Dr Mark Clilverd

Senior Scientist

Space Weather and Atmosphere Science Team

Cambridge


Contact details

email: macl@bas.ac.uk

phone: +44 (0)1223 221 541

 

British Antarctic Survey,
Natural Environment Research Council,
High Cross,
Madingley Road,
Cambridge
CB3 0ET,
United Kingdom

How to get to BAS Cambridge


Research Interests
Upper Atmosphere and Space Physics focused on the impact of energetic particle effects on the Earth's atmosphere and climate system.

 

Distinctions/Honours

Principal investigator (with C. J. Rodger) of the Antarctic-Arctic Radiation-belt (Dynamic) Deposition - VLF Atmospheric Research Konsortium (AARDDVARK).

Member of the CHemical Aeronomy in the Mesosphere and Ozone in the Stratosphere (CHAMOS) science team.

Member of the British Geological Survey Geomagnetism Advisory Group (2005-onwards).

United Kingdom national representative to the International Association of Geomagnetism and Aeronomy (IAGA) (2014 - onwards)

International Union of Radio Science (URSI) representative to the Scientific Committee on Antarctic Research, an inter-disciplinary committee of the International Council for Science. (2005-2014)

Conclusions of study [Seppälä et al., 2009] selected as a highlight in the 2010 science activities of the British Antarctic Survey and featured in their Annual Report (BAS Annual Report 2009-2010, page 7, 2010).

Conclusions of study [Gamble et al., 2008] described in the Editor's Choice section of the American Geophysical Union publication, Space Weather Quarterly. Howard J. Singer, Radio Signals From Australia Perturb Radiation Belt Electrons, Editor's Choice in Space Weather Quarterly, Volume 6, Issue 1, pg. 8, 2009.

Incorporation of research work through 2 references in the Chapter 4 of the latest WMO Scientific Assessment of Ozone Depletion: 2006 (Feb 2007).

Conclusions of study [Rodger et al., 2006] described in New Scientist magazine (issue 2565, 19 Aug. 2006) and New Scientist website.

UK representative, URSI Commission H. (2002-2005)

Papers selected by journal editors as scientific highlight of that month's issue of Geophysical Research Letters [Rodger et al., 2001; Rodger and Clilverd, 2002].

Polar Medal for services to Science in the Antarctic, presented by H.M. The Queen, 1998.

Laws prize awarded to outstanding young scientists of the British Antarctic Survey for Antarctic research, 1994.

Royal Society Post-doctoral Fellowship in Physics, undertaken at the Department of Physics, University of Otago, 1990-1991.

 

Biography

PhD: University of Sheffield 1990
BSc (Hons): University of Southampton 1984

 


Publications (up to the end of 2016)

 

Clilverd, M A, C J Rodger, M Andersson, P T Verronen, and A Seppälä, (2016), Linkages between the radiation belts, polar atmosphere and climate: electron precipitation through wave particle interactions, in Waves, particles and
storms in geospace, edited by I. Mann et al., Oxford University Press, ISBN: 9780198705246.

van de Kamp, M., A. Seppälä, M. A. Clilverd, C. J. Rodger, P. T. Verronen, and I. C. Whittaker (2016), A model providing long-term data sets of energetic electron precipitation during geomagnetic storms, J. Geophys. Res. Atmos., 121,
12,520–12,540, doi:10.1002/2015JD024212.

Kovács, T., J. M. C. Plane, W. Feng, T. Nagy, M. P. Chipperfield, P. T. Verronen, M. E. Andersson, D. A. Newnham, M. A. Clilverd, D. R. Marsh (2016), D-region ion–neutral coupled chemistry (Sodankylä Ion Chemistry, SIC) within the
Whole Atmosphere Community Climate Model (WACCM 4) – WACCM-SIC and WACCM-rSIC. Geoscientific Model Development Discussions, 9 (9). 3123-3136. 10.5194/gmd-9-3123-2016.

Hendry, A. T., C. J. Rodger, M. A. Clilverd, M. J. Engebretson, I. R. Mann, M. R. Lessard, T. Raita, and D. K. Milling (2016), Confirmation of EMIC wave-driven relativistic electron precipitation, J. Geophys. Res. Space Physics, 121,
5366–5383, doi:10.1002/2015JA022224.

Simms, L. E., M. J. Engebretson, V. Pilipenko, G. D. Reeves, and M. Clilverd (2016), Empirical predictive models of daily relativistic electron flux at geostationary orbit: Multiple regression analysis, J. Geophys. Res. Space
Physics, 121, 3181–3197, doi:10.1002/2016JA022414.

Rodger, C. J., K. Cresswell-Moorcock, and M. A. Clilverd (2016), Nature's Grand Experiment: Linkage between magnetospheric convection and the radiation belts, J. Geophys. Res. Space Physics, 121, 171–189, doi:10.1002/2015JA021537.

Rodger, C. J., A. T. Hendry, M. A. Clilverd, C. A. Kletzing, J. B. Brundell, and G. D. Reeves (2015), High-resolution in situ observations of electron precipitation-causing EMIC waves, Geophys. Res. Lett., 42, 9633–9641, doi:10.1002/2015GL066581.

Seppälä, A., M. A. Clilverd, M. J. Beharrell, C. J. Rodger, P. T. Verronen, M. E. Andersson, and D. A. Newnham (2015), Substorm-induced energetic electron precipitation: Impact on atmospheric chemistry, Geophys. Res. Lett., 42, 8172–8176, doi:10.1002/2015GL065523.

Hardman, R., M. A. Clilverd, C. J. Rodger, J. B. Brundell, R. Duthie, R. H. Holzworth, I. R. Mann, D. K. Milling, and E. Macusova (2015), A case study of electron precipitation fluxes due to plasmaspheric hiss, J. Geophys. Res. Space Physics, 120, 6736–6748, doi:10.1002/2015JA021429.

McCrea et al. (2015), The science case for the EISCAT_3D radar, Progress in Earth and Planetary Science (2015) 2:21, doi:10.1186/s40645-015-0051-8

Blum, L. W., A. Halford, R. Millan, J. W. Bonnell, J. Goldstein, M. Usanova, M. Engebretson, M. Ohnsted, G. Reeves, H. Singer, et al. (2015), Observations of coincident EMIC wave activity and duskside energetic electron precipitation on 18–19 January 2013, Geophys. Res. Lett., 42, 5727–5735, doi:10.1002/2015GL065245.

Clilverd, M. A., R. Duthie, R. Hardman, A. T. Hendry, C. J. Rodger, T. Raita, M. Engebretson, M. R. Lessard, D. Danskin, and D. K. Milling (2015), Electron precipitation from EMIC waves: A case study from 31 May 2013. J. Geophys. Res. Space Physics, 120, 3618–3631. doi: 10.1002/2015JA021090.

