The University of Southampton

Dr John Coxon

Dr John Coxon is a postdoctoral research assistant in the Space Environment Physics group, working with Dr Rob Fear. His research interests include currents in near-Earth space known as Birkeland currents. He also studies transpolar arcs (TPAs) and flux transfer events (FTEs), two signatures of the processes by which the Sun and Earth's magnetic fields interconnect.

John is the lead of the Planeterrella public engagement programme, and has experience teaching in both schools and universities. He is also on MIST Council, the governing body of an organisation representing Magnetosphere, Ionosphere and Solar-Terrestrial researchers in the UK.

Publications

Coxon, John, Jackman, Caitriona and Freeman, Mervyn P. et al. (2016) Identifying the magnetotail lobes with Cluster magnetometer data. Journal of Geophysical Research, 121 (2), 1436-1446. (doi:10.1002/2015JA022020).

Coxon, J.C., Milan, S.E., Carter, J.A., Clausen, L.B.N., Anderson, B.J. and Korth, H. (2016) Seasonal and diurnal variations in AMPERE observations of the Birkeland currents compared to modeled results. Journal of Geophysical Research: Space Physics, 121, 1-14. (doi:10.1002/2015JA022050).

Forsyth, C., Rae, I., Murphy, K., Freeman, M., Huang, C.-L., Spence, H., Boyd, A., Coxon, J., Jackman, C., Kalmoni, N. and Watt, C. (2016) What effect do substorms have on the content of the radiation belts? Journal of Geophysical Research: Space Physics, 1-15. (doi:10.1002/2016JA022620).

Coxon, John, Sandhu, Jasmine, Kalmoni, Nadine, Gray, Rebecca, Kinrade, Joe and McCrea, Ian (2016) Autumn MIST 2015. Astronomy & Geophysics, 57 (3), 3.21-3.24. (doi:10.1093/astrogeo/atw099).

Coxon, John, Rae, I. Jonathan, Forsyth, Colin, Jackman, Caitriona M., Fear, Robert C. and Anderson, Brian J. (2017) Birkeland currents during substorms: Statistical evidence for intensification of Regions 1 and 2 currents after onset and a localized signature of auroral dimming. Journal of Geophysical Research: Space Physics, 122 (6). (doi:10.1002/2017JA023967).

Fear, R.C., Trenchi, L., Coxon, J.C. and Milan, S. E. (2017) How much flux does a flux transfer event transfer? Journal of Geophysical Research: Space Physics, 122 (12), 12310-12327. (doi:10.1002/2017JA024730).

Forsyth, C., Rae, I.J., Coxon, J.C., Freeman, M.P., Jackman, C.M., Gjerloev, J. and Fazakerley, A.N. (2015) A new technique for determining Substorm Onsets and Phases from Indices of the Electrojet (SOPHIE). Journal of Geophysical Research: Space Physics, 120 (12), 10592-10606. (doi:10.1002/2015JA021343).

Milan, S.E., Clausen, L.B.N., Coxon, J.C., Carter, J.A., Walach, M.-T., Laundal, K., Østgaard, N., Tenfjord, P., Reistad, J., Snekvik, K., Korth, H. and Anderson, B.J. (2017) Overview of solar wind–magnetosphere–ionosphere–atmosphere coupling and the generation of magnetospheric currents. Space Science Reviews, 206 (1-4), 547-573. (doi:10.1007/s11214-017-0333-0).

Laundal, K.M., Cnossen, I., Milan, S.E., Haaland, S.E., Coxon, John, Pedatella, N.M., Forster, M. and Reistad, J.P. (2017) North–South asymmetries in Earth’s magnetic field: Effects on High-Latitude Geospace. Space Science Reviews, 206 (1-4), 225-257. (doi:10.1007/s11214-016-0273-0).

Carter, J.A., Milan, S.E., Coxon, John, Walach, M.-T. and Anderson, B.J. (2016) Average field-aligned current configuration parameterized by solar wind conditions. Journal of Geophysical Research: Space Physics, 121 (2), 1294-1307. (doi:10.1002/2015JA021567).

Farinas Perez, German, Cardoso, F, Sibeck, David, Gonzalez, W, Facskó, G, Coxon, John and Pembroke, A (2018) Generation mechanism for interlinked flux tubes on the magnetopause. Journal of Geophysical Research: Space Physics. (doi:10.1002/2017JA024664).

Forsyth, C., Shortt, M., Coxon, J.C., Rae, I.J., Freeman, M.P., Kalmoni, N.M.E., Jackman, C.M., Anderson, B.J., Milan, S.E. and Burrell, A.G. (2018) Seasonal and temporal variations of field-aligned currents and ground magnetic deflections during substorms. Journal of Geophysical Research: Space Physics. (doi:10.1002/2017JA025136).

