List of Publications

updated: 2019-07-18
ResearcherID G-3727-2018 – ORCiD 0000-0001-8217-022X

Papers 2019

  1. Denton, M H, R Kivi, Th Ulich, C J Rodger, M A Clilverd, J S Denton, M Lester, Observed response of stratospheric and mesospheric composition to sudden stratospheric warmings, J. Atm. Sol.-Terr. Phys., 191, 10.1016/j.jastp.2019.06.001, 2019.

Papers 2018

  1. Chau, J L, D McKay, J P Vierinen, C La Hoz, Th Ulich, M Lehtinen, R Latteck, Multi-static spatial and angular studies of polar mesospheric summer echoes combining MAARSY and KAIRA, Atm. Phys. Chem., 18, 9547-9560, 2018.
  2. Denton, M H, R Kivi, Th Ulich, M A Clilverd, C J Rodger, P von der Gathen, Northern hemisphere stratospheric ozone depletion caused by solar proton events: The role of the polar vortex, Geophys. Res. Lett., 45, 10.1002/2017GL075966, 2018.
  3. Denton, M H, R Kivi, Th Ulich, C J Rodger, M A Clilverd, R B Horne, A J Kavanagh, Solar proton events and stratospheric ozone depletion over northern Finland, J. Atm. Sol.-Terr. Phys., 177, 218-227, 2018.

Papers 2017

  1. Grandin, M, A T Aikio, A Kozlovsky, Th Ulich, T Raita, Cosmic radio noise absorption in the high-latitude ionosphere during solar wind high-speed streams, J Geophys Res: Space Phys, 122 (5), 5203-5223, 10.1002/2017JA023923, 2017.
  2. Shiokawa, K, Y Kato, Y Hamaguchi, Y Yamamoto, T Adachi, M Ozaki, S-I Oyama, M Nosé, T Nagatsuma, Y Tanaka, Y Otsuka, Y Miyoshi, R Kataoka, Y Takagi, Y Takeshita, A Shinbori, S Kurita, T Hori, N Nishitani, I Shinohara, F Tuchiya, Y Obana, S Suzuki, N Takahashi, K Seki, A Kadokura, K Hosokawa, Y Ogawa, M Connors, J M Ruohoniemi, M Engebretson, E Turunen, Th Ulich, J Manninen, T Raita, A Kero, A Oksanen, M Back, K Kauristie, J Mattanen, D Baishev, V Kurkin, A Oinats, A Pashinin, R Vasilyev, R Rakhmatulin, W Bristow, M Karjala, 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, Earth, Planets and Space, 69:160, 10.1186/s40623-017-0745-9, 2017.

Papers 2016

  1. Enell, C-F, A Kozlovsky, T Turunen, Th Ulich, S Välitalo, C Scotto, M Pezzopane, Comparison between manual scaling and Autoscala automatic scaling applied to Sodankyla Geophysical Observatory ionograms, Geoscientific Instrumentation, Methods and Data Systems, 5, 53-64, 2016.
  2. Fallows, R A, M M Bisi, B Forte, Th Ulich, A A Konovalenko, G Mann, C Vocks, Separating Nightside Interplanetary and Ionospheric Scintillation with LOFAR, Astrophys. J. Lett., 828 L7 (6pp), 10.3847/2041-8205/828/1/L7, 2016.
  3. Norberg, J, L Roininen, A Kero, T Raita, Th Ulich, M Markkanen, L Juusola, K Kauristie, Sodankylä ionospheric tomography data set 2003-2014, Geoscientific Instrumentation, Methods and Data Systems, 5, 263-270, 2016.

Papers 2015

  1. Grandin, M, A Aikio, A Kozlovsky, Th Ulich, T Raita, Effects of solar wind high-speed streams on the high-latitude ionosphere: Superposed-epoch study, J. Geophys. Res., 120 (12), 10669-10687, 10.1002/2015JA021785, 2015.
  2. Lukianova, R, A Kozlovsky, S Shalimov, Th Ulich, M Lester, Thermal and dynamical perturbations in the winter polar MLT region associated with sudden stratospheric warmings under conditions of low solar activity, J. Geophys. Res., 120, 5226-5240, 10.1002/2015JA021269, 2015.
  3. McKay, D, R Fallows, M Norden, A Aikio, J Vierinen, F Honary, S Marple, Th Ulich, All-sky interferometric riometry, Radio Sci., 50 (10), 1050-1061, 2015.
  4. McKay-Bukowski, D, J Vierinen, I I Virtanen, R Fallows, M Postila, Th Ulich, O Wucknitz, M Brentjens, N Ebbendorf, C-F Enell, M Gerbers, T Grit, P Gruppen, A Kero, T Iinatti, M S Lehtinen, H Meulman, M Norden, M Orispää, T Raita, J P de Reijer, L Roininen, A Schoenmakers, K Stuurwold and E Turunen, KAIRA: The Kilpisjärvi Atmospheric Imaging Receiver Array - System overview and first results, IEEE Transactions on Geoscience and Remote Sensing, 53 (3), 1440-1451, 10.1109/TGRS.2014.2342252, 2015.
  5. Neal, J J, C J Rodger, M A Clilverd, N R Thomson, T Raita, Th Ulich, Long-term determination of energetic electron precipitation into the atmosphere from AARDDVARK subionospheric VLF observations, J. Geophys. Res., 120 (3), 2194-2211, 10.1002/2014JA020689, 2015.
  6. Roininen, L., M. Laine, Th.Ulich, Time-varying ionosonde trend: Case study of Sodankylä hmF2 data 1957-2014, J. Geophys. Res., 120, 10.1002/2015JA021176, 2015.

Papers 2014

  1. Fallows, R A, W A Coles, D McKay-Bukowski, J Vierinen, I I Virtanen, M Postila, Th Ulich, C-F Enell, A Kero, T Iinatti, M Lehtinen, M Orispää, T Raita, L Roininen, E Turunen, M Brentjens, N Ebbendorf, M Gerbers, T Grit, P Gruppen, H Meulman, M Norden, J-P de Reijer, A Schoenmakers, K Stuurwold, Broadband meter-wavelength observations of ionospheric scintillation, J. Geophys. Res., 119 (12), 10544-10560, 10.1002/2014JA020406, x2014.
  2. Denton, M H, M J Kosch, J E Borovsky, M A Clilverd, R H W Friedel, Th Ulich, First optical observations of energetic electron precipitation at 4278 Å caused by a powerful VLF transmitter, Geophys. Res. Lett., 41, 2237–2242, 10.1002/2014GL059553, 2014.
  3. Martini, D, C-F Enell, A Aikio, Th Ulich, Y-S Kwak, Report on Science Project for Probing the High-Latitude Ionosphere with Complementary Radar and Energetic Neutral Atom (ENA) Measurements, Int. J. Geosci., 5, 607-610, 10.4236/ijg.2014.56055, 2014.

Papers 2013

  1. Blagoveshchenskii, D, D D Rogov, Th Ulich, Variations in the Horizontal Correlation Radius of the Ionosphere during a Magnetospheric Substorm, Geomagnetism and Aeronomy, 53, No. 2, pp. 166-176, 10.1134/ S0016793213020035, 2013 (original in Russian, 10.7868/ S001679401302003X).
  2. Kozlovsky, A, T Turunen, Th Ulich, Rapid-run ionosonde observations of traveling ionospheric disturbances in the auroral ionosphere, J. Geophys. Res., 118, 5265-5276, 10.1002/jgra.50474, 2013.

Papers 2012

  1. Clilverd, M. A., C. J. Rodger, D. Danskin, M. E. Usanova, T. Raita, Th.Ulich, E. L. Spanswick, Energetic particle injection, acceleration, and loss during the geomagnetic disturbances which upset Galaxy 15, J. Geophys. Res., 117, A12213, 10.1029/2012JA018175, 2012.
  2. Denton, J. J., M. H. Denton, A. J. Kavanagh, H. Harron, Th.Ulich, J. S. Denton, Training school pupils in the scientific method: student participation in an international VLF radio experiment, Phys. Ed., 47(1), 64-68, 10.1088/0031- 9120/47/1/64, 2012.
  3. Kavanagh, A. J., F. Honary, E. F. Donovan, Th.Ulich, M. H. Denton, Key features of >30 keV electron precipitation during high speed solar wind streams: A superposed epoch analysis, J. Geophys. Res., 117, A00L09, 10.1029/2011JA017320, 2012.
  4. Martini, D., K. Mursula, Th.Ulich, V. S. Pandey, K.-H. Kim, D.-H. Lee, Long-term changes in indices of geomagnetic activity at the auroral station Sodankylä, Adv. Space Res., 50(6), 690-699, 10.1016/j.asr.2012.01.013, 2012.

Papers 2011

  1. Enell, C.-F., J. Hedin, J. Stegman, G. Witt, M. Friedrich, W. Singer, G. Baumgarten, B. Kaifler, U.-P. Hoppe, B. Gustavsson, U. Brändström, M. Khaplanov, A. Kero, Th.Ulich, E. Turunen, The Hotel Payload 2 campaign: Overview of NO, O and electron density measurements in the upper mesosphere and lower thermosphere, J. Atm. Sol.-Terr. Phys., 73, 2228-2236, 10.1016/j. jastp.2011.01.001, 2011.
  2. Martini, D., M. Orispää, Th.Ulich, M. Lehtinen, K. Mursula, D.-H. Lee, Kalman filter technique for defining solar regular geomagnetic variations: Comparison of analog and digital methods at Sodankylä Observatory, J. Geophys. Res., 116, A06102, 10.1029/2010JA016343, 2011.

Papers 2010

  1. Clilverd, M. A., C. J. Rodger, S. Dietrich, T. Raita, Th.Ulich, E. Clarke, A. W. P. Thomson, A. J. Kavanagh, High-latitude geomagnetically induced current events observed on very low frequency radio wave receiver systems, Radio Sci., 45, RS2006, 10.1029/2009RS004215, 2010.
  2. Clilverd, M. A., C. J. Rodger, R. J. Gamble, Th.Ulich, T. Raita, A. Seppälä, J. C. Green, N. R. Thomson, J.-A. Sauvaud, M. Parrot, Ground-based estimates of outer radiation belt energetic electron precipitation fluxes into the atmosphere, J. Geophys. Res., 115, A12304, 10.1029/2010JA015638, 2010.
  3. Nygrén, T., and Th.Ulich, Calculation of signal spectrum by means of stochastic inversion, Ann. Geophys., 28, 1409-1418, 10.5194/angeo-28-1409-2010, 2010.
  4. Rodger, C. J., M. A. Clilverd, A. Seppälä, N. R. Thomson, R. J. Gamble, M. Parrot, J. Sauvaud, Th.Ulich, Radiation belt electron precipitation due to geomagnetic storms: Significance to middle atmosphere ozone chemistry, J. Geophys. Res., 115, A11320, 10.1029/2010JA015599, 2010.