Cresswell-Moorcock, K., C. J. Rodger, M. A. Clilverd, and D. K. Milling (2015), Techniques to determine the quiet day curve for a long period of subionospheric VLF observations, Radio Sci., 50, 453–468. doi:10.1002/2015RS005652.

Miyoshi, Y., S. Oyama, S. Saito, S. Kurita, H. Fujiwara, R. Kataoka, Y. Ebihara, C. Kletzing, G. Reeves, O. Santolik, M. Clilverd, C. J. Rodger, E. Turunen, and F. Tsuchiya (2015), Energetic electron precipitation associated with pulsating aurora: EISCAT and Van Allen Probe observations. J. Geophys. Res. Space Physics, 120, 2754–2766, doi: 10.1002/2014JA020690.

Beharrell, M. J., F. Honary, C. J. Rodger, and M. A. Clilverd (2015), Substorm-induced energetic electron precipitation: Morphology and prediction. J. Geophys. Res. Space Physics, 120, 2993–3008, doi: 10.1002/2014JA020632.

Simms, L. E., M. J. Engebretson, A. J. Smith, M. Clilverd, V. Pilipenko, and G. D. Reeves (2015), Analysis of the effectiveness of ground-based VLF wave observations for predicting or nowcasting relativistic electron flux at geostationary orbit. J. Geophys. Res. Space Physics, 120, 2052–2060. doi: 10.1002/2014JA020337.

Neal, J. J., C. J. Rodger, M. A. Clilverd, N. R. Thomson, T. Raita, and T. Ulich (2015), Long-term determination of energetic electron precipitation into the atmosphere from AARDDVARK subionospheric VLF observations, J. Geophys. Res. Space Physics,120,2194–2211, doi:10.1002/2014JA020689.
 

Menk, F., Z. Kale, M. Sciffer, P. Robinson, C. Waters, R. Grew, M. Clilverd, and I. Mann, Remote sensing the plasmasphere, plasmapause, plumes and other features using ground-based magnetometers. Journal of Space Weather and Space Climate, 4, A34. 16, pp. 10.1051/swsc/2014030, 2014.


Whittaker, I. C., M. A. Clilverd, and C. J. Rodger, Characteristics of precipitating energetic electron fluxes relative to the plasmapause, J. Geophys. Res., 119, 8784–8800, doi:10.1002/2014JA020446, 2014.


Andersson, M., P. T. Verronen, C. J. Rodger, M. A. Clilverd, and A. Seppälä, Missing driver in the Sun–Earth connection from energetic electron precipitation impacts mesospheric ozone, Nature Comm., 5, doi:10.1038/ncomms6197, 2014.


Simms, L. E., V. A. Pilipenko, M. J. Engebretson, G. D. Reeves, A. J. Smith, M. A. Clilverd, Prediction of relativistic electron flux at geostationary orbit following storms: Multiple regression analysis, J. Geophys. Res., 119 (9), 7297-7318. 10.1002/2014JA019955, 2014.
Thomson, N. R., M. A. Clilverd, and C. J. Rodger, Low Latitude Ionospheric D-region Dependence on Solar Zenith Angle, J. Geophys. Res., 119, 6865–6875, doi:10.1002/2014JA020299, 2014.


Whittaker, I. C., C. J. Rodger, M. A. Clilverd and J. A. Sauvaud, The effects and correction of the geometric factor for the POES/MEPED electron flux instrument using a multi-satellite comparison, J. Geophys. Res., 119, 6386–6404, doi:10.1002/2014JA020021, 2014.


Rodger, C. J., M. A. Clilverd, W. Li, M. P. McCarthy, Y. Omura, and C. E. Weaver, Drivers, Detection, and Impacts of Precipitation from the Radiation Belts, Radio Sci. Bulletin, No. 349, 59-67, June 2014.


Simon Wedlund, M., M. A. Clilverd, C. J. Rodger, K. Cresswell-Moorcock, N. Cobbett, P. Breen, D. Danskin, E. Spanswick, and J. V. Rodriguez, A statistical approach to determining energetic outer radiation-belt electron precipitation fluxes, J. Geophys. Res., 119, 3961–3978, doi:10.1002/2013JA019715, 2014.


Andersson, M., P. T. Verronen, C. J. Rodger, M. A. Clilverd, and S. Wang, Longitudinal hot-spots in the mesospheric OH variations due to energetic electron precipitation, Atmos. Chem. Phys, 4, 1095–1105, doi:10.5194/acp-14-1095-2014, 2014.


Seppala, A., M. A. Clilverd, Energetic particle forcing of the Northern Hemisphere winter stratosphere: comparison to solar irradiance forcing, Frontiers in Physics, 2, 25, 6, pp. 10.3389/fphy.2014.00025, 2014.


Denton, M. H., M. J. Kosch, J. E., Borovsky, M. A.; Clilverd, R. H. W. Friedel, T. Ulich, First optical observations of energetic electron precipitation at 4278 Å caused by a powerful VLF transmitter, Geophys. Res. Lett., 41 (7), 2237-2242. 10.1002/2014GL059553, 2014.
 

Rodger, C. J., A. J. Kavanagh, M. A. Clilverd, and S. Marple, Comparison between POES energetic electron precipitation observations and riometer absorptions: Implications for determining true precipitation fluxes, J. Geophys. Res., 118, doi:10.1002/2013JA019439, 2013.
 

Newnham, D. A., P. J. Espy, M. A. Clilverd, C. J. Rodger, A. Seppälä, D. J. Maxfield, P. Hartogh, K. Holmén, and R. B. Horne, Observations of nitric oxide in the Antarctic middle atmosphere during recurrent geomagnetic storms, J. Geophys. Res., 118, doi:10.1002/2013JA019056, 2013.
 

Whittaker, I. C., R. J. Gamble, C. J. Rodger, M. A. Clilverd and J. A. Sauvaud, Determining the spectra of radiation belt electron losses: Determining the spectra of radiation belt electron losses: Fitting DEMETER Instrument for Detecting Particle observations for typical and storm times, J. Geophys. Res., 118, doi:10.1002/2013JA019228, 2013.
 

Millan, R. M., M. P. McCarthy, J. G. Sample, D. M. Smith, L. D. Thompson, D. G. McGaw, L. A. Woodger, J. G. Hewitt, M. D. Comess, K. B. Yando, A. X. Liang, B. A. Anderson, N. R. Knezek, W. Z. Rexroad, J. M. Scheiman, G. S. Bowers, A. J. Halford, A. B. Collier, M. A. Clilverd, R. P. Lin, M. K. Hudson, The Balloon Array for RBSP Relativistic Electron Losses (BARREL), Space Science Reviews, Vol. 179 (1-4), 503-530, Nov 2013.
 