Badman, Sarah, Coxon, John, Raymer, Katie and Sorba, Arianna (2017) London MIST 2016. Astronomy & Geophysics, 58 (5), 5.32-5.34. (doi:10.1093/astrogeo/atx175).

Coxon, John C., Freeman, Mervyn P., Jackman, Caitriona M., Forsyth, Colin, Rae, I. Jonathan and Fear, Robert C. (2018) Tailward propagation of magnetic energy density variations with respect to substorm onset times. Journal of Geophysical Research: Space Physics, 123 (6), 4741-4754. (doi:10.1029/2017JA025147).

Sandhu, Jasmine, Graham, Georgina, Bentley, Sarah and Coxon, John (2018) Autumn MIST 2017. Astronomy and Geophysics, 59 (2), 2.26-2.29. (doi:10.1093/astrogeo/aty083).

Milan, Stephen E., Carter, Jennifer Alyson, Sangha, Harneet, Laundal, Karl M., Østgaard, Nikolai, Tenfjord, Paul, Reistad, Jone Peter, Snekvik, Kristian, Coxon, John C., Korth, Haje and Anderson, Brian J. (2018) Timescales of dayside and nightside field-aligned current response to changes in solar wind-magnetosphere coupling. Journal of Geophysical Research: Space Physics. (doi:10.1029/2018JA025645).

Coxon, John C., Milan, Stephen E. and Anderson, Brian J. (2018) A review of Birkeland current research using AMPERE. In, Electric Currents in Geospace and Beyond. Wiley, pp. 257-278. (doi:10.1002/9781119324522.ch16).

Smith, A. W., Jackman, C. M., Frohmaier, C. M., Coxon, J. C., Slavin, J. A. and Fear, R. C. (2018) Evaluating single-spacecraft observations of planetary magnetotails with simple Monte Carlo Simulations: 1. Spatial distributions of the neutral line. Journal of Geophysical Research: Space Physics, 123 (12), 10109-10123. (doi:10.1029/2018JA025958).

Smith, A. W., Jackman, C. M., Frohmaier, C. M., Fear, R. C., Slavin, J. A. and Coxon, J. C. (2018) Evaluating single spacecraft observations of planetary magnetotails with simple Monte Carlo Simulations: 2. Magnetic flux rope signature selection effects. Journal of Geophysical Research: Space Physics, 123 (12), 10124-10138. (doi:10.1029/2018JA025959).

Coxon, John (2018) Public engagement with MIST science. Astronomy & Geophysics, 59 (6), 6.29-6.31. (doi:10.1093/astrogeo/aty276).

Forsyth, C., Watt, C. E.J., Rae, I. J., Fazakerley, A. N., Kalmoni, N. M.E., Freeman, M. P., Boakes, P. D., Nakamura, R., Dandouras, I., Kistler, L. M., Jackman, C. M., Coxon, J. C. and Carr, C. M. (2014) Increases in plasma sheet temperature with solar wind driving during substorm growth phases. Geophysical Research Letters, 41 (24), 8713-8721. (doi:10.1002/2014GL062400).

Coxon, J. C., Milan, S. E., Clausen, L. B.N., Anderson, B. J. and Korth, H. (2014) A superposed epoch analysis of the regions 1 and 2 Birkeland currents observed by AMPERE during substorms. Journal of Geophysical Research: Space Physics, 119 (12), 9834-9846. (doi:10.1002/2014JA020500).

Clausen, L. B.N., H. Baker, J. B., Ruohoniemi, J. M., Milan, S. E., Coxon, J. C., Wing, S., Ohtani, S. and Anderson, B. J. (2013) Temporal and spatial dynamics of the regions 1 and 2 Birkeland currents during substorms. Journal of Geophysical Research: Space Physics, 118 (6), 3007-3016. (doi:10.1002/jgra.50288).

Clausen, L. B.N., Milan, S. E., Baker, J. B.H., Ruohoniemi, J. M., Glassmeier, K. H., Coxon, J. C. and Anderson, B. J. (2013) On the influence of open magnetic flux on substorm intensity: Ground- and space-based observations. Journal of Geophysical Research: Space Physics, 118 (6), 2958-2969. (doi:10.1002/jgra.50308).

Sergeev, V. A., Nikolaev, A. V., Kubyshkina, M. V., Tsyganenko, N. A., Singer, H. J., Rodriguez, J. V., Angelopoulos, V., Nakamura, R., Milan, S. E., Coxon, J. C., Anderson, B. J. and Korth, H. (2019) Event study combining magnetospheric and ionospheric perspectives of the substorm current wedge modeling. Journal of Geophysical Research: Space Physics, 119 (12), 9714-9728. (doi:10.1002/2014JA020522).