Papers 2009

  1. 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, E. Turunen, Remote sensing space weather events: Antarctic-Arctic Radiation-belt (Dynamic) Deposition-VLF Atmospheric Research Konsortium network, Space Weather, 7, S04001, 10.1029/2008SW000412, 2009.
  2. Turunen, E., P. T. Verronen, A. Seppälä, C. J. Rodger, M. A. Clilverd, J. Tamminen, C.-F. Enell, Th.Ulich, Impact of different precipitation energies on NOx generation during geomagnetic storms, J. Atmos. Sol.-Terr. Phys., 71, 1176-1189, 2009.
  3. Denton, M. H., Th.Ulich, E. Turunen, Modification of midlatitude ionospheric parameters in the F2 layer by persistent high-speed solar wind streams, Space Weather, 7, S04006, 10.1029/2008SW000443, 2009.

Papers 2008

  1. Dowden, R. L., R. H. Holzworth, C. J. Rodger, J. Lichtenberger, N. R. Thomson, et al. (35 authors), World-wide lightning location using VLF propagation in the Earth-ionosphere waveguide, IEEE Ant. Prop. Mag., 50, No 5, 40-60, 10.1109/MAP.2008.4674710, 2008.
  2. Enell, C.-F., E. Arnone, T. Adachi, O. Chanrion, P. T. Verronen, A. Seppälä, T. Neubert, Th.Ulich, E. Turunen, Y. Takahashi, R.-R. Hsu, Parameterisation of the chemical effect of sprites in the middle atmosphere, Ann. Geophys., 26, 13-27, 2008.
  3. Enell, C.-F., P. T. Verronen, M. J. Beharrell, J. P. Vierinen, A. Kero, A. Seppälä, F. Honary, Th.Ulich, E. Turunen, Case study of the mesospheric and lower thermospheric effects of solar X-ray flares: coupled ion-neutral modelling and comparison with EISCAT and riometer measurements, Ann. Geophys., 26, 2311-2321, 2008.
  4. Laštovička, J., R. A. Akmaev, G. Beig, J. Bremer, J. T. Emmert, C. Jacobi, M. J. Jarvis, G. Nedoluha, Yu. I. Portnyagin, Th.Ulich, Emerging pattern of global change in the upper atmosphere and ionosphere, Ann. Geophys., 26, 1255-1268, 2008.
  5. Rodger, C. J., T. Raita, M. A. Clilverd, A. Seppälä, S. Dietrich, N. R. Thomson, Th.Ulich, Observations of relativistic electron precipitation from the radiation belts driven by EMIC waves, Geophys. Res. Lett., 35, L16106, 10.1029/2008GL034804, 2008.

Papers 2007

  1. Clilverd, M. A., C. J. Rodger, R. M. Millan, J. G. Sample, M. Kokorowski, M. P. McCarthy, Th.Ulich, T. Raita, A. J. Kavanagh, E. Spanswick, Energetic particle precipitation into the middle atmosphere triggered by a coronal mass ejection, J. Geophys. Res., 112, A12206, 10.1029/2007JA012395, 2007.
  2. Kero, A., C.-F. Enell, Th.Ulich, E. Turunen, M. T. Rietveld, F. H. Honary, Statistical signature of active D-region HF heating in IRIS riometer data from 1994-2004, Ann. Geophys., 25, 407-415, 2007.
  3. Ulich, Th., M. A. Clilverd, M. J. Jarvis, H. Rishbeth, Unravelling Signs of Global Change in the Ionosphere, in "Space Weather - Research Towards Applications in Europe", ed. J. Lilensten, Astrophys. Space Sci. Library, Vol. 344, pp. 95-105, Springer, Dordrecht, The Netherlands, 2007.

Papers 2006

  1. Clilverd, M. A., E. Clarke, Th.Ulich, H. Rishbeth, M. J. Jarvis, Predicting Solar Cycle 24 and beyond, Space Weather, 4, S09005, 10.1029/2005SW000207, 2006.
  2. Clilverd, M. A., C. J. Rodger, Th.Ulich, The importance of atmospheric precipitation in storm-time relativistic electron flux drop outs, Geophys. Res. Lett., 33, L01102, 10.1029/2005GL024661, 2006.
  3. Clilverd, M. A., A. Seppälä, C. J. Rodger, N. R. Thomson, P. T. Verronen, E. Turunen, Th.Ulich, J. Lichtenberger, P. Steinbach, Modelling polar ionospheric effects during the October-November 2003 solar proton events, Radio Sci., 41, RS2001, 10.1029/2005RS003290.
  4. Laštovička, J., A. V. Mikhailov, Th. Ulich, J. Bremer, A. G. Elias, N. Ortiz de Adler, V. Jara, R. Abarca del Rio, A. J. Foppiano, E. Ovalle, A. D. Danilov, Long-term trends in foF2: A comparison of various methods, J. Atm. Sol.-Terr. Phys., 68, 1854-1870, 2006.
  5. Rodger, C. J., M. A. Clilverd, Th.Ulich, P. T. Verronen, E. Turunen, N. R. Thomson, The atmospheric implications of radiation belt remediation, Ann. Geophys., 24, 2025-2041, 2006.
  6. Rodger, C. J., M. A. Clilverd, P. T. Verronen, Th.Ulich, M. J. Jarvis, E. Turunen, Dynamic geomagnetic rigidity cutoff variations during a solar proton event, J. Geophys.Res., 111, A04222, 10.1029/2005JA011395.
  7. Verronen, P. T., Th.Ulich, E. Turunen, C. J. Rodger, Sunset transition of negative charge in the D-region ionosphere during high-ionization conditions, Ann. Geophys., 24, 187-202, 2006.

Papers 2005

  1. Clilverd M. A., E. Clarke, Th.Ulich, J. Linthe, H. Rishbeth, Reconstructing the long-term aa index, J. Geophys. Res., 110, A07205, 10.1029/2004JA010762, 2005.
  2. Clilverd, M. A., C. J. Rodger, Th.Ulich, A. Seppälä, E. Turunen, A. Botman, N. R. Thomson, Modelling a large solar proton event in the southern polar atmosphere, J. Geophys. Res., 110, A09307, 10.1029/2004JA010922, 2005.
  3. Enell, C.-F., A. Kero, E. Turunen, Th.Ulich, P. Verronen, A. Seppälä, S. Marple, F. Honary, A. Senior, Effects of D-region RF heating studied with the Sodankylä Ion Chemistry model, Ann. Geophys., 23, 1575-1583, 2005.
  4. Verronen, P. T., A. Seppälä, M. A. Clilverd, C. J. Rodger, E. Kyrölä, C.-F. Enell, Th.Ulich, E. Turunen, Diurnal variation of ozone depletion during the October-November 2003 solar proton events, J. Geophys. Res., 110, A09S32, 10.1029/2004JA010932, 2005.

Papers 2004

  1. Clilverd, M. A., E. Clarke, H. Rishbeth, T. D. G. Clark, Th.Ulich, ...and a reply (to Clilverd et al., Solar Activity Levels in 2100, 2003, see below), Astronomy and Geophysics, 45, 2004.

Papers 2003

  1. Clilverd, M. A., E. Clarke, H. Rishbeth, T. D. G. Clark, Th.Ulich, Solar activity levels in 2100, Astronomy and Geophysics, 44, No. 5, 5.20-5.22, 2003.
  2. Clilverd, M. A., Th.Ulich, M. J. Jarvis, Residual solar cycle influence on trends in ionospheric F2-layer peak height, J. Geophys. Res., 108(A12), 1450, 10.1029/2003JA009838, 2003.
  3. Ulich, Th., M. A. Clilverd, H. Rishbeth, On determining long-term change in the ionosphere, EOS Trans., 84, pp 581+585, 30th December 2003.

Papers 2002

  1. Clilverd M. A., T. D. G. Clark, E. Clarke, H. Rishbeth, Th.Ulich, The causes of long-term change in the aa index, J. Geophys. Res., 107, 1441, 10.1029/2001JA000301, 2002.
  2. Jarvis, M. J., M. A. Clilverd, Th.Ulich, Methodological influences on F-region peak height trend analysis, Phys. Chem. Earth, 27, 589-594, 2002.
  3. Karinen, A., K. Mursula, J. Takalo, Th.Ulich, An Erroneous Dst Index in 1971, Proc. of the Euroconference Solar Cycle and Space Weather 2001 (SOLSPA), 443-446, ESA-SP-477, 2002.
  4. Karinen, A., K. Mursula, Th.Ulich, J. Manninen, Does the magnetosphere behave differently on weekends?, Ann. Geophys., 20, 1137-1142, 2002.
  5. Karinen, A., K. Mursula, Th.Ulich, J. Manninen, Does the Magnetosphere Behave Differently on Weekends?, Proceedings of the Euroconference Solar Cycle and Space Weather 2001 (SOLSPA), 439-442, ESA-SP-477, 2002.
  6. Verronen, P. T., E. Turunen, Th.Ulich, E. Kyrölä, Modelling the effects of the October 1989 solar proton event on mesospheric NO using a detailed ion and neutral chemistry model, Ann. Geophys., 20, 1967-1976, 2002.

Papers 2001

  1. Ulich, Th., E. Turunen, A. Karinen, Global Change and Changing Upper Atmosphere -Observations, in "Long-term Changes and Trends in the Atmosphere", ed. G. Beig, Pune, India, 2001, (solicited review).

Papers 2000

  1. Rishbeth, H., K. J. F. Sedgemore-Schulthess, Th.Ulich, Semiannual and annual variations in the height of the ionospheric F2-peak, Ann. Geophys., 18, 285-299, 2000.
  2. Ulich, Th., E. Turunen, T. Nygrén, The Effective Recombination Coefficient in the Lower Ionosphere During Localised Precipitation of Auroral Electrons, Adv. Space Res., 25, 47-50, 2000.

Papers 1999

  1. del Pozo, C. F., E. Turunen, Th.Ulich, Negative ions in the auroral mesosphere during a PCA event around sunset, Ann. Geophys., 17, 782-793, 1999.
  2. Kivi, R., E. Kyrö, T. Turunen, Th.Ulich, E. Turunen, Atmospheric Trends Over Finland: II. Troposphere and Stratosphere, Geophysica, 35, 71-85, 1999.
  3. Ulich, Th., E. Turunen, A. Karinen, R. Kivi, E. Kyrö, Atmospheric Trends Above Finland: I. Mesosphere and Thermosphere, Geophysica, 35, 59-69, 1999.
  4. Verronen, P., E. Kyrölä, E. Turunen, Th.Ulich, New Possibilities for Studying Ozone Destruction by Odd Nitrogen in the Middle Atmosphere Through GOMOS and MIPAS Measurements, ESAMS '99 - European Symposium on Atmospheric Measurements from Space, European Space Agency, WPP-161(2), ESTEC, Noordwijk, The Netherlands, 1999.

