, S. W. H. and Grocott, A. and Milan, S. E. and Hubert, B. and Khan, Hina (2005) Modulation of dayside reconnection during northward interplanetary magnetic field. Journal of Geophysical Research, 110 (A10): A10211. ISSN 0148-0227

Grocott, A. and Yeoman, T. K. and Milan, S. E. and Cowley, S. W. H. (2005) Interhemispheric observations of the ionospheric signature of tail reconnection during IMF-northward non-substorm intervals. Annales Geophysicae, 23 (5). pp. 1763-1770. ISSN 0992-7689

Provan, G. and Lester, M. and Grocott, A. and Cowley, S. W. H. (2005) Pulsed flows observed during an interval of prolonged northward IMF. Annales Geophysicae, 23 (4). pp. 1207-1225. ISSN 0992-7689

Nakamura, R. and Amm, O. and Laakso, H. and Draper, N. C. and Lester, M. and Grocott, A. and Klecker, B. and Mccrea, I. W. and Balogh, A. and Rème, H. and André, M. (2005) Localized fast flow disturbance observed in the plasma sheet and in the ionosphere. Annales Geophysicae, 23 (2). pp. 553-566. ISSN 0992-7689

Milan, S. E. and Hubert, B. and Grocott, A. (2005) Formation and motion of a transpolar arc in response to dayside and nightside reconnection. Journal of Geophysical Research, 110 (A1): A01212. ISSN 0148-0227

Draper, N. C. and Lester, M. and Wild, J. A. and Milan, S. E. and Provan, G. and Grocott, A. and Cowley, S. W. H. and Bogdanova, Y. V. and Dewhirst, J. P. and Fazakerley, A. N. and Davies, J. A. and Bosqued, J. M. (2004) A joint cluster and ground-based instrument study of two magnetospheric substorm events on 1st september 2002. Annales Geophysicae, 22 (12). pp. 4217-4228. ISSN 0992-7689

Grocott, A. and Badman, S. V. and Cowley, S. W. H. and Yeoman, T. K. and Cripps, P. J. (2004) The influence of IMF By on the nature of the nightside high-latitude ionospheric flow during intervals of positive IMF Bz. Annales Geophysicae, 22 (5). pp. 1755-1764. ISSN 0992-7689

Grocott, A. and Yeoman, T.K. and Nakamura, R. and Cowley, S.W.H. and Frey, H.U. and Rème, H. and Klecker, B. (2004) Multi-instrument observations of the ionospheric counterpart of a bursty bulk flow in the near-Earth plasma sheet. Annales Geophysicae, 22 (4). pp. 1061-1075. ISSN 0992-7689

Grocott, A. and Cowley, S.W.H. and Sigwarth, J.B. (2003) Ionospheric flow during extended intervals of northward but BY-dominated IMF. Annales Geophysicae, 21 (2). pp. 509-538. ISSN 0992-7689

Cowley, S. W. H. and Davies, J. A. and Grocott, A. and Khan, H. and Lester, M. and McWilliams, K. A. and Milan, S. E. and Provan, G. and Sandholt, P. E. and Wild, J. A. and Yeoman, T. K. (2003) Solar wind-magnetosphere-ionosphere interactions in the earth's plasma environment. Philosophical Transactions of the Royal Society of London A, 361 (1802). pp. 113-126. ISSN 0264-3820

Maynard, N. C. and Ober, D. M. and Burke, W. J. and Scudder, J. D. and Lester, M. and Dunlop, M. W. and Wild, J. A. and Grocott, A. and Farrugia, C. J. and Lund, E. and Russell, C. T. and Weimer, D. R. and Siebert, K. D. and Balogh, A. and André, M. and Rème, H. (2003) Polar, Cluster and SuperDARN evidence for high latitude merging during southward IMF: temporal/spatial evolution. Annales Geophysicae, 21 (12). pp. 2233-2258. ISSN 0992-7689

Grocott, A. and Cowley, S.W.H. and Sigwarth, J.B. and Watermann, J.F. and Yeoman, T.K. (2002) Excitation of twin-vortex flow in the nightside high-latitude ionosphere during an isolated substorm. Annales Geophysicae, 20 (10). pp. 1577-1601. ISSN 0992-7689