Coxon, J. C., Milan, S. E., Clausen, L. B.N., Anderson, B. J. and Korth, H. (2014) The magnitudes of the regions 1 and 2 Birkeland currents observed by AMPERE and their role in solar wind-magnetosphere-ionosphere coupling. Journal of Geophysical Research: Space Physics, 119 (12), 9804-9815. (doi:10.1002/2014JA020138).

Coxon, John C., Shore, Robert M., Freeman, Mervyn P., Fear, Robert C., Browett, Stephen D., Smith, Andrew W., Whiter, Daniel K. and Anderson, Brian J. (2019) Timescales of Birkeland currents driven by the IMF. Geophysical Research Letters, 46 (14), 1-9. (doi:10.1029/2018GL081658).

Shore, R.M., Freeman, M.P., Coxon, J.C., Thomas, E.G., Gjerloev, J.W. and Olsen, N. (2019) Spatial variation in the responses of the surface external and induced magnetic field to the solar wind. Journal of Geophysical Research: Space Physics, 1-17. (doi:10.1029/2019JA026543).

Trenchi, L., Coxon, J.C., Fear, R.C., Eastwood, J.P., Dunlop, M.W., Trattner, K. J., Gershman, D.J., Graham, D.B., Khotyaintsev, Y. and Lavraud, B. (2019) Signatures of magnetic separatrices at the borders of a crater flux transfer event connected to an active x-line. Journal of Geophysical Research: Space Physics. (doi:10.1029/2018JA026126).

Fear, Robert, Coxon, John and Jackman, Caitriona (2019) The contribution of flux transfer events to Mercury's Dungey cycle. Geophysical Research Letters, 46 (24), 14239-14246. (doi:10.1029/2019GL085399).

Mooney, M. K., Forsyth, C., Rae, I. J., Chisham, G., Coxon, J. C., Marsh, M. S., Jackson, D. R., Bingham, S. and Hubert, B. (2020) Examining local time variations in the gains and losses of open magnetic flux during substorms. Journal of Geophysical Research: Space Physics, 125 (4), [e2019JA027369]. (doi:10.1029/2019JA027369).

Lockwood, Mike, McWilliams, Kathryn A., Owens, Mathew J., Barnard, Luke A., Watt, Clare E., Scott, Chris J., MacNeil, Allan R. and Coxon, John C. (2020) Semi-annual, annual and Universal Time variations in the magnetosphere and in geomagnetic activity: 2. Response to solar wind power input and relationships with solar wind dynamic pressure and magnetospheric flux transport. Journal of Space Weather and Space Climate, 10, [30]. (doi:10.1051/swsc/2020033).

Ovodenko, V. B., Klimenko, M. V., Zakharenkova, I. E., Oinats, A. V., Kotova, D. S., Nikolaev, A. V., Tyutin, I. V., Rogov, D. D., Ratovsky, K. G., Chugunin, D. V., Budnikov, P. A., Coxon, J. C., Anderson, B. J. and Chernyshov, A. A. (2020) Spatial and temporal evolution of different-scale ionospheric irregularities in central and East Siberia during the 27–28 May 2017 geomagnetic storm. Space Weather, 18 (6), [e2019SW002378]. (doi:10.1029/2019SW002378).

Lockwood, Mike, Owens, Mathew J., Barnard, Luke A., Haines, Carl, Scott, Chris J., McWilliams, Kathryn A. and Coxon, John C. (2020) Semi-annual, annual and Universal Time variations in the magnetosphere and in geomagnetic activity: 1. Geomagnetic data. Journal of Space Weather and Space Climate, 10, [23]. (doi:10.1051/swsc/2020023).

Lockwood, Mike, Owens, Mathew J., Barnard, Luke A., Watt, Clare E., Scott, Chris J., Coxon, John C. and McWilliams, Kathryn A. (2020) Semi-annual, annual and Universal Time variations in the magnetosphere and in geomagnetic activity: 3. Modelling. Journal of Space Weather and Space Climate, 10, [61]. (doi:10.1051/swsc/2020062).

Fryer, L. J., Fear, R. C., Coxon, J. C. and Gingell, I. L. (2021) Observations of closed magnetic flux embedded in the lobes during periods of northward IMF. Journal of Geophysical Research: Space Physics, 126 (6), [e2021JA029281]. (doi:10.1029/2021JA029281).

Coxon, John C., Fear, Robert C., Reidy, Jade A., Fryer, Laura Jane and Plank, James (2021) Hot Plasma in the Magnetotail Lobes Shows Characteristics Consistent With Closed Field Lines Trapped in the Lobes. Journal of Geophysical Research: Space Physics, 126 (9), [e2021JA029516]. (doi:10.1029/2021JA029516).

Contact

Telephone: +44 (0) 23 8059 2049

Email: J.Coxon@soton.ac.uk

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