Papers 1998

  1. Mursula, K., Th.Ulich, A new method to determine solar cycle length, Geophys. Res. Lett., 25, 1837-1840, 1998.

Papers 1997

  1. Ulich, Th., E. Turunen, Evidence for long-term cooling of the upper atmosphere in ionosonde data, Geophys. Res. Lett., 24, 1103-1106, 1997.

Papers 1994

  1. Rasinkangas, R., V. Sergeev, G. Kremser, Th.Ulich, H. Singer, A. Korth, Current Disruption Signatures at Substorm Onset Observed by CRRES, Proceedings of the International Conference on Substorms 2, March 1994, Fairbanks, Alaska.
  2. Ulich, Th. Sun, Wind, and Polar Rain: The near Earth plasma environment, Proceedings of the International Conference of Physics Students, St. Petersburg, Russia, 1994.

Reports, Monographs, Edited Books

  1. McKay-Bukowski, Derek; Th.Ulich; Lehtinen, Markku; Orispää, Mikko; Teppo, Tomi; Turunen, Esa; Vierinen, Juha; Virtanen, Ilkka; Hellgren, Harri; Sarrala, Sampo; Sutinen, Samu; Mansikkaniemi, Kati; Fletcher, Michael; Solonen, Vesa; Tallkvist, Tomas; Mäkivaara, Jarkko; Pulkkinen, Janne; Tuomi, Mika; Rantamäki, Saku; Johansson, Leif, FP7 EISCAT_3D Preparatory Phase, Work Package 7, Digital Signal Processing, Deliverable D7.4, Final report, 2014.
  2. McKay-Bukowski, Derek; Th.Ulich; Orispää, Mikko; Lehtinen, Markku; Vierinen, Juha; Ettus, Matt; Hellgren, Harri; Fletcher, Michael; Mäkivaara, Jarkko, EISCAT_3D Preparatory Phase, Work Package 7, Digital Signal Processing, Deliverable D7.3, Prototype signal processing unit readiness, 2014.
  3. Ulich, Th., A-L Piippo (eds.), Abstracts from 4th Workshop on Long-Term Changes and Trends in the Atmosphere, Sodankylä, Finland, 4-8 September 2006.
  4. Manninen, J, Th.Ulich, A-L Piippo (eds.), Abstracts from 2nd VERSIM Workshop 2006, Sodankylä, Finland, 26-30 September 2006.
  5. Manninen, J, Th.Ulich, A-L Piippo (eds.), Abstracts from XXX URSI Convention on Radio Science, Sodankylä, Finland, 9-10 October 2006.

Theses

  1. Ulich, Th., The Varying Length Of The Solar Cycle As Determined By Different Methods, M.Sc. Thesis, University of Oulu, Oulu, Finland, October 1996.
  2. Ulich, Th., Solar Variability and Long-Term Trends in the Ionosphere, Ph.D. Thesis, Sodankylä Geophysical Observatory Publications, 87, SGO, Tähteläntie 112, FIN-99600 Sodankylä, Finland, May 2000.

Abstracts 2020

  1. Ulich, Th., T. Raita, A. Kozlovsky, I. Usoskin, A. Kero, J. Manninen, E. Tanskanen, Sodankylä Geophysical Observatory – Monitoring Space Weather on the Ground, Finnish Space Workshop, Espoo, Finland, 20-22 January 2020.
  2. Ulich, Th., U. Brändsröm, and the Nordic Observatory Team, SGO Observations - Towards a Nordic Observatory Roadmap, XI Observatory Days, Sodankylä, Finland, 8-10 January 2019.

Abstracts 2019

  1. Oyama, S-I, A Aikio, M G Conde, H Vanhamäki, I I Virtanen, Th Ulich, U Brändström, P Verronen, M Anderson, N Kalakoski, L Roininen, S Lasanen, A Workayehu, K Shiokawa, H Xu, M Ishii, M Hirahara, T Sakanoi, M Kagitani, J Sorri, T Teppo, Y Tanaka, C Fallen, B J Watkins, M Orispää, Y Ogawa, L Cai, E Turunen, K Kauristie, T T Tsuda, J Kurihara, Spatial distribution of the polar thermospheric wind acceleration and importance of the 2D measurement with SDIs, AGU Fall Meeting, San Francisco, USA, 9-13 December 2019.
  2. Oyama, S-I, A Aikio, M G Conde, H Vanhamäki, I I Virtanen, Th Ulich, U Brändström, P Verronen, M Anderson, N Kalakoski, L Roininen, S Lasanen, A Workayehu, K Shiokawa, H Xu, M Ishii, M Hirahara, T Sakanoi, M Kagitani, J Sorri, T Teppo, Y Tanaka, C Fallen, B J Watkins, M Orispää, Y Ogawa, L Cai, E Turunen, K Kauristie, T T Tsuda, J Kurihara, Spatial distribution of the polar thermospheric wind acceleration and importance of the 2D measurement with SDIs, 19th International EISCAT Symposium 2019 and 46th Annual European Meeting on Atmospheric Studies by Optical Methods, Oulu, Finland, 19th - 23rd August 2019.
  3. Jia, J, Th Ulich, A Kero, E Turunen, Mesospheric Monitoring of Ozone using Ku-band radiometer, 10th International Limb Workshop, Greifswald, Germany, 3-7 June 2019.
  4. Jia, J, Th Ulich, A Kero, E Turunen, Nighttime mesospheric ozone changes observed from ground-based Ku-band radiometer, EGU General Assembly 2019, Vienna, Austria, 7-12 April 2019.
  5. Jia, J, Th Ulich, A Kero, R Kivi, P T Verronen, K Nilsen, E Sarkar, Mesospheric Monitoring of Ozone above the Polar Vortex (MeMO), XXIX Geophysics Days, Rovaniemi, Finland, 21-22 March 2019.

Abstracts 2018

  1. Oyama, S-I, M G Conde, A Aikio, E Turunen, K Kauristie, H Vanhamäki, I Virtanen, U Brändström, Th Ulich, L Cai, A Workayehu, K Shiokawa, M, Ishii, M Hirahara, C Fallen, B J Watkins, EISCAT_3D と熱圏大気プロファイラを用いた極域磁気圏-電離圏-熱圏結合の研究 (Study of polar-magnetosphere-ionosphere-thermosphere coupling using EISCAT_3D and thermosphere atmospheric profiler; in Japanese), Japan Consortium for Arctic Environmental Research (JCAR) Workshop, National Institute for Polar Research (NIPR), Tokyo, 12 April 2018.
  2. Oyama, S-I, E Turunen, A E Kero, P T Verronen, Y Miyoshi, A Mizuno, C J Rodger, M A Clilverd, Th Ulich, N Partamies, M Shiotani, S Saito, オーロラ高エネルギー粒子による大気微量成分への影響に関する研究 (Study on the influence of atmospheric high-energy particles on atmospheric trace constituents; in Japanese), Japan Consortium for Arctic Environmental Research (JCAR) Workshop, National Institute for Polar Research (NIPR), Tokyo, 12 April 2018.

Abstracts 2017

  1. Ulich, Th, A Kero, J Norberg, M Orispää, T Teppo, J Vierinen, L Roininen, T Raita, M Lehtinen, E Turunen, New Space Weather Instrumentation in Support of EISCAT 3D, 14th European Space Weather Week, Oostende, Belgium, 27th Nov - 1 Dec, 2017.
  2. Virtanen, I, Ogawa, Y, Hosokawa, K, Takahashi, T, Aikio, A, Ulich, Th, High-time resolution plasma drift observations with EISCAT and KAIRA, 18th EISCAT International Symposium and 15th International Workshop on Technical and Scientific Aspects of MST Radar, Tachikawa, Tokyo, Japan, 26-31 May 2017.
  3. Grandin, M, A Aikio, A Kozlovsky, Th Ulich, T Raita, Cosmic Radio Noise Absorption in the High-Latitude Ionosphere during Solar Wind High-Speed Streams, 18th EISCAT International Symposium and 15th International Workshop on Technical and Scientific Aspects of MST Radar, Tachikawa, Tokyo, Japan, 26-31 May 2017.

Abstracts 2016

  1. Virtanen, I. I., A. Aikio, L. Cai, H. Vanhamäki, Th.Ulich, Multibeam incoherent scatter radar observations with EISCAT, KAIRA and EISCAT_3D, Proceedings of the 50th annual conference of the Finnish Physical Society, Physics Days 2016, Spectroscopy: A window to the heart of nature, 29.-31.3.2016, Oulu. Report series in physical sciences, 37, 2016.

Abstracts 2015

  1. Grandin, M., A. Aikio, A. Kozlovsky, Th.Ulich, T. Raita, Effects of solar wind high-speed streams on the high-latitude ionosphere: Superposed-epoch study, 26th IUGG General Assembly, Prague, Czech Republic, 22 June - 2 July 2015.
  2. Turunen, E., R. Fallows, A. Kero, L. Kocharov, A. Kozlovsky, S. Lasanen, M. Lehtinen, J. Manninen, D. McKay-Bukowski, M. Orispää, S. Poluianov, T. Raita, L. Roininen, Th.Ulich, I. Usoskin, J. Vierinen, I. Virtanen, Highlights of recent and future polar upper atmospheric science in Finland, 21st International Symposium on Polar Science (ISPS), Korea Polar Research Institute, Incheaon, Republic of Korea, 19-20 May 2015.
  3. To be updated...

Abstracts 2014

  1. Grandin, M., A. Aikio, A. Kozlovsky, Th.Ulich, T. Raita, Effects of Solar Wind High-Speed Streams on the High-Latitude Ionosphere: Superposed-Epoch Study, 11th European Space Weather Week, Liège, Belgium, 17-21 November 2014.
  2. Ulich, Th., T. Raita, A. Kero, D. McKay-Bukowski, J. Vierinen, I. Virtanen, T. Teppo, M. Postila, New Space Weather Observation Networks in Finland, 11th European Space Weather Week, Liège, Belgium, 17-21 November 2014.
  3. Turunen, E., Th.Ulich, M. Orispää, J. Vierinen, M. Lehtinen, H. Hellgren, J. Mäkivaara, D. McKay-Bukowski, T. Teppo, I. Virtanen, M. Fletcher, System development and demo equipment for EISCAT 3D SDR concept, 40th COSPAR Scientific Assembly, 2-10 August 2014, Moscow, Russia, Abstract C0.3-9-14., Volume 40 of COSPAR Meeting, 3424, 2014.
  4. To be updated...