Clilverd, M. A., N. Cobbett, C. J. Rodger, J. B. Brundell, M. Denton, D. Hartley, J. Rodriguez, D. Danskin, T. Raita, and E. L. Spanswick, Energetic electron precipitation characteristics observed from Antarctica during a flux dropout event, J. Geophys. Res., 118, doi:10.1002/2013JA019067, 2013.
 

Cresswell-Moorcock, K., C. J. Rodger, A. Kero, A. B. Collier, M. A. Clilverd, I. Häggström, and T. Pitkänen, A reexamination of latitudinal limits of substorm-produced energetic electron precipitation, J. Geophys. Res., 118, doi:10.1002/jgra.50598, 2013.
 

Verronen, P. T., M. Andersson, C. J. Rodger, M. A. Clilverd, S. Wang, and E. Turunen, Comparison of modeled and observed effects of radiation belt electron precipitation on mesospheric hydroxyl and ozone, J. Geophys. Res., 118, doi:10.1002/jgrd.50845, 2013.
 

Lichtenberger, J., M. A. Clilverd, B. Heilig, M. Vellante, J. Manninen, C. J. Rodger, A. B. Collier, A. M. Jorgensen, J. Reda, R. H. Holzworth, R. Friedel, and M. Simon- Wedlund, The plasmasphere during a space weather event: First results from the PLASMON, J. Space Weather Space Climate, 3 (A3), http://dx.doi.org/10.1051/swsc/2013045, 2013.
 

Bertoni, F. C. P., J.-P. Raulin, H. R. Gavilán, P. Kaufmann, R. Rodriguez, M. Clilverd, J. S. Cardenas, and G. Fernandez (2013), Lower ionosphere monitoring by the South America VLF Network (SAVNET): C region occurrence and atmospheric temperature variability, J. Geophys. Res. Space Physics, 118, 6686–6693, doi:10.1002/jgra.50559.
 

Seppälä, A., H. Lu, M. A. Clilverd, and C. J. Rodger, Geomagnetic activity signatures in wintertime stratosphere-troposphere temperature, wind, and wave response, J. Geophys. Res., 118, doi:10.1002/jgrd.50236, 2013.
 

Carson, B. R., C. J. Rodger, and M. A. Clilverd, POES Satellite Observations of EMIC-wave driven Relativistic Electron Precipitation during 1998-2010, J.. Geophys. Res., 118, 1–12, doi:10.1029/2012JA017998, 2013.
 

Hendry, A. T., C. J. Rodger, M. A. Clilverd, N. R. Thomson, S. K. Morley, T. Raita, Rapid radiation belt losses occurring during high speed solar wind stream driven storms: importance of energetic electron precipitation, in Dynamics of the Earth's Radiation Belts and Inner Magnetosphere, Geophys. Monogr. Ser., vol. 199, edited by D. Summers et al., 213–223, AGU, Washington, D. C., doi:10.1029/2012GM001299, 2012.

Delport, B., A. B. Collier, J. Lichtenberger, C. J. Rodger, M. Parrot, M. A. Clilverd, and R. H. W. Friedel, Simultaneous observation of chorus and hiss near the plasmapause, J. Geophys. Res., 117, A12218, doi:10.1029/2012JA017609, 2012.

Clilverd, M. A., C. J. Rodger, D. Danskin, M. E. Usanova, T. Raita, Th. Ulich, and E. L. Spanswick, Energetic Particle injection, acceleration, and loss during the geomagnetic disturbances which upset Galaxy 15, J. Geophys. Res., 117, A12213, doi:10.1029/2012JA018175, 2012.

Thomson, N. R., C. J. Rodger, and M. A. Clilverd, Tropical Daytime Lower D-region Dependence on Sunspot Number, J. Geophys. Res., 117(A10), A10306, doi:10.1029/2012JA018077, 2012.
Andersson, M., P. T. Verronen, S. Wang, C. J. Rodger, M. A. Clilverd, and B. R. Carson, Precipitating radiation belt electrons and the production of mesospheric hydroxyl during 2004–2009, J. Geophys. Res., 117(D9), D09304, doi:10.1029/2011JD01724, 2012.

Rodger, C. J., M. A. Clilverd, A. J. Kavanagh, C. E. J. Watt, P. T. Verronen, and T. Raita, Contrasting the responses of three different ground-based instruments to energetic electron precipitation, Radio Sci., 47(2), RS2021, doi:10.1029/2011RS004971, 2012.

Menk, F. W., S. T. Ables, R. S. Grew, M. A. Clilverd, and B. R. Sandel (2012), The annual and longitudinal variations in plasmaspheric ion density, J. Geophys. Res., 117, A03215, doi:10.1029/2011JA017071.

Clilverd, M. A., C. J. Rodger, I. J. Rae, J. B. Brundell, N. R. Thomson, N. Cobbett, P. T. Verronen, and F. W. Menk, Combined THEMIS and ground-based observations of a pair of substorm associated electron precipitation events, J. Geophys. Res., 117, A02313, doi:10.1029/2011ja016933, 2012.

Lu, H., Y. Li, M. A. Clilverd, and M. J. Jarvis (2012), Trend and abrupt changes in long-term geomagnetic indices, J. Geophys. Res., 117, A05318, doi:10.1029/2011JA017422.

Newnham, D. A., P. J. Espy, M. A. Clilverd, C. J. Rodger, A. Seppälä, D. J. Maxfield, P. Hartogh, K. Holmén, and R. B. Horne, Direct observations of nitric oxide produced by energetic electron precipitation in the Antarctic middle atmosphere, Geophys. Res. Lett., 38(20), L20104, doi:10.1029/2011GL049199, 2011.

Thomson, N. R., C. J. Rodger, and M. A. Clilverd, Daytime D-region Parameters from Long Path VLF Phase and Amplitude, J. Geophys. Res., 116, A11305, doi:10.1029/2011JA016910, 2011.

Li, Y., H. Lu, M. J. Jarvis, M. A. Clilverd, and B. Bates (2011), Nonlinear and nonstationary influences of geomagnetic activity on the winter North Atlantic Oscillation, J. Geophys. Res., 116, D16109, doi:10.1029/2011JD015822.

Verronen, P. T., C. J. Rodger, M. A. Clilverd, and S. Wang, First evidence of mesospheric hydroxyl response to electron precipitation from the radiation belts, J. Geophys. Res., 116, D07307, doi:10.1029/2010JD014965, 2011.

