Dr Mark Clilverd Senior Scientist Climate Programme 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.

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-onwards)

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

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 2010)

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 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)