Abstracts 2013

  1. Enell, C.-F., W. Rideout, T. Raita, I. Häggström, A. Kozlovsky, Th.Ulich, Space Weather Data Services at Sodankylä Geophysical Observatory, 10th European Space Weather Week, Antwerp, Belgium, 18-22 November 2013.
  2. McClave, B., Th.Ulich, D. McKay-Bukowski, and the KAIRA Team, KAIRA - a multipurpose radio receiver in support of EISCAT_3D, EISCAT International Symposium, Lancaster, UK.
  3. Tjulin, A., I. Mann, I. McCrea, A. Aikio, Th.Ulich, The EISCAT_3D Science Case, 10th European Space Weather Week, Antwerp, Belgium, 18-22 November 2013.
  4. Turunen, E., A. Kero, C.-F. Enell, Th.Ulich, Excess ionisation in the mesosphere caused by relativistic electron precipitation, EISCAT International Symposium, Lancaster, UK.
  5. Ulich, Th., D. McKay-Bukowski, J. Vierinen, I. I. Virtanen, A. Kero, R. Fallows, M. Orispää, M. Postila, M. Lehtinen, KAIRA Space Weather Facility - First Results, 10th European Space Weather Week, Antwerp, Belgium, 18-22 November 2013. (poster, 21.9 MB)
  6. Vierinen, J., D. McKay-Bukowski, M. Lehtinen, A. Kero, Th.Ulich, Kilpisjärvi Atmospheric Imaging Receiver Array - First results, IEEE International Symposium on Phased Array Systems Technology, 664-668, 10.1109/ARRAY.2013.6731909, 2013.

Abstracts 2012

  1. Vierinen, J., Th.Ulich, T. Raita, D. McKay-Bukowski, M. Lehtinen, Kilpisjärvi Atmospheric Imaging Receiver Array. In 39th COSPAR Scientific Assembly, volume 39 of COSPAR Meeting, 2089 (2012).
  2. Kozlovsky, A., T. Turunen, Th.Ulich, Observations of acoustic gravity waves in the auroral ionosphere, EGU General Assembly 2012, Geophysical Research Abstracts, Vol. 14., EGU2012-5473, 2012.

Abstracts 2011

  1. Raita, T., Th.Ulich, Versatile space weather monitoring at the European high latitudes, 8th European Space Weather Week, Namur, Belgium, 28 November - 2 December 2011.
  2. Ulich, Th., I. McCrea, I. Mann, E. Turunen, EISCAT_3D: Large Next Generation Incoherent Scatter Radar for Europe, 8th European Space Weather Week, Namur, Belgium, 28 November - 2 December 2011.
  3. Ulich, Th., M. S. Lehtinen, D. McKay-Bukowski, M. J. Postila, J. Vierinen, T. Iinatti, T. Raita, L. Roininen, KAIRA - A Finnish Radio Receiver in Support of EISCAT_3D, 15th International EISCAT Workshop, Qingdao, China, 5-9 September 2011.
  4. Ulich, Th., D. McKay-Bukowski, A. T. Aikio, I. McCrea, A. Tjulin, EISCAT_3D Outreach: Establishing a Global User Community, 15th International EISCAT Workshop, Qingdao, China, 5-9 September 2011.
  5. Kero, A., C.-F. Enell, L. Roininen, Th.Ulich, E. Turunen, I. Häggström, P. T. Verronen, S.-M. Salmi, The D-region ionosphere during the solar minimum as seen by the EISCAT Svalbard continuous 1-year IPY radar experiment, XXX URSI General Assembly, Istanbul, Turkey, 13-20 August 2011.
  6. Aikio, A., Th.Ulich, M. Lehtinen, E. Turunen, EISCAT_3D, New generation Incoherent Scatter Radar to Northern Fennoscandia, 38th Annual European Meeting on Atmospheric Studies by Optical Methods, 22-26 August 2011, Siuntio, Finland.
  7. Ulich, Th., D. McKay-Bukowski, Reaching out to a global user community, 3rd EISCAT_3D User Meeting, Uppsala, Sweden, 18-20 May 2011.
  8. Ulich, Th., and the KAIRA Team, KAIRA Science, 3rd EISCAT_3D User Meeting, Uppsala, Sweden, 18-20 May 2011.
  9. McKay-Bukowski, D., and the KAIRA Team, KAIRA - Status, progress and ambitions for a combined EISCAT/LOFAR station in Finland, 3rd EISCAT_3D User Meeting, Uppsala, Sweden, 18-20 May 2011.
  10. Aikio, A. T., Th.Ulich, M. Lehtinen, E. Turunen, EISCAT_3D, New generation incoherent scatter radar in Northern Fennoscandia, XXV Geophysics Days, Oulu, Finland, 11-12 May 2011.
  11. Clilverd, M. A., C. J. Rodger, P. T. Verronen, A. Seppälä, E. Turunen, C.-F. Enell, Th.Ulich, J. Tamminen, Atmospheric signatures of REP, 3rd HEPPA Workshop, Granada, Spain, 9-11 May 2011. (solicited)
  12. Kero, A., C.-F. Enell, L. Roininen, Th.Ulich, E. Turunen, I. Häggström, P. T. Verronen, S.-M. Salmi, Anomalous variations in the quiet daytime D-region ionosphere during the 1-year IPY experiment at the EISCAT Svalbard Radar, 3rd HEPPA Workshop, Granada, Spain, 9-11 May 2011.
  13. Rodger, C. J., M. A. Clilverd, A. Seppälä, N. R. Thomson, R. J. Gamble, M. Parrot, J.-A. Sauvaud, Th.Ulich, Radiation belt electron precipitation due to geomagnetic storms: significance to middle atmosphere ozone chemistry, 3rd HEPPA Workshop, Granada, Spain, 9-11 May 2011.
  14. Seppälä, A., M. A. Clilverd, Th. Ulich, C.-F. Enell, A. Kero, D. Marsh, C. J. Rodger, E. Rozanov, T. Egorova, P.T. Verronen, S.-M. Salmi, E. Turunen, ISSI project: Geospace Coupling to Polar Atmosphere, 3rd HEPPA Workshop, Granada, Spain, 9-11 May 2011.
  15. McKay-Bukowski, D., and the KAIRA Project Team, KAIRA - Kilpisjärvi Atmospheric Imaging Receiver Array, EGU General Assembly, Vienna, Austria, 3-8 April 2011.
  16. McKay-Bukowski, D., and the KAIRA Project Team, Lateral Thinking - Sharing Technology Across Disciplines, EGU General Assembly, Vienna, Austria, 3-8 April 2011.
  17. Straub, C., K. Hocke, N. Kämpfer, P. Hoffmann, W. Singer, K. Hallgren, P. Hartogh, Th.Ulich, The Sudden Stratospheric Warming 2010 over the European Arctic region observed by ground based measurements of the Mesosphere/Mesopause region, EGU General Assembly, Vienna, Austria, 3-8 April 2011.

Abstracts 2010

  1. Rodger, C., M. Clilverd, R. Gamble, Th.Ulich, A. Seppälä, J. Green, N. Thomson, J.-A. Sauvaud, M. Parrot, Ground-based estimates of outer radiation belt energetic electron precipitation fluxes into the atmosphere, AGU Fall Meeting 2010, San Francisco, California, USA, 13-17 December 2010.
  2. Gamble, R., C. Rodger, M. Clilverd, N. Thomson, Th.Ulich, M. Parrot, J.-A. Sauvaud, Berthelier, Satellite and ground based observations of a large-scale electron precipitation event, AGU Fall Meeting 2010, San Francisco, California, USA, 13-17 December 2010.
  3. Ulich, Th., and the EISCAT_3D Project Team, EISCAT_3D: Development of a large near-Earth space monitoring system in Europe, 7th European Space Weather Week, Bruges, Belgium, 15-19 November 2010.
  4. Lichtenberger, J., M. Clilverd, B. Heilig, M. Vellanate, Th.Ulich, C. Rodger, A. Collier, A. Jorgensen, J. Reda, R. Holzworth, R. Friedel, A new, ground-based data assimilative model of the plasmasphere - a critical contribution to RB modeling for SW purposes, 7th European Space Weather Week, Bruges, Belgium, 15-19 November 2010.
  5. Clilverd, M., C. J. Rodger, R. J. Gamble, Th.Ulich, T. Raita, A. Seppälä, J. C. Green, N. R. Thomson, J.-A. Sauvaud, M. Parrot, Ground-based estimates of outer radiation belt energetic electron precipitation fluxes into the atmosphere, 4th VERSIM Workshop, Prague, Czech Republic, 13-17 September 2010.
  6. Rodger, C. J., M. A. Clilverd, A. Seppälä, N. R. Thomson, R. J. Gamble, M. Parrot, J.-A. Sauvand, Th.Ulich, Radiation belt electron precipitation from plasmaspheric hiss: Significance to atmospheric ozone chemistry, 4th VERSIM Workshop, Prague, Czech Republic, 13-17 September 2010.
  7. Nygrén, T., and Th.Ulich, Stochastic Inversion in Calculating the Spectrum of Signals with Uneven Sampling, XXXII Finnish URSI Convention on Radio Science, Oulu, Finland, 26 August 2010.
  8. Ulich, Th., A. Aikio, I. McCrea, E. Turunen, EISCAT_3D: The Europeran Three-Dimensional Imaging Radar for Atmospheric and Geospace Research, 38th COSPAR Scientific Assembly, Bremen, Germany, 18-24 July 2010.
  9. Ulich, Th., T. Turunen, E. Turunen, Auroral Ionosphere in Very High Time Resolution: The New Sodankylä Ionosonde, 38th COSPAR Scientific Assembly, Bremen, Germany, 18-24 July 2010.
  10. Martini, D., K. Mursula, Th.Ulich, Geomagnetic Activity at High Latitude: Case Study at the Auroral Sodankylä Station, 38th COSPAR Scientific Assembly, Bremen, Germany, 18-24 July 2010.
  11. Kero, A., C.-F. Enell, J. Vierinen, Th.Ulich, M. Clilverd, Characteristics of energetic particle precipitation determined by incoherent scatter measurements and modelling, SCOSTEP Symposium 2010, Berlin, Germany, 12-16 July 2010.
  12. Rodger, C., M. Clilverd, R. Gamble, Th.Ulich, T. Raita, A. Seppälä, J. Green, N. Thomson, J.-A. Sauvaud, M. Parrot, Ground-based estimates of outer radiation belt energetic electron precipitation fluxes into the atmosphere, SCOSTEP Symposium 2010, Berlin, Germany, 12-16 July 2010.
  13. Ulich, Th., T. Turunen, E. Turunen, Auroral ionosphere during solar minimum in very high time resolution, International Polar Year Oslo Science Conference, Oslo, Norway, 8-12 June 2010.
  14. Enell, C.-F., J. Hedin, J. Stegman, G. Witt, M. Friedrich, W. Singer, G. Baumgarten, B. Kaifler, U.-P. Hoppe, B. Gustavsson, U. Brändström, M. Khaplanov, A. Kero, Th.Ulich, E. Turunen, Hotel Payload 2 measurements of NO, O and electron density, 4th NordAuropt workshop, Apatity, Russia, May 2010.