Thomson, N. R., M. A. Clilverd, and C. J. Rodger, Daytime Mid-Latitude D-region Parameters at Solar Minimum from Short Path VLF Phase and Amplitude, J. Geophys. Res., 116, A03310, doi:10.1029/2010JA016248, 2011.

Collier, A. B., J. Lichtenberger, M. A. Clilverd, C. J. Rodger, and P. Steinbach, Source region for whistlers detected at Rothera, Antarctica, J. Geophys. Res., 116, A03219, doi:10.1029/2010JA016197, 2011.

Baumgaertner, A. J. G., Seppälä, A., Jöckel, P., and Clilverd, M. A.: Geomagnetic activity related NOx enhancements and polar surface air temperature variability in a chemistry climate model: modulation of the NAM index, Atmos. Chem. Phys., 11, 4521-4531, doi:10.5194/acp-11-4521-2011, 2011.

Rodger, C. J., M. A. Clilverd, A. Seppälä, N. R. Thomson, R. J. Gamble, M. Parrot, J.-A. Sauvaud, and T. Ulich, Radiation belt electron precipitation due to geomagnetic storms: Significance to middle atmosphere ozone chemistry, J. Geophys. Res., 115, A11320, doi:10.1029/2010JA015599, 2010

Clilverd, M. A., C. J. Rodger, T. Moffat-Griffin, E. Spanswick, P. Breen, F. W. Menk, R. S. Grew, K. Hayashi, and I. R. Mann, Energetic outer radiation belt electron precipitation during recurrent solar activity, J. Geophys. Res., 115, A08323, doi:10.1029/2009JA015204, 2010

Clilverd, M. A., C. J. Rodger, S. Dietrich, T. Raita, T. Ulich, E. Clarke, A. W. P. Thomson, and A. J. Kavanagh, High-latitude geomagnetically induced current events observed on very low frequency radio wave receiver systems, Radio Sci., 45, RS2006, doi:10.1029/2009RS004215, 2010

Clilverd, M. A., C. J. Rodger, R. J. Gamble, T. Ulich, T. Raita, A.
Seppälä, J. C. Green, N. R. Thomson, J.-A. Sauvaud, and M. Parrot, Ground-based estimates of outer radiation belt energetic electron precipitation fluxes into the atmosphere, J. Geophys. Res., 115, A12304, doi:10.1029/2010JA015638, 2010

Rodger, C. J., B. R. Carson, S. A. Cummer, R. J. Gamble, M. A. Clilverd, J. C. Green, J.-A. Sauvaud, M. Parrot, and J.-J. Berthelier, Contrasting the efficiency of radiation belt losses caused by ducted and nonducted whistler-mode waves from ground-based transmitters, J. Geophys. Res., 115, A12208, doi:10.1029/2010JA015880, 2010

Rodger, C. J., M. A. Clilverd, N. R. Thomson, R. J. Gamble, A.
Seppälä, E. Turunen, N. P. Meredith, M. Parrot, J.-A. Sauvaud, and J.-J. Berthelier,Correction to "Radiation belt electron precipitation into the atmosphere: Recovery from a geomagnetic storm", J. Geophys. Res., 115, A09324, doi:10.1029/2010JA016038, 2010

Rodger, C J, M A Clilverd, J Green, and M-M Lam, Use of POES SEM-2 observations to examine radiation belt dynamics and energetic electron precipitation in to the atmosphere, J. Geophys. Res., 115, A04202, doi:10.1029/2008JA014023, 2010.

Ferencz, C., J. Lichtenberger, D. Hamar, O. E. Ferencz, P. Steinbach, B. Székely, M. Parrot, F. Lefeuvre, J.-J. Berthelier, and M. Clilverd, An unusual VLF signature structure recorded by the DEMETER satellite, J. Geophys. Res., 115, A02210, doi:10.1029/2009JA014636, 2010.

Seppälä, A., C. E. Randall, M. A. Clilverd, E. Rozanov, and C. J. Rodger, Geomagnetic activity and polar surface level air temperature variability, J. Geophys. Res., 114, A10312, doi:10.1029/2008JA014029, 2009.

Gamble, R. J., C. J. Rodger, M. A. Clilverd, J. A. Sauvaud, N. R. Thomson, S. L. Stewart, R. J. McCormick, M. Parrot, and J.-J. Berthelier, Correction to “Radiation belt electron precipitation by man-made VLF transmissions”, J. Geophys. Res., 114, A05205, doi:10.1029/2009JA014304, 2009.

Clilverd, M. A., A. Seppälä, C. J. Rodger, M. G. Mlynczak, and J. U. Kozyra, Additional stratospheric NOx production by relativistic electron precipitation during the 2004 spring NOx descent event, J. Geophys. Res., 114, A04305, doi:10.1029/2008JA013472, 2009.

Turunen, E., P. T. Verronen, A. Seppälä, C. J. Rodger, M. A. Clilverd, J. Tamminen, C. F. Enell and Th. Ulich, Impact of different precipitation energies on NOx generation during geomagnetic storms, J. Atmos Sol.-Terr. Phys., 71, pp. 1176-1189, doi:10.1016/j.jastp.2008.07.005, 2009.

Clilverd, M. A., C. J. Rodger, N. R. Thomson, J. B. Brundell, Th. Ulich, J. Lichtenberger, N. Cobbett, A. B. Collier, F. W. Menk, A. Seppälä, P. T. Verronen, and E. Turunen, Remote sensing space weather events: the AARDDVARK network, Space Weather, 7, S04001, doi: doi:10.1029/2008SW000412, 2009.

Rodger, C. J., P. T. Verronen, M. A. Clilverd, A. Seppälä, and E. Turunen, Significance of the Carrington Event Solar Proton Event to the neutral atmosphere, J. Geophys. Res., 113, D23302, doi:10.1029/2008JD010702, 2008.

Seppälä, A., M. A. Clilverd, C. J. Rodger, P. T. Verronen, and E. Turunen, The effects of hard spectra solar proton events on the middle atmosphere, J. Geophys. Res., 113, A11311, doi:10.1029/2008JA013517, 2008.

Clilverd, M. A., C. J. Rodger, J. B. Brundell, N. Cobbett, J. Bähr, T. Moffat-Griffin, A. J. Kavanagh, A. Seppälä, N. R. Thomson, R. H. W. Friedel, and F. W. Menk, Energetic electron precipitation during sub-storm injection events: high latitude fluxes and an unexpected mid-latitude signature, J. Geophys. Res., 113, A10311, doi: 10.1029/ 2008JA013220, 2008.

