| Impact of different energies of precipitating particles on NOx generation in the middle and upper atmosphere during geomagnetic storms E Turunen, PT Verronen, A Seppälä, CJ Rodger, MA Clilverd, ... Journal of Atmospheric and Solar-Terrestrial Physics 71 (10-11), 1176-1189, 2009 | 221 | 2009 |
| Diurnal variation of ozone depletion during the October–November 2003 solar proton events PT Verronen, A Seppälä, MA Clilverd, CJ Rodger, E Kyrölä, CF Enell, ... Journal of Geophysical Research: Space Physics 110 (A9), 2005 | 176 | 2005 |
| Evidence for long‐term cooling of the upper atmosphere in ionosonde data T Ulich, E Turunen Geophysical Research Letters 24 (9), 1103-1106, 1997 | 164 | 1997 |
| Emerging pattern of global change in the upper atmosphere and ionosphere J Laštovička, RA Akmaev, G Beig, J Bremer, JT Emmert, C Jacobi, ... Annales Geophysicae 26 (5), 1255-1268, 2008 | 152 | 2008 |
| Long-term trends in foF2: A comparison of various methods J Laštovička, AV Mikhailov, T Ulich, J Bremer, AG Elias, NO de Adler, ... Journal of Atmospheric and Solar-Terrestrial Physics 68 (17), 1854-1870, 2006 | 135 | 2006 |
| Remote sensing space weather events: Antarctic‐Arctic radiation‐belt (dynamic) deposition‐VLF atmospheric research Konsortium network MA Clilverd, CJ Rodger, NR Thomson, JB Brundell, T Ulich, ... Space Weather 7 (4), 2009 | 124 | 2009 |
| Observations of relativistic electron precipitation from the radiation belts driven by EMIC waves CJ Rodger, T Raita, MA Clilverd, A Seppälä, S Dietrich, NR Thomson, ... Geophysical Research Letters 35 (16), 2008 | 110 | 2008 |
| Ground-based instruments of the PWING project to investigate dynamics of the inner magnetosphere at subauroral latitudes as a part of the ERG-ground coordinated observation network K Shiokawa, Y Katoh, Y Hamaguchi, Y Yamamoto, T Adachi, M Ozaki, ... Earth, Planets and Space 69, 1-21, 2017 | 99 | 2017 |
| World-wide lightning location using VLF propagation in the Earth-ionosphere waveguide RL Dowden, RH Holzworth, CJ Rodger, J Lichtenberger, NR Thomson, ... IEEE Antennas and Propagation Magazine 50 (5), 40-60, 2008 | 97 | 2008 |
| Predicting solar cycle 24 and beyond MA Clilverd, E Clarke, T Ulich, H Rishbeth, MJ Jarvis Space weather 4 (9), 2006 | 85 | 2006 |
| Semiannual and annual variations in the height of the ionospheric F2-peak H Rishbeth, KJF Sedgemore-Schulthess, T Ulich Annales Geophysicae 18, 285-299, 2000 | 79 | 2000 |
| A new method to determine the solar cycle length K Mursula, T Ulich Geophysical Research Letters 25 (11), 1837-1840, 1998 | 77 | 1998 |
| Ground‐based estimates of outer radiation belt energetic electron precipitation fluxes into the atmosphere MA Clilverd, CJ Rodger, RJ Gamble, T Ulich, T Raita, A Seppälä, ... Journal of Geophysical Research: Space Physics 115 (A12), 2010 | 66 | 2010 |
| Parameterisation of the chemical effect of sprites in the middle atmosphere CF Enell, E Arnone, T Adachi, O Chanrion, PT Verronen, A Seppälä, ... Annales Geophysicae 26 (1), 13-27, 2008 | 65 | 2008 |
| Modelling the effects of the October 1989 solar proton event on mesospheric odd nitrogen using a detailed ion and neutral chemistry model PT Verronen, E Turunen, T Ulich, E Kyrölä Annales Geophysicae 20 (12), 1967-1976, 2002 | 65 | 2002 |
| Dynamic geomagnetic rigidity cutoff variations during a solar proton event CJ Rodger, MA Clilverd, PT Verronen, T Ulich, MJ Jarvis, E Turunen Journal of Geophysical Research: Space Physics 111 (A4), 2006 | 61 | 2006 |
| KAIRA: The Kilpisjärvi atmospheric imaging receiver array—System overview and first results D McKay-Bukowski, J Vierinen, II Virtanen, R Fallows, M Postila, T Ulich, ... IEEE Transactions on Geoscience and Remote Sensing 53 (3), 1440-1451, 2014 | 60 | 2014 |
| Reconstructing the long‐term aa index MA Clilverd, E Clarke, T Ulich, J Linthe, H Rishbeth Journal of Geophysical Research: Space Physics 110 (A7), 2005 | 55 | 2005 |
| Modification of midlatitude ionospheric parameters in the F2 layer by persistent high‐speed solar wind streams MH Denton, T Ulich, E Turunen Space Weather 7 (4), 2009 | 51 | 2009 |
| The causes of long‐term change in the aa index MA Clilverd, TDG Clark, E Clarke, H Rishbeth, T Ulich Journal of Geophysical Research: Space Physics 107 (A12), SSH 4-1-SSH 4-7, 2002 | 51 | 2002 |