Abstracts 2009

  1. Martini, D., K. Mursula, Th.Ulich, J. Kultima, On the definition of geomagnetic activity at high latitudes: Case study at the Sodankylä station, EOS Trans. AGU 90(52), Fall Meet. Suppl., Abstract SM11B-1582, 2009 AGU Fall Meeting, San Francisco, California, USA, 14-18 December 2009.
  2. Ulich, Th., A. Aikio, I. McCrea, K. Kauristie, E. Turunen, EISCAT_3D - Next Generation Incohrent Scatter Radar in Europe, 6th European Space Weather Week, Bruges, Belgium, 16-20 November 2009.
  3. Ulich, Th., and T. Nygrén, Unravelling long-term behaviour in historic geophysical data sets, Thule Research Seminar "Towards better understanding of Global Change", Oulanka Research Station, Oulanka, Finland, 12-14 October 2009.
  4. Ulich, Th., T. Nygrén, A. Aikio, K. Kauristie, M. Lehtinen, T. Turunen, K. U. Kaila, A. Kero, C.-F. Enell, A. Kozlovsky, T. Pitkänen, M. Orispää, J. P. Vierinen, L. Roininen, I. Virtanen, O. Amm, P. T. Verronen, N. Partamies, A. Vlasov, I. McCrea, E. Turunen, EISCAT_3D - next generation incoherent scatter radar in Europe, XII Meeting of Finnish Space Researchers FinCOSPAR, Rokua, Finland, 3-5 September 2009.
  5. Ulich, Th., J. P. Vierinen, N. Arnold, C. Thomas, SLICE - a meteor radar in Sodankylä, XII Meeting of Finnish Space Researchers FinCOSPAR, Rokua, Finland, 3-5 September 2009.
  6. Nygrén, T., and Th.Ulich, Calculation of spectrum of unevenly sampled signal by means of stochastic inversion, XII Meeting of Finnish Space Researchers FinCOSPAR, Rokua, Finland, 3-5 September 2009.
  7. Enell, C.-F., A. Kero, T. Raita, J. P. Vierinen, Th.Ulich, E. Turunen, K. U. Kaila, J. Hedin, J. Stegman, J. Gumbel, G. Witt, M. Friedrich, U. Brändström, B. Gustavsson, W. Singer, G. Baumgarten, Hotel Payload 2 rocket-borne and ground-based measurements and modelling of electron density and nitric oxide concentration profiles, 36th Annual European Meeting on Atmospheric Studies by Optical Methods, Kyiv, Ukraine, 17-22 August 2009.
  8. Ulich, Th., Space weather monitoring above Nordkalotten: hopes for the future, 14th International EISCAT Workshop, Tromsø, Norway, 3-7 August 2009.
  9. Nygrén, T., and Th.Ulich, Calculation of signal spectrum by means of stochastic inversion, 14th International EISCAT Workshop, Tromsø, Norway, 3-7 August 2009.
  10. Enell, C.-F., A. Kero, J. P. Vierinen, Th.Ulich, E. Turunen, I. Häggström, M. Friedrich, Empirical distributions of EISCAT electron densities and other retrieved parameters, with applications to improved statistical analysis methods, 14th International EISCAT Workshop, Tromsø, Norway, 3-7 August 2009.
  11. Ulich, Th., J. Vierinen, N. Arnold, C. Thomas, C.-F. Enell, and A. Kero, SLICE - a new meteor radar in Finnish Lapland, 9th International Workshop on Layered Phenomena in the Mesopause Region, Stockholm, Sweden, 12-15 July 2009.
  12. Turunen, E., A. Seppälä, M. Clilverd, C. J. Rodger, P. T. Verronen, J. Tamminen, Th.Ulich, C.-F. Enell, Upper-atmospheric NOx production by energetic particle precipitation: A mechanism for sun-earth coupling?, 9th International Workshop on Layered Phenomena in the Mesopause Region, Stockholm, Sweden, 12-15 July 2009.
  13. Ulich, Th., T. Raita, A. Wood, A. Breen, The Future of Space Environment Monitoring in the European Arctic, EISCAT_3D User Meeting 2009, Uppsala, Sweden, 28-29 May 2009.
  14. Honary, F., E. Nielsen, V. Romano, Th.Ulich, M. A. Hapgood, P. Janhunen, J. Johansson, Mars Riometer System, EGU General Assembly, Vienna, Austria, 19-24 April 2009.
  15. Ulich, Th., High-latitude space weather monitoring in Finland, EGU General Assembly, Vienna, Austria, 19-24 April 2009.
  16. Ulich, Th., M. Clilverd, M. Jarvis, H. Rishbeth, Long-term trends in the upper atmosphere, 3rd International Symposium on Space Climate, Saariselkä, Finland, 15-22 March 2009.

Abstracts 2008

  1. Raita, T, C J Rodger, M A Clilverd, A Seppälä, S Dietrich, N R Thomson, Th.Ulich, Observations of relativistic electron precipitation from the radiation belts driven by EMIC waves, 3rd VERSIM Workshop 2008, Tihany, Hungary, 15th - 20th September 2008.
  2. Enell, C.-F., B. Gustavsson, J. Hedin, J. Stegman, M. Khaplanov, A. Kero, J. P. Vierinen, K. Kaila, U. Brändström, Th.Ulich, E. Turunen, Modelled and measured NOx profiles from the HotPay2/NEMI rocket experiment and coordinated ground­based optical measurements, 35th Annual European Meeting on Atmospheric Studies by Optical Methods, Maynooth, Ireland, 24-29 August 2008.
  3. Enell, C.-F., E. Arnone, O. Chanrion, T. Adachi, A. Kero, P. T. Verronen, A. Seppälä, E. Turunen, Th.Ulich, T. Neubert, Coupled ion-neutral modelling of middle- and upper-atmospheric transient chemical effects, 19th Europhysics Conference on the Atomic and Molecular Physics of Ionized Gases, Granada, Spain, 15-19 July 2008.
  4. Rodger, C. J., M. A. Clilverd, Th.Ulich, P. T. Verronen, E. Turunen, N. R. Thomson, The atmospheric implications of radiation belt remediation, 1st International Workshop "High-Energy Particle Precipitation in the Atmosphere" (HEPPA), Helsinki, Finland, 28-30 May 2008.
  5. Seppälä, A., P. T. Verronen, M. A. Clilverd, C. J. Rodger, E. Turunen, Th.Ulich, C.-F. Enell, The effects of hard spectra solar proton events on the middle atmosphere, 1st International Workshop "High-Energy Particle Precipitation in the Atmosphere" (HEPPA), Helsinki, Finland, 28-30 May 2008.
  6. Turunen, E., P. T. Verronen, A. Seppälä, C. J. Rodger, M. A. Clilverd, J. Tamminen, C.-F. Enell, Th.Ulich, Impact of different energies of precipitating particles on NOx generation in the middle and upper atmosphere during geomagnetic storms, 1st International Workshop "High-Energy Particle Precipitation in the Atmosphere" (HEPPA), Helsinki, Finland, 28-30 May 2008.
  7. Clilverd, M. A., E. Clark, M. J. Jarvis, Th.Ulich, Reconstructing the Aa index to 1400 AD., EGU General Assembly, Vienna, Austria, 13-18 April 2008.

Abstracts 2007

  1. Enell, C.-F., B. Gustavsson, P. T. Verronen, E. Turunen, Th.Ulich, K. Kaila, J. Stegman, U. Brändström, I. Sandahl, Modelling the mesospheric effects of solar short-wave radiation, 34th Annual European Meeting on Atmospheric Studies by Optical Methods, Andenes, Norway, 27-31 August 2007.
  2. Verronen, P. T., Th.Ulich, E. Turunen, C. J. Rodger, Sunset transition in the D-region ionosphere during the October 1989 solar proton event, 13th EISCAT International Workshop, Mariehamn, Åland, Finland, 6-10 August 2007. (solicited)
  3. Turunen, E., Th.Ulich, C.-F. Enell, A. Kero, T. Raita, J. Manninen, P. T. Verronen, Energy characteristics of precipitating relativistic electrons as determined from EISCAT, VLF propagation and riometer data using D-region ion chemistry modelling, 13th EISCAT International Workshop, Mariehamn, Åland, Finland, 6-10 August 2007.
  4. Enell, C.-F., P.T. Verronen, A. M. Seppälä, A. Kero, Th.Ulich, E. Turunen, Modelling the mesospheric effects of solar short-wave radiation, 13th EISCAT International Workshop, Mariehamn, Åland, Finland, 6-10 August 2007.
  5. Enell, C.-F., E. Turunen, A. Kero, Th.Ulich, J. Gumbel, J. Stegman, J. Hedin, M. Khaplanov, P. T. Verronen, A. Seppälä, NEMI measurement of auroral nitric oxide production, 18th ESA Symposium on European Rocket and Balloon Programmes and Related Research, Visby, Sweden, 3-7 June 2007.
  6. Turunen, E., C.-F. Enell, Th.Ulich, A. Kero, K. Kaila, Rakettikoe: Yöaikaiset mesosfäärin ja termosfäärin emissiot (NEMI), XXIII Geofysiikan Päivät, Oulu, Finland, 23-24 May 2007.
  7. Ulich, Th., Monitoring the global lightning activity with the Aarddvark network, Kick-off Meeting of the IPY Project 63 "Heliosphere Impact on Geospace", Helsinki, Finland, 5-9 February 2007.