Gamble, R. J., C. J. Rodger, M. A. Clilverd, J. A. Sauvaud, N. R. Thomson, S. L. Stewart, R. J. McCormick, M. Parrot, and J.-J. Berthelier, Radiation belt electron precipitation by manmade VLF transmissions, J. Geophys. Res., 113, A10211, doi: 10.1029/2008JA013369, 2008.

Rodger, C. J., T. Raita, M. A. Clilverd, A. Seppälä, S. Dietrich, N. R. Thomson, and Th. Ulich, Observations of relativistic electron precipitation from the radiation belts driven by EMIC Waves, Geophys. Res. Lett., 35, L16106, doi:10.1029/2008GL034804, 2008.

Dowden, R. L., R. H. Holzworth, C. J. Rodger, J. Lichtenberger, N. R. Thomson, A. R. Jacobson, E. Lay, J. B. Brundell, T. J. Lyons, S. O'Keefe, Z. Kawasaki, C. Price, V. Prior, P. Ortéga, J. Weinman, Y. Mikhailov, R. Woodman, X. Qie, G. Burns, A. Collier, O. Pinto Junior, R. Diaz, C. Adamo, E. R. Williams, S. Kumar, G. B. Raga, J. M. Rosado, E. E. Avila, M. A. Clilverd, T. Ulich, P. Gorham, T. J. G. Shanahan, T. Osipowicz, G. Cook, and Y. Zhao, World-Wide Lightning Location Using VLF Propagation in the Earth-Ionosphere Waveguide, IEEE Antennas and Propagation Mag., 50(5), 40-60, 2008.

Rodger, C. J., and M. A. Clilverd, Magnetospheric physics: Hiss from the chorus, Nature, 452 (7183), 41-42, doi:10.1038/452041a, 2008.

Rodger, C. J., A. Seppälä, and M. A. Clilverd, Significance of Transient Luminous Events to neutral chemistry: experimental measurements, Geophys. Res. Lett., 35, L07803, doi:10.1029/2008GL033221, 2008.

Clilverd, M. A., C. J. Rodger, R. J. Gamble, N. P. Meredith, M. Parrot, J.-J. Berthelier, and N. R. Thomson, Ground based transmitter signals observed from space: ducted or nonducted?, J. Geophys. Res., 113, A04211, doi:10.1029/2007JA012602, 2008.

Lu H., M. A. Clilverd, A. Seppälä, and L. L. Hood, Geomagnetic perturbations on stratospheric circulation in late winter and spring, J. Geophys. Res., 113, D16106, doi:10.1029/2007JD008915, 2008.

Grew R. S., F. W. Menk, M. A. Clilverd, B. R. Sandel (2007), Mass and electron densities in the inner magnetosphere during a prolonged disturbed interval, Geophys. Res. Lett., 34, L02108, doi:10.1029/2006GL028254.

Seppälä A., P. T. Verronen, M. A. Clilverd, C. E. Randall, J. Tamminen, V. Sofieva, L. Backman, E. Kyrölä (2007), Arctic and Antarctic polar winter NOx and energetic particle precipitation in 2002-2006, Geophys. Res. Lett., 34, L12810, doi:10.1029/2007GL029733.

Rodger, C. J., M. A. Clilverd (2007), Comment on "Preseismic Lithosphere-Atmosphere-Ionosphere Coupling", Eos Trans. AGU, 88(23), 248, doi:10.1029/2007EO230008.

Rodger C. J., M. A. Clilverd, D. Nunn, P. T. Verronen, J. Bortnik, E. Turunen (2007), Storm time, short-lived bursts of relativistic electron precipitation detected by subionospheric radio wave propagation, J. Geophys. Res., 112, A07301, doi:10.1029/2007JA012347.

Thomson N. R., M. A. Clilverd, W. M. McRae (2007), Nighttime ionospheric D region parameters from VLF phase and amplitude, J. Geophys. Res., 112, A07304, doi:10.1029/2007JA012271.

Clilverd M. A., C. J. Rodger, T. Moffat-Griffin, P. T. Verronen (2007), Improved dynamic geomagnetic rigidity cutoff modeling: Testing predictive accuracy, J. Geophys. Res., 112, A08302, doi:10.1029/2007JA012410.

Clilverd M. A., A. Seppälä, C. J. Rodger, N. R. Thomson, J. Lichtenberger, P. Steinbach (2007), Temporal variability of the descent of high-altitude NOx inferred from ionospheric data, J. Geophys. Res., 112, A09307, doi:10.1029/2006JA012085.

Rodger C. J., M. A. Clilverd, N. R. Thomson, R. J. Gamble, A. Seppälä, E. Turunen, N. P. Meredith, M. Parrot, J.-A. Sauvaud, J.-J. Berthelier (2007), Radiation belt electron precipitation into the atmosphere: Recovery from a geomagnetic storm, J. Geophys. Res., 112, A11307, doi:10.1029/2007JA012383.

Verronen, P. T., C. J. Rodger, H. M. Pickett, M. A. Clilverd, and E. Turunen, Latitudinal extent of the January 2005 solar proton event in the Northern Hemisphere from satellite observations of hydroxyl, Annales Geophys., 25, 2203-2215, 2007.

Clilverd M. A., N. P. Meredith, R. B. Horne, S. A. Glauert, R. R. Anderson, N. R. Thomson, F. W. Menk, B. R. Sandel (2007), Longitudinal and seasonal variations in plasmaspheric electron density: Implications for electron precipitation, J. Geophys. Res., 112, A11210, doi:10.1029/2007JA012416.

Clilverd M. A., C. J. Rodger, R. M. Millan, J. G. Sample, M. Kokorowski, M. P. McCarthy, T. Ulich, T. Raita, A. J. Kavanagh, E. Spanswick (2007), Energetic particle precipitation into the middle atmosphere triggered by a coronal mass ejection, J. Geophys. Res., 112, A12206, doi:10.1029/2007JA012395.

Seppälä A., M. A. Clilverd, C. J. Rodger (2007), NOx enhancements in the middle atmosphere during 2003-2004 polar winter: Relative significance of solar proton events and the aurora as a source, J. Geophys. Res., 112, D23303, doi:10.1029/2006JD008326.

Rodger, C. J., C. F. Enell, E. Turunen, M. A. Clilverd, N. R. Thomson, and P. T. Verronen, Lightning-driven inner radiation belt energy deposition into the atmosphere: Implications for ionisation-levels and neutral chemistry, Annales Geophys., 25, 1745-1757, 2007.