Abstracts 2006

  1. Ulich, Th., C. J. Rodger, M. A. Clilverd, T. Raita, J. Manninen, A woollen aardvark in Sodankylä, 30th URSI Convention on Radio Science, Sodankylä, Finland, 9-10 October 2006.
  2. Kero, A., C.-F. Enell, Th.Ulich, E. Turunen, Can ionospheric D region opacity for cosmic radio waves be modulated by artificial HF heating?, 30th URSI Convention on Radio Science, Sodankylä, Finland, 9-10 October 2006.
  3. Manninen, J., T. Turunen, Th.Ulich, ELF-VLF measurements at SGO, 30th URSI Convention on Radio Science, Sodankylä, Finland, 9-10 October 2006.
  4. Clilverd, M. A., C. J. Rodger, R. M. Millan, Th.Ulich, Atmospheric precipitation during storm-time relativistic electron flux drop outs, 2nd VERSIM Workshop 2006, Sodankylä, Finland, 26-30 September 2006.
  5. Turunen, E., C. J. Rodger, P. T. Verronen, A. Seppälä, Th.Ulich, M. A. Clilverd, K. Kaila, C.-F. Enell, T. Raita, J. Manninen, T. Turunen, What if we knew the energy characteristics of precipitating relativistic electrons using VLF recordings and D-region ion chemistry modelling?, 2nd VERSIM Workshop 2006, Sodankylä, Finland, 26-30 September 2006.
  6. Seppälä, A., P. T. Verronen, M. A. Clilverd, C. J. Rodger, E. Turunen, Th.Ulich, C.-F. Enell, V. Sofieva, J. Tamminen, E. Kyrölä, Importance of proton spectral hardness in the atmospheric effects of solar proton events - the Jan 2005 events, 2nd VERSIM Workshop 2006, Sodankylä, Finland, 26-30 September 2006.
  7. Clilverd, M. A., A. Seppälä, C. J. Rodger, N. R. Thomson, P. T. Verronen, E. Turunen, Th.Ulich, J. Lichtenberger, P. Steinbach, Modelling the ionospheric effects of solar proton events using the Sodankylä Ion Chemsitry model, 2nd VERSIM Workshop 2006, Sodankylä, Finland, 26-30 September 2006.
  8. Ulich, Th., M. A. Clilverd, M. J. Jarvis, H. Rishbeth, Chasing trends in noisy ionospheric data: the Sodankylä Ionosonde, 4th IAGA/ICMA/CAWSES Workshop on Long-Term Changes and Trends in the Atmosphere, Sodankylä, Finland, 4-8 September 2006.
  9. Clilverd, M. A., Th.Ulich, H. Rishbeth, E. Clarke, Long-term changes and trends (over the last 100 years) in geomagnetic and solar activity, 4th IAGA/ICMA/CAWSES Workshop on Long-Term Changes and Trends in the Atmosphere, Sodankylä, Finland, 4-8 September 2006.
  10. Lastovicka, J., A. V. Mikhailov, Th.Ulich, J. Bremer, A. D. Danilov, Long-term trends in foF2: results of a comparison of various methods, 4th IAGA/ICMA/CAWSES Workshop on Long-Term Changes and Trends in the Atmosphere, Sodankylä, Finland, 4-8 September 2006.
  11. Enell, C.-F., E. Turunen, T. Turunen, Th.Ulich, A. Seppälä, The effect of variable solar short-wave radiation on the concentration of nitric oxide in the MLT region, 4th IAGA/ICMA/CAWSES Workshop on Long-Term Changes and Trends in the Atmosphere, Sodankylä, Finland, 4-8 September 2006.
  12. Lastovicka, J., R. A. Akmaev, G. Beig, J. Bremer, J. T. Emmert, C. Jacobi, M. J. Jarvis, G. Nedoluha, Y. I. Portnyagin, Th.Ulich, Emerging pattern of global change in the upper atmosphere, 4th IAGA/ICMA/CAWSES Workshop on Long-Term Changes and Trends in the Atmosphere, Sodankylä, Finland, 4-8 September 2006.
  13. Enell, C.-F., E. Turunen, A. Kero, Th.Ulich, K. Kaila, J. Gumbel, J. Hedin, M. Khaplanov, G. Witt, Night-time Emissions from the Mesosphere and Ionosphere (NEMI), 33rd Annual European Meeting on Atmospheric Studies by Optical Methods, Kiruna, Sweden, 28 August - 1 September 2006.
  14. Turunen, E., K U Kaila, P T Verronen, Th.Ulich, C-F Enell, A Kero, T Turunen, Event studies of odd nitrogen production due to auroral electron precipitation above Sodankyla in spring 2006, 33rd Annual European Meeting on Atmospheric Studies by Optical Methods, Kiruna, Sweden, 28 August - 1 September 2006.
  15. Turunen, E, Th.Ulich, C-F Enell, A Kero, S Hyvärinen, P T Verronen, A Seppälä, C J Rodger, M A Clilverd, R Steiner, Chemical effect of excess ionisation events in mesosphere, ASIM meeting, ESTEC, Netherlands, 26-27 June 2006.
  16. Turunen, E, P T Verronen, Th.Ulich, C J Rodger, Sunset transition effects in the D-region ionosphere, EGU General Assembly, Vienna, Austria, 02-07 April 2006.

Abstracts 2005

  1. Seppälä, A., P. T. Verronen, M. A. Clilverd, C. J. Rodger, E. Kyrölä, E. Turunen, Th.Ulich, The Effects of the January 2005 Solar Events on the Middle Atmosphere, AGU Fall Meeting 2005, San Francisco, California, USA, 5-9 December 2005.
  2. Turunen, E., Th.Ulich, C.-F. Enell, A. Kero, P. T. Verronen, A. Seppälä, Global change in the upper atmosphere, Global Change in the North Seminar, University of Oulu, Oulu, Finland, 16 November 2005.
  3. Ulich, Th., Signs of global change in the upper atmosphere, 2nd European Space Weather Week, ESTEC, Noordwijk, The Netherlands, 14-18 November 2005 (solicited).
  4. Turunen, E., Th.Ulich, C.-F. Enell, A. Kero, P. T. Verronen, A. Seppälä, F. Honary, The atmospheric effect of highly relativistic electron events at high latitudes, 12th International EISCAT Workshop, Kiruna, Sweden, 29 August - 2 September 2005.
  5. Kero, A., C.-F. Enell, Th.Ulich, E. Turunen, T. Raita, P. T. Verronen, A. Seppälä, M. Rietveld, F. Honary, Cosmic radio noise absorption modified by the RF heating in the D region, 12th International EISCAT Workshop, Kiruna, Sweden, 29 August - 2 September 2005.
  6. Enell, C.-F., A. Kero, E. Turunen, Th.Ulich, T. Bösinger, P. T. Verronen, A. Seppälä, Active modification of the negative ion region (AMORE), 12th International EISCAT Workshop, Kiruna, Sweden, 29 August - 2 September 2005.
  7. Enell, C.-F., P. T. Verronen, A. Seppälä, E. Turunen, Th.Ulich, Possibility of NOx production by transient luminous events studied in a coupled ion-neutral chemical model, IAMAS 2005, Beijing, PR China, 2-11 August 2005.
  8. Ulich, Th., M. A. Clilverd, H. Rishbeth, Methods of determining long-term change: Sodankylä ionospheric data, IAGA 2005 Scientific Assembly, Toulouse, France, 18-29 July 2005 (solicited).
  9. Kero, A., C.-F. Enell, Th.Ulich, E. Turunen, T. Raita, P. Verronen, A. Seppälä, M. Rietveld, F. Honary, Artificial heating effects on the cosmis HF radio noise absorption, IAGA 2005 Scientific Assembly, Toulouse, France, 18-29 July 2005.
  10. Lastovicka, J., A. V. Mikhailov, Th.Ulich, J. Bremer, A. G. Elias, N. O. de Adler, A. D. Danilov, V. Jara, R. Abarca del Rio, A. J. Foppiano, Long-term trends in foF2: a comparison of the results of various methods, IAGA 2005 Scientific Assembly, Toulouse, France, 18-29 July 2005 (solicited).
  11. Seppälä, A., P. T. Verronen, M. A. Clilverd, C. J. Rodger, E. Turunen, Th.Ulich, C.-F. Enell, The high energy proton fluxes of January 2005: Impact on middle atmosphere, IAGA 2005 Scientific Assembly, Toulouse, France, 18-29 July 2005.
  12. Verronen, P. T., A. Seppälä, E. Kyrölä, S. Hassinen, L. Backman, A. Hauchecorne, J. L. Bertauxx, D. Fussen, C. J. Rodger, M. A. Clilverd, C.-F. Enell, E. Turunen, Th.Ulich, NO2 and ozone changes in the Northern Hemisphere middle atmosphere due to the October-November 2003 solar proton events, IAGA 2005 Scientific Assembly, Toulouse, France, 18-29 July 2005 (solicited).
  13. Turunen, E., Th.Ulich, C.-F. Enell, A. Kero, P. T. Verronen, A. Seppälä, Effect of relativistic electron precipitation on neutral atmospheric composition, CAL midterm review meeting, Crete, Greece, 20-24 June 2005.
  14. Enell, C.-F., E. Turunen, Th.Ulich, P. T. Verronen, A. Seppälä, The effect of excited neutral molecular nitrogen estimated in a coupled ion-neutral chemistry model, CAL midterm review meeting, Crete, Greece, 20-24 June 2005.
  15. Verronen, P. T., A. Seppälä, L. Backman, E. Kyrölä, S. Hassinen, C. J. Rodger, M. A. Clilverd, A. Hauchecorne, J. L. Bertaux, D. Fussen, C.-F. Enell, E. Turunen, Th.Ulich, Ozone depletion in the Northern Hemisphere middle atmosphere due to the October-November 2003 solar proton events, CAL midterm review meeting, Crete, Greece, 20-24 June 2005.
  16. Enell, C.-F., E. Turunen, A. Kero, Th.Ulich, K. Kaila, J. Gumbel, M. Khaplanov, J. Hedin, J. Stegman, G. Witt, NEMI (Night-time Emissions from the Mesosphere and Ionosphere), Finnish national COSPAR meeting, Helsinki/Stockholm, 11-13 May 2005.
  17. Enell, C.-F., A. Seppälä, P. Verronen, Th.Ulich, E. Turunen, Sprite-induced excited-state reactions studied by means of a coupled ion-neutral chemical model, General Assembly of the Eurpean Geosciences Union, Vienna, Austria, 24-29 April 2005.
  18. Turunen, E., Th. Ulich, C-F. Enell, A. Kero, P. Verronen, A. Seppälä, E. Kyrölä, Aeronomy of the high latitude ionospheric D region and mesosphere studied by the Sodankylä Ion Chemistry Model, 39th Annual Conference of the Finnish Physical Society, Espoo, Finland, 17-19 March 2005.
  19. Kero, A., C.-F. Enell, P. Verronen, A. Seppälä, Th.Ulich, T. Raita, E. Turunen, Effects of artificial RF heating on riometer absorption in the ionospheric D region, 39th Annual Conference of the Finnish Physical Society, Espoo, Finland, 17-19 March 2005.