Clilverd, M. A., Clarke, E., Ulich, Th., Rishbeth, H., Jarvis, M. J., Predicting solar cycle 24 and beyond, SPACE WEATHER-THE INTERNATIONAL JOURNAL OF RESEARCH AND APPLICATIONS, 2006, 4, S09005, ISI:000241204300001.

Clilverd, M. A., Seppala, A., Rodger, C. J., Verronen, P. T., Thomson, N. R., Ionospheric evidence of thermosphere-to-stratosphere descent of polar NOX, GEOPHYSICAL RESEARCH LETTERS, 2006, 33, L19811, ISI:000241118500005.

Meredith, N. P., Horne, R. B., Clilverd, M. A., Horsfall, D., Thorne, R. M., Anderson, R. R., Origins of plasmaspheric hiss, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2006, 111, A09217, ISI:000240949200003.

Rodger, C. J., Clilverd, M. A., Ulich, Th., Verronen, P. T., Turunen, E., Thomson, N. R., The atmospheric implications of radiation belt remediation, ANNALES GEOPHYSICAE, 2006, 24, ISI:000240367200022.

Menk, F. W., Clilverd, M. A., Yearby, K. H., Milinevski, G., Thomson, N. R., Rose, M. C., ULF Doppler oscillations of L=2.5 flux tubes, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2006, 111, A07205, ISI:000239491500001.

Rodger, CJ, Clilverd, MA, Verronen, PT, Ulich, T, Jarvis, MJ, Turunen, E, Dynamic geomagnetic rigidity cutoff variations during a solar proton event, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2006, 111, A04222, ISI:000237413600005.

Seppala, A, Verronen, PT, Sofieva, VF, Tamminen, J, Kyrola, E, Rodger, CJ, Clilverd, MA, Destruction of the tertiary ozone maximum during a solar proton event, GEOPHYSICAL RESEARCH LETTERS, 2006, 33, L07804, ISI:000236878400006.

Clilverd, MA, Seppala, A, Rodger, CJ, Thomson, NR, Verronen, PT, Turunen, E, Ulich, T, Lichtenberger, J, Steinbach, P, Modeling polar ionospheric effects during the October-November 2003 solar proton events, RADIO SCIENCE, 2006, 41, RS2001, ISI:000236335500001.

Clilverd, MA, Rodger, CJ, Ulich, T, The importance of atmospheric precipitation in storm-time relativistic electron flux drop outs, GEOPHYSICAL RESEARCH LETTERS, 2006, 33, L01102, ISI:000234994700004.

Rodger, CJ, Clilverd, MA, Thomson, NR, Nunn, D, Lichtenberger, J, Lightning driven inner radiation belt energy deposition into the atmosphere: regional and global estimates, ANNALES GEOPHYSICAE, 2005, 23, ISI:000234751800003.

Rose, MC, Clilverd, MA, Jarvis, MJ, Rodwell, S, Polar mesosphere summer echo detection using a dynasonde, RADIO SCIENCE,2005, 40, RS6003, ISI:000233589100004.

Clilverd, MA, Rodger, CJ, Ulich, T, Seppala, A, Turunen, E, Botman, A, Thomson, NR, Modeling a large solar proton event in the southern polar atmosphere, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2005, 110, A09307, ISI:000232112500004.

Verronen, PT, Seppala, A, Clilverd, MA, Rodger, CJ, Kyrola, E, Enell, CF, Ulich, T, Turunen, E, Diurnal variation of ozone depletion during the October-November 2003 solar proton events, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2005, 110, A09S32, ISI:000230921400001.

Clilverd, MA, Clarke, E, Ulich, T, Linthe, J, Rishbeth, H, Reconstructing the long-term aa index, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2005, 110, A07205, ISI:000230483100002.

Thomson, NR, Rodger, CJ, Clilverd, MA, Large solar flares and their ionospheric D region enhancements, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2005, 110, A06306, ISI:000229993600001.

Jarvis, MJ, Clilverd, MA, Rose, MC, Rodwell, S, Polar mesosphere summer echoes (PMSE) at Halley (76 degrees S, 27 degrees W), Antarctica, GEOPHYSICAL RESEARCH LETTERS, 2005, 32, L06816, ISI:000228364500001.

Clilverd, MA, Rodger, CJ, Nunn, D, Radiation belt electron precipitation fluxes associated with lightning, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2004, 109, A12208, ISI:000225880700009.

Rodger, CJ, Nunn, D, Clilverd, MA, Investigating radiation belt losses though numerical modelling of precipitating fluxes, ANNALES GEOPHYSICAE, 2004, 22, ISI:000225643100026.

Jones, GOL, Clilverd, MA, Espy, PJ, Chew, S, Fritts, DC, Riggin, DM, An alternative explanation of PMSE-like scatter in MF radar data, ANNALES GEOPHYSICAE, 2004, 22, ISI:000224483900006.

Rodger, CJ, McCormick, RJ, Clilverd, MA, Testing the importance of precipitation loss mechanisms in the inner radiation belt, GEOPHYSICAL RESEARCH LETTERS, 2004, 31,L10803, ISI:000221909900002.

Menk, FW, Mann, IR, Smith, AJ, Waters, CL, Clilverd, MA, Milling, DK, Monitoring the plasmapause using geomagnetic field line resonances, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2004, 109, A04216, ISI:000221087700001.

Nunn, D, Clilverd, MA, Rodger, CJ, Thomson, NR, The impact of PMSE and NLC particles on VLF propagation, ANNALES GEOPHYSICAE, 2004, 22, ISI:000221114000012.

Clilverd, M, Clarke, E, Clark, T, Rishbeth, H, Ulich, T, ... and a reply, ASTRONOMY & GEOPHYSICS, 2004, 45, ISI:000220736300010.

Chu, XZ, Nott, GJ, Espy, PJ, Gardner, CS, Diettrich, JC, Clilverd, MA, Jarvis, MJ, Lidar observations of polar mesospheric clouds at Rothera, Antarctica (67.5 degrees S, 68.0 degrees W), GEOPHYSICAL RESEARCH LETTERS, 2004, 31, L02114, ISI:000188866100001.

Rodger, CJ, Clilverd, MA, McCormick, RJ, Significance of lightning-generated whistlers to inner radiation belt electron lifetimes, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2003, 108 1462, ISI:000187898400003.

Clilverd, MA, Ulich, T, Jarvis, MJ, Residual solar cycle influence on trends in ionospheric F2-layer peak height, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2003, 108, 1450, ISI:000187866400003.

Clilverd, MA, Menk, FW, Milinevski, G, Sandel, BR, Goldstein, J, Reinisch, BW, Wilford, CR, Rose, MC, Thomson, NR, Yearby, KH, Bailey, GJ, Mann, IR, Carpenter, DL, In situ and ground-based intercalibration measurements of plasma density at L=2.5, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2003, 108, 1365, ISI:000186090700001.

Clilverd, MA, Clarke, E, Rishbeth, H, Clark, TDG, Ulich, T, Solar activity levels in 2100, ASTRONOMY & GEOPHYSICS, 2003, 44, ISI:000185445500016.

Dent, ZC, Mann, IR, Menk, FW, Goldstein, J, Wilford, CR, Clilverd, MA, Ozeke, LG, A coordinated ground-based and IMAGE satellite study of quiet-time plasmaspheric density profiles, GEOPHYSICAL RESEARCH LETTERS, 2003, 30, 1600, ISI:000183742500001.

Clilverd, MA, Clark, TDG, Clarke, E, Rishbeth, H, Ulich, T, The causes of long-term change in the aa index,JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2002, 107, 1441, ISI:000181185400001.

Rodger, CJ, Clilverd, MA, Inner radiation belt electron lifetimes due to whistler-induced electron precipitation (WEP) driven losses, GEOPHYSICAL RESEARCH LETTERS,2002, 29, 1924, ISI:000180603500030.

Rodger, CJ, Clilverd, MA, Dowden, RL, D region reflection height modification by whistler-induced electron precipitation, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2002, 107, 1145, ISI:000178982500007.

Clilverd, MA, Nunn, D, Lev-Tov, SJ, Inan, US, Dowden, RL, Rodger, CJ, Smith, AJ, Determining the size of lightning-induced electron precipitation patches, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2002, 107, 1168, ISI:000179009600023.

Jarvis, MJ, Clilverd, MA, Ulich, T, Methodological influences on F-region peak height trend analyses, PHYSICS AND CHEMISTRY OF THE EARTH, 2002, 27, ISI:000177044100024.

Clilverd, MA, Rodger, CJ, Thomson, NR, Yearby, KH, Investigating the possible association between thunderclouds and plasmaspheric ducts, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2001, 106, ISI:000173728500076

Thomson, NR, Clilverd, MA, Solar flare induced ionospheric D-region enhancements from VLF amplitude observations, JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 2001, 63, ISI:000171669900005

Watkins, NW, Bharmal, NA, Clilverd, MA, Smith, AJ, Comparison of VLF sferics intensities at Halley, Antarctica, with tropical lightning and temperature, RADIO SCIENCE, 2001, 36, ISI:000171570900018

Clilverd, MA, Rodger, CJ, Thomson, NR, Lichtenberger, J, Steinbach, P, Cannon, P, Angling, MJ, Total solar eclipse effects on VLF signals: Observations and modeling, RADIO SCIENCE, 2001, 36, ISI:000170101600023

Watkins, NW, Clilverd, MA, Smith, AJ, Rodger, CJ, Bharmal, NA, Yearby, KH, Lightning atmospherics count rates observed at Halley, Antarctica, JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 2001, 63, ISI:000169651800003

Dowden, R, Rodger, C, Brundell, J, Clilverd, M, Decay of whistler-induced electron precipitation and cloud-ionosphere electrical discharge Trimpis: Observations and analysis, RADIO SCIENCE, 2001, 36, ISI:000166584200013

Smith, AJ, Grieve, MB, Clilverd, MA, Rodger, CJ, A quantitative estimate of the ducted whistler power within the outer plasmasphere, JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 2001, 63, ISI:000166551100007

Rodger, CJ, Cho, MG, Clilverd, MA, Rycroft, MJ, Lower ionospheric modification by lightning-EMP: Simulation of the night ionosphere over the United States, GEOPHYSICAL RESEARCH LETTERS, 2001, 28, ISI:000166415400001

Rose, MC, Jarvis, MJ, Clilverd, MA, Maxfield, DJ, Rosenberg, TJ, The effect of snow accumulation on imaging riometer performance, RADIO SCIENCE, 2000, 35, ISI:000089606900008

Thomson, NR, Clilverd, MA, Solar cycle changes in daytime VLF subionospheric attenuation, JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 2000, 62, ISI:000088107200006

Rodger, CJ, Clilverd, MA, Yearby, KH, Smith, AJ, Is magnetospheric line radiation man-made?, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2000, 105, ISI:000087962100022

Clilverd, MA, Jenkins, B, Thomson, NR, Plasmaspheric storm time erosion, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2000, 105, ISI:000087351900038

Rodger, CJ, Clilverd, MA, Yearby, KH, Smith, AJ, Temporal properties of magnetospheric line radiation, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 2000, 105, ISI:000084796700027

Clilverd, MA, Rodger, CJ, Thomson, NR, Investigating seismoionospheric effects on a long subionospheric path, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1999, 104, ISI:000084318800015

Rodger, CJ, Clilverd, MA, Thomson, NR, Modeling of subionospheric VLF signal perturbations associated with earthquakes, RADIO SCIENCE, 1999, 34, ISI:000082778600012

Clilverd, MA, Yeo, RF, Nunn, D, Smith, AJ, Latitudinally dependent Trimpi effects: Modeling and observations, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1999, 104, ISI:000082360100013

Menk, FW, Orr, D, Clilverd, MA, Smith, AJ, Waters, CL, Milling, DK, Fraser, BJ, Monitoring spatial and temporal variations in the dayside plasmasphere using geomagnetic field line resonances, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1999, 104, ISI:000082360100021

Rodger, CJ, Clilverd, MA, Yearby, KH, Smith, AJ, Magnetospheric line radiation observations at Halley, Antarctica, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1999, 104, ISI:000081790700038

Clilverd, MA, Watkins, NW, Smith, AJ, Yearby, KH, Diurnal and annual variations in 10-kHz radio noise, RADIO SCIENCE, 1999, 34, ISI:000081627300014

Clilverd, MA, Thomson, NR, Rodger, CJ, Sunrise effects on VLF signals propagating over a long north-south path, RADIO SCIENCE, 1999, 34, ISI:000081627300015

Rishbeth, H, Clilverd, M, Long-term change in the upper atmosphere, ASTRONOMY & GEOPHYSICS, 1999, 40, ISI:000080581500016

Watkins, NW, Clilverd, MA, Smith, AJ, Yearby, KH, A 25-year record of 10 kHz sferics noise in Antarctica: Implications for tropical lightning levels, GEOPHYSICAL RESEARCH LETTERS, 1998, 25, ISI:000077282400029

Clilverd, MA, Clark, TDG, Clarke, E, Rishbeth, H, Increased magnetic storm activity from 1868 to 1995, JOURNAL OF ATMOSPHERIC AND SOLAR-TERRESTRIAL PHYSICS, 1998, 60, ISI:000076517400010