Abstracts 2004

  1. Clilverd, M., C. Rodger, N. Thomson, Th.Ulich, E. Turunen, A. Seppälä, A. Botman, The relative impacts of energetic precipitation in the southern Polar Cap and Geomagnetic Anomally during a solar proton event, VLF Workshop, Sodankylä, Finland, 27th September - 1st October 2004.
  2. Clilverd, M., D. Nunn, C. Rodger, N. Thomson, Th.Ulich, J. Manninen, T. Rantala, The Impact of PMSE and NLC Regions on VLF Propagation, VLF Workshop, Sodankylä, Finland, 27th September - 1st October 2004.
  3. Stolle, C., S. Schlüter, S. Heise, Ch. Jacobi, N. Jakowski, S. Friedel, D. Kürschner, Th.Ulich, Tomographische Rekonstruktionen der Ionosphäre mit Hilfe von GPS-Signalen und magnetische Beobachtungen während der geomagnetischen Stürme vom Oktober/November 2003, DACH Meteorologentagung 2004, Karlsruhe, Germany, 7-10 September 2004.
  4. Ulich, Th., E. Turunen, P. Verronen, C.-F. Enell, A. Ranta, Effects of long-term cooling of the lower ionosphere on cosmic radio noise absorption, 31st Annual European Meeting on Atmospheric Studies by Optical Methods, Ambleside, Lake District, U.K., 22-28 August 2004.
  5. Turunen, E., Th.Ulich, C.-F. Enell, P. Verronen, F. Honary, Local enhancement of neutral nitric oxide during afternoon absorption spike events, 31st Annual European Meeting on Atmospheric Studies by Optical Methods, Ambleside, Lake District, U.K., 22-28 August 2004.
  6. Enell, C.-F., A. Kero, E. Turunen, Th.Ulich, P. Verronen, F. Honary, A. Senior, Negative ion chemistry studied by RF heating and riometer observations- model results, 31st Annual European Meeting on Atmospheric Studies by Optical Methods, Ambleside, Lake District, U.K., 22-28 August 2004.
  7. Turunen, E., Th.Ulich, C.-F. Enell, P. T. Verronen, A. Seppälä, Direct influence of solar energetic particles on atmospheric chemistry, Chapman Conference on Solar Energetic Plasmas and Particles, Turku, Finland, August 2004.
  8. Enell, C.-F., P. T. Verronen, A. Seppälä, Th.Ulich, A. Kero, T. Raita, E. Turunen, The Sodankylä Ion Chemistry model: Application of coupled ion-neutral chemistry modelling, NATO ASI on Sprites, Elves, and Intense Lightning Discharges, Corte, Corsika, France, 24-31 July 2004.
  9. Clilverd, M. A., E. Clarke, Th.Ulich, J. Linthe, H. Rishbeth, Reconstructing the long-term aa index of solar activity, 35th Scientific Assembly of COSPAR, Paris, France ,18-25 July 2004.
  10. Verronen, P. T., E. Turunen, Th.Ulich, R.J. Steiner, Modelling the local effect of energetic auroral electron precipitation on nitric oxide levels in the high-latitude ionosphere, 35th Scientific Assembly of COSPAR, Paris, France, 18-25 July 2004.
  11. Clilverd, M. A., E. Clarke, Th.Ulich, J. Linthe, H. Rishbeth, Reconstructing the Long-Term aa Index, Auld Reekie MIST/UKSP, Edinburgh, U.K., 29th March - 1st April 2004.
  12. Enell, C.-F., E. Turunen, Th.Ulich, P. T. Verronen, Quantification of chemical modifications induced by high-altitude discharges, 1st General Assembly of the European Geosciences Union, Nice, France, 25-30 April 2004.
  13. Enell, C.-F., E. Turunen, P. T. Verronen, Th.Ulich, High-altitude transient luminous events (TLEs) as a mechanism for solar-terrestrial coupling, 38th Annual Conference of the Finnish Physical Society, Oulu, Finland, 18-20 March 2004.
  14. Turunen, E., P. T. Verronen, Th.Ulich, C.-F. Enell, E. Kyrölä, Variation of atomic oxygen concentration in the mesosphere as observed by the EISCAT incoherent scatter radar, 38th Annual Conference of the Finnish Physical Society, Oulu, Finland, 18-20 March 2004.

Abstracts 2003

  1. Clilverd, M. A., E. Clarke, H. Rishbeth, Th.Ulich, The MLTI Impacts of Solar Activity Trends in the 20th and 21st Centuries, IUGG 2003, Sapporo, Japan, 30th June - 11th July 2003.
  2. Lehtinen, M. S., M. Markkanen, A. Väänänen, T. Nygrén, Th.Ulich, A New Satellite Tomography Chain in Scandinavia, IUGG 2003, Sapporo, Japan, 30th June - 11th July 2003.

Abstracts 2002

  1. Karinen, A., K. Mursula, Th.Ulich, J. Manninen, J. Kultima, Geomagnetic activity on weekends vs working days studied by planetary and local 3-hourly indices, Finnish COSPAR and Antares Seminar, Oulu, Finland, 28-30 October 2002.
  2. Ulich, Th., M. Füllekrug, M. Rycroft, SPECIAL - Space Processes and Electrical Changes Influencing Atmospheric Layers, Finnish COSPAR and Antares Seminar, Oulu, Finland, 28-30 October 2002.
  3. Verronen, P. T., A. Seppälä, E. Turunen, V. I. Shematovich, D.V. Bisikalo, Th.Ulich, E. Kyrölä, Odd nitrogen in the mesosphere - production by ionic reactions and secondary electrons, Finnish COSPAR and Antares Seminar, Oulu, Finland, 28-30 October 2002.
  4. Verronen, P. T., A. Seppälä, E. Turunen, V. I. Shematovich, D. V. Bisikalo, Th.Ulich, E. Kyrölä, On the Significance of Ion Chemistry on the Mesospheric Odd Nitrogen Production During Solar Proton Events, 34th COSPAR Scientific Assembly, Houston, Texas, USA, 10-19 October 2002.
  5. Clilverd, M. A., Th.Ulich, M. J. Jarvis, The influences of thermospheric winds and of residual solar cycle variability on F-region trend analysis, 27th General Assembly of the European Geophysical Society, Nice, France, 21-26 April 2002.
  6. Karinen, A., K. Mursula, Th.Ulich, J. Manninen, J. Kultima, Geomagnetic activity on weekends vs working days studied by planetary and local 3-hourly indices, 27th General Assembly of the European Geophysical Society, Nice, France, 21-26 April 2002.
  7. Karinen, A., K. Mursula, J. Takalo, Th.Ulich, An erroneous Dst index in 1971, 27th General Assembly of the European Geophysical Society, Nice, France, 21-26 April 2002.
  8. Karinen, A., K. Mursula, J. Takalo, Th.Ulich, An erroneous Dst index in 1971, XXXVI Annual Conference of the Finnish Physical Society, 14-16 March 2002, Joensuu.
  9. Karinen, A., K. Mursula, Th.Ulich, J. Manninen, Does the Magnetosphere Behave Differently on Weekends?, XXXVI Annual Conference of the Finnish Physical Society, 14-16 March 2002, Joensuu.
  10. Verronen, P. T., V. I. Shematovich, D. V. Bisikalo, E. Turunen, Th.Ulich, N2 dissociation in the mesosphere due to secondary electrons during a solar proton event: The effect on atomic nitrogen and nitric oxide, 27th General Assembly of the European Geophysical Society, Nice, France, 21-26 April 2002.

Abstracts 2001

  1. Ulich, Th., Ionospheric long-term trends depend on the method of their derivation, COST-271 Workshop, Sopron, Hungary, 25-29 September 2001.
  2. Karinen, A., K. Mursula, J. Takalo, Th.Ulich, An Erroneous Dst Index in 1971, Euroconference Solar Cycle and Space Weather, Vico Equense, Italy, 24-29 September 2001.
  3. Ulich, Th., E. Turunen, P. Verronen, T. Nygrén, K. J. F. Sedgemore-Schulthess, Modelling of pulsating aurora observed by EISCAT with the detailed Sodankylä Ion-Neutral Chemisty Model, 28th Annual Meeting on Atmospheric Studies by Optical Methods, Oulu, Finland, 19-24 August 2001.
  4. Ulich, Th., M. Lehtinen, A. Väänänen, J. Pirttilä, M. Markkanen, J. Rahkola, The New Meteor Radar of the Sodankylä Geophysical Observatory, Meteoroids 2001, Kiruna, Sweden, 6-10 August 2001.
  5. Ulich, Th., E. Turunen, P. Verronen, T. Nygrén, K. J. F. Sedgemore-Schulthess, Modelling of pulsating aurora observed by EISCAT with a detailed ion-neutral chemisty model, 10th EISCAT Workshop, Tokyo, Japan, 23-27 July 2001.
  6. Ulich, Th., N. B. Crosby, K. Schlegel, M. Füllekrug, M. J. Rycroft, SPECIAL - Space processes and electrical changes influencing atmospheric layers, 10th EISCAT Workshop, Tokyo, Japan, 23-27 July 2001.
  7. Ulich, Th., Ionospheric long-term trends depend on the method of their derivation, 2nd Workshop "Long-term Changes and Trends in the Atmosphere", Prague, Czech Republic, 2-6 July 2001 (solicited).
  8. Ulich, Th., E. Turunen, J. Manninen, Can long-term measurements of cosmic radio noise absorption reveal the mesospheric greenhouse effect?, 2nd Workshop "Long-term Changes and Trends in the Atmosphere", Prague, Czech Republic, 2-6 July 2001 (solicited).
  9. Verronen, P., E. Turunen, Th.Ulich, E. Kyrölä, Modeling mesospheric odd nitrogen during the October 1989 SPE with the detailed Sodankylä Ion-Neutral Chemistry Model, AGU Spring Meeting, Boston, U.S.A., 29 May - 2 June 2001.
  10. Ulich, Th., Does the enhanced greenhouse effect affect the upper atmosphere?, NARP Symposium, Oulu, Finland, 10-11 May 2001.
  11. Ulich, Th., E. Turunen, P. Verronen, T. Nygrén, K.J.F. Sedgemore-Schulthess, Effects of precipitating auroral particles on the neutral chemistry of the lower thermosphere, 26th General Assembly of the European Geophysical Society (Session ST11), Nice, France, 26-30 March 2001.
  12. Verronen, P., E. Turunen, Th.Ulich, E. Kyrölä, Modeling the Response of the Middle Atmosphere to the October 1989 Solar Proton Event Using a Detailed Ion and Neutral Chemistry Model, 35th Annual Meeting of the Finnish Physical Society, Jyväskylä, Finland, 22-24 March 2001.