Thomson, NR, Clilverd, MA, Smith, AJ, Evidence of more efficient whistler-mode transmission during periods of increased magnetic activity,ANNALES GEOPHYSICAE-ATMOSPHERES HYDROSPHERES AND SPACE SCIENCES, 1997, 15, ISI:A1997XV25900005

LevTov, SJ, Inan, US, Smith, AJ, Clilverd, MA, Characteristics of localized ionospheric disturbances inferred from VLF measurements at two closely spaced receivers, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1996, 101, ISI:A1996UV41500047

Clilverd, MA, Thomson, NR, Smith, AJ, Ducted whistler-mode signals received at two widely spaced locations, ANNALES GEOPHYSICAE-ATMOSPHERES HYDROSPHERES AND SPACE SCIENCES, 1996, 14, ISI:A1996UT71400005

Yearby, KH, Clilverd, NA, Doppler shift pulsations on whistler mode signals from a VLF transmitter, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 1996, 58, ISI:A1996UQ45700011

Clilverd, MA, Horne, RB, Ground-based evidence of latitude-dependent cyclotron absorption of whistler mode signals originating from VLF transmitters, JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1996, 101, ISI:A1996TT92300008

CLILVERD, MA, THOMSON, NR, SMITH, AJ, THE EFFECT OF THE MIDLATITUDE IONOSPHERIC TROUGH ON WHISTLER-MODE DUCTING DURING MAGNETIC STORMS, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 1995, 57, ISI:A1995RA32800012

BALMFORTH, HF, CLILVERD, MA, SMITH, AJ, A CASE-STUDY OF STORM COMMENCEMENT AND RECOVERY PLASMASPHERIC ELECTRIC-FIELDS NEAR L=2.5 AT EQUINOX, ANNALES GEOPHYSICAE-ATMOSPHERES HYDROSPHERES AND SPACE SCIENCES, 1994, 12, ISI:A1994PC44500005

CLILVERD, MA, THOMSON, NR, SMITH, AJ, THE INFLUENCE OF IONOSPHERIC ABSORPTION ON MIDLATITUDE WHISTLER-MODE SIGNAL OCCURRENCE FROM VLF TRANSMITTERS, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 1993, 55, ISI:A1993LL79200013

CLILVERD, MA, CLARK, TDG, SMITH, AJ, THOMSON, NR, OBSERVATION OF A DECREASE IN MIDLATITUDE WHISTLER-MODE SIGNAL OCCURRENCE PRIOR TO GEOMAGNETIC STORMS, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 1993, 55, ISI:A1993LL79200014

CLILVERD, MA, SMITH, AJ, THOMSON, NR, THE EFFECTS OF IONOSPHERIC HORIZONTAL ELECTRON-DENSITY GRADIENTS ON WHISTLER MODE SIGNALS, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 1992, 54, ISI:A1992JF09100026

CLILVERD, MA, THOMSON, NR, SMITH, AJ, OBSERVATION OF 2 PREFERRED PROPAGATION PATHS FOR WHISTLER MODE VLF SIGNALS RECEIVED AT A NONCONJUGATE LOCATION, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 1992, 54, ISI:A1992JF09100027

SAZHIN, SS, SMITH, AJ, BULLOUGH, K, CLILVERD, MA, SAXTON, JM, STRANGEWAYS, HJ, TARCSAI, G, GROUP DELAY TIMES OF WHISTLER-MODE SIGNALS FROM VLF TRANSMITTERS OBSERVED AT FARADAY, ANTARCTICA, JOURNAL OF ATMOSPHERIC AND TERRESTRIAL PHYSICS, 1992, 54, ISI:A1992GZ00400007

CLILVERD, MA, SMITH, AJ, THOMSON, NR, THE ANNUAL VARIATION IN QUIET TIME PLASMASPHERIC ELECTRON-DENSITY, DETERMINED FROM WHISTLER MODE GROUP DELAYS, PLANETARY AND SPACE SCIENCE, 1991, 39, ISI:A1991GF34500013

SMITH, AJ, CLILVERD, MA, MAGNETIC STORM EFFECTS ON THE MIDLATITUDE PLASMASPHERE, PLANETARY AND SPACE SCIENCE, 1991, 39, ISI:A1991GF34500014

TAYLOR, MJ, VANEYKEN, AP, RISHBETH, H, WITT, G, WITT, N, CLILVERD, MA, SIMULTANEOUS OBSERVATIONS OF NOCTILUCENT CLOUDS AND POLAR MESOSPHERIC RADAR ECHOES - EVIDENCE OF NON-CORRELATION, PLANETARY AND SPACE SCIENCE, 1989, 37, ISI:A1989AN64900012
 


 

Mark Clilverd World Tour

 

Mark and Sal Clilverd near Wanaka, New Zealand (February 2016)

 

Mark overlooking the Oribi Gorge Nature Reserve just south of Durban, a feature which was cut by the Mzimkulwana river (October 2015)

 

 

Mark (and Craig Rodger) admiring the aurora in Luosto, Finland (December 2015)

 

 

Mark with a Kaka (NZ native parrot) on his shoulder when visiting the Orokonui Ecosanctuary (March 2014)

 

 

Mark holding the base of a BARREL balloon about to be launched from Halley, Antarctica (4 January 2013)

 

Mark in front of an Emperor Penguin colony at Windy Creek (near Halley) on Christmas Day (25 December 2012)

 

Mark in front of the nearly completed Halley VI base, Antarctica (February 2012)

 

 

Mark in Forks, Washington State, USA during an AARDDVARK installation (October 2011)

 

Mark at the sign in front of Scott Base, Ross Island, Antarctica (November 2010)

 

Mark in front of the active volcano, Mt Erebus, Ross Island, Antarctica. Note that Shackelton's hut at Cape Royds is in the background on the right (November 2010)

 

Mark stands near the summit of Helvellyn, the 3rd highest mountain in England (September 2009)

Mark looking over Tongariro National Park (December 2007)

Mark, Craig and Esa Turunen at the CHAMOS team meeting, Luosto, Finland (November 2007)

2007 IUGG conference in Perugia (July 2007)

Mark during the 2007 IUGG conference (July 2007)

Mark at Fort Churchill, Canada (May 2007)

Moeraki Beach, New Zealand (late January 2007)

Table Mountain, Cape Town, South Africa (January 2006)

BAS Twin Otter aircraft (January 2006)

Faraday, Antarctica (January 2006)

 

With AARDDVARK antenna in Ny Alesund, Spitzbergen (June 2005)

Visiting János Lichtenberger at Budapest, Hungary (August 2004)