Abstracts 2000

  1. Ulich, Th., Ground-based monitoring of space weather in Finland and Northern Scandinavia, SPECIAL Workshop 2000, Katlenburg-Lindau, Germany, 8-11 November 2000.
  2. Ulich, Th., How accurately do we know the lengths of the sunspot cycles?, SPECIAL Workshop 2000, Katlenburg-Lindau, Germany, 8-11 November 2000.
  3. Ulich, Th., M. Füllekrug, J. Manninen, Large scale campaign for simultaneous measurements of ionospheric conductivity profiles by ELF receivers, incoherent scatter radars, and riometers in Northern Fenno-Scandia, SPECIAL Workshop 2000, Katlenburg-Lindau, Germany, 8-11 November 2000.
  4. Turunen, E., Th.Ulich, P. Verronen, E. Kyrölä, Effects of precipitating high energy particles in the mesosphere: Present and future applications of the Sodankylä Ion Chemistry Model, SPECIAL Workshop 2000, Katlenburg-Lindau, Germany, 8-11 November 2000.
  5. Ulich, Th., How do long-term trends depend on the choice of the underlying ionospheric model?, 33rd COSPAR Scientific Assembly, Warsaw, Poland, 16-23 July 2000.
  6. Ulich, Th., Do we have evidence of a "Greenhouse Effect in the Ionosphere"?, 33rd COSPAR Scientific Assembly, Warsaw, Poland, 16-23 July 2000.
  7. Ulich, Th., How do long-term trends in F2 layer peak height depend on the underlying ionospheric model?, 25th General Assembly of the European Geophysical Society, Nice, France, 25-29 April, 2000.
  8. Ulich, Th., J. Manninen, J. Kangas, E. Turunen, Monitoring of space weather effects by riometers in Northern Fenno-Scandia, 25th General Assembly of the European Geophysical Society, Nice, France, 25-29 April, 2000.
  9. Ulich, Th., J. Manninen, A. Karinen, Does the magnetosphere behave differently on weekends?, 25th General Assembly of the European Geophysical Society, Nice, France, 25-29 April, 2000.
  10. Ulich, Th., World-wide Trends in F2-Peak Height and their Dependence on the Choice of the Underlying Model, 34th Annual Meeting of the Finnish Physical Society, Espoo, Finland, 9-11 March, 2000.
  11. Verronen, P., E. Turunen, Th.Ulich, E. Kyrölä, Modeling the Effects of Energetic Particle Precipitation on Middle Atmosphere, 34th Annual Meeting of the Finnish Physical Society, Espoo, Finland, 9-11 March, 2000.

Abstracts 1999

  1. Shumilov, O. I., E. A. Kasatkina, O. M. Raspopov, J. Kangas, E. Turunen, Th.Ulich, Solar and Volcanic Forcing of Global Temperature Variations in the Past, 4th International Conference on Modelling of Global Climate Change and Variability, Hamburg, Germany, 13-17 September 1999.
  2. Ulich, Th., E. Turunen, P. Verronen, E. Kyrölä, Long-term Effects of the Variability of Solar UV Radiation on the Ion Chemistry of the Middle Atmosphere, 22nd General Assembly of the IUGG, Birmingham, UK, 18-30 July 1999.
  3. Turunen, E., Th.Ulich, P. Verronen, E. Kyrölä, Variations of Mesospheric Ion and Neutral Composition as Deduced from Imaging Riometer Data, 22nd General Assembly of the IUGG, Birmingham, UK, 18-30 July 1999.
  4. Verronen, P., E. Kyrölä, E. Turunen, Th.Ulich, Modeling the Effects of Solar Proton Events on Middle Atmosphere, 22nd General Assembly of the IUGG, Birmingham, UK, 18-30 July 1999.
  5. Ulich, Th., Global Change and the Upper Atmosphere, 19th Finnish Convention in Geophysics, Sodankylä, Finland, 14-15 June 1999.
  6. Ulich, Th., E. Turunen, J. Kultima, Onko kasvihuoneilmiö Sodankylän yllä?, 19th Finnish Convention in Geophysics, Sodankylä, Finland, 14-15 June 1999.
  7. Ulich, Th., E. Turunen, J. Kultima, Sodankylän geofysiikan observatorio, 19th Finnish Convention in Geophysics, Sodankylä, Finland, 14-15 June 1999.
  8. Ulich, Th., E. Turunen, T. Nygrén, K. Kaila, Response of ion and neutral composition of lower ionosphere during localised precipitation of auroral electrons, 24th General Assembly of the European Geophysical Society, The Hague, The Netherlands, 21-25 April 1999.
  9. Sedgemore-Schulthess, K. J. F., H. Rishbeth, Th.Ulich, Annual and semiannual variations in the height of the ionospheric F2-layer, 24th General Assembly of the European Geophysical Society, The Hague, The Netherlands, 21-25 April 1999.
  10. Ulich, Th., UV Radiation at Different Levels of Solar Activity, Arctic UV Research Workshop, Sodankylä, Finland, 25-26 March 1999.
  11. Turunen, E., Th.Ulich, Ionizing UV Radiation and Ion Chemistry of the Upper Atmosphere, Arctic UV Research Workshop, Sodankylä, Finland, 25-26 March 1999.
  12. Ulich, Th., E. Turunen, T. Nygrén, K. Kaila, Local Variations in E- and D-Region Ion Composition Due to Precipitation of Auroral Electrons, 33rd Annual Meeting of the Finnish Physical Society, Turku, Finland, 4-6 March 1999.
  13. Turunen, E., Th.Ulich, H. Matveinen, Applications of the Sodankylä Ion Chemistry Model, 33rd Annual Meeting of the Finnish Physical Society, Turku, Finland, 4-6 March, 1999.
  14. Verronen, P., E. Turunen, Th.Ulich, E. Kyrölä, New Possibilities for Studying Ozone Destruction by Odd Nitrogen in the Middle Atmosphere Through European Space Missions, 33rd Annual Meeting of the Finnish Physical Society, Turku, Finland, 4-6 March 1999.
  15. E. Turunen, Th.Ulich., A. Karinen, Global Change and Changing Upper Atmosphere -Observations, Long-term Changes and Trends in the Atmosphere, International Workshop, Indian Institute of Tropical Meteorology (IITM), Pune, India, 16-19 February 1999. (solicited)
  16. Verronen, P., E. Kyrölä, E. Turunen, Th. Ulich, New Possibilities for Studying Ozone Destruction by Odd Nitrogen in the Middle Atmosphere Through GOMOS and MIPAS Measurements, European Symposium on Atmospheric Measurements from Space (ESAMS), ESTEC, Noordwijk, The Netherlands, 18-22 January 1999.

Abstracts 1998

  1. Rasinkangas, R., K. Mursula, Th.Ulich, J. Kangas, The Online Space Physics Textbook of the University of Oulu, Fall Meeting of the American Geophysical Union 1998, San Francisco, USA, 6-10 December 1998.
  2. Verronen, P., E. Kyrölä, E. Turunen, Th.Ulich, New Possibilities for Studying Ozone Destruction by Odd Nitrogen in the Middle Atmosphere through European Space Missions, Fall Meeting of the American Geophysical Union 1998, San Francisco, USA, 6-10 December 1998.
  3. Verronen, P., E. Turunen, Th.Ulich, E. Kyrölä, Hiukkaspresipitaatio, Kemiallinen Aeronomia Mesosfäärissä ja Otsoni Stratosfäärissä, FinCOSPAR 1998, Kiljava, Finland, 14-15 September 1998.
  4. Ulich, Th., E. Turunen, The effective recombination rate in the lower ionosphere during localised precipitation of auroral electrons, 32nd Scientific Assembly of COSPAR, Nagoya, Japan, 12-19 July 1998.
  5. Ulich, Th., A. Karinen, E. Turunen, One Solar Cycle and a Half of EISCAT Operations: Did the Atmosphere Change During This Time?, 32nd Annual Meeting of the Finnish Physical Society, Tampere, Finland, 19-21 March 1998.

Abstracts 1997

  1. Ulich, Th., A. Karinen, E. Turunen, One Solar Cycle and a Half of EISCAT Observations, 31st ESLAB Symposium on Correlated Phenomena at the Sun, in the Heliosphere and in Geospace, Noordwijk, The Netherlands, 22-25 September 1997.
  2. Ulich, Th., A. Karinen, E. Turunen, Effects of Solar Cycle Variability seen in long-term EISCAT Radar Observations of the Lower Ionosphere, 2nd Workshop "Solar Activity Effects on the Middle Atmosphere", Prague, Czech Republic, 18-22 August 1997.
  3. Ulich, Th., E. Turunen, Long-term Behaviour of the Ionospheric F2 Layer Peak Height on a Global Scale, 8th Scientific Assembly of IAGA, Uppsala, Sweden, 4-15 August 1997.
  4. Turunen, E., Th.Ulich, Analysis of Localised Electron Precipitation Using a Detailed Ion Chemistry Model, 8th Scientific Assembly of IAGA, Uppsala, Sweden, 4-15 August 1997.
  5. del Pozo, C. F., E. Turunen, Th.Ulich, Negative Ions in the Auroral Mesosphere During Strong Ion Precipitation Events, 8th Scientific Assembly of IAGA, Uppsala, Sweden, 4-15 August 1997.
  6. del Pozo, C. F., I. W. McCrea, E. Turunen, Th.Ulich, J. K. Hargreaves, Ion-Chemistry in the D and E Regions from the Sodankylä Model and EISCAT, IRIS and Satellite Observations, 8th Scientific Assembly of IAGA, Uppsala, Sweden, 4-15 August 1997. (solicited)
  7. Turunen, E., Th.Ulich, Incoherent Scatter Spectrum in D Region - Is there a discrepancy between observations and theory?, 8th EISCAT International Workshop 1997, Leicester, UK, 23-27 June 1997.
  8. del Pozo, C. F., E. Turunen, Th.Ulich, Negative ion composition in the auroral mesosphere during a PCA event around sunset, 8th EISCAT International Workshop, Leicester University, Leicester, UK, 23-27 June 1997.
  9. Turunen, E., H. Matveinen, Th.Ulich, Sodankylä Ion Chemistry Model, IRI/COST Workshop, Kühlungsborn, Germany, 26-31 May 1997.
  10. Ulich, Th., E. Turunen, H. Ranta, Solar Variability and Cooling of the Upper Atmosphere as seen by long-term Measurement of Cosmic Radio Noise, 22nd General Assembly of the European Geophysical Society (Session ST16/OA24), Vienna, Austria, 21-25 April 1997.
  11. Ulich, Th., E. Turunen, H. Ranta, Upper Atmosphere (Greenhouse?) Cooling as seen in Riometer and Ionosonde Data, 31st Annual Meeting of the Finnish Physical Society, Helsinki, Finland, 13-15 March 1997.

Abstracts 1996

  1. Ulich, Th., E. Turunen, Is there observational evidence for greenhouse cooling at thermospheric altitudes?, Fall Meeting of the American Geophysical Union 1996, San Fransisco, USA, 15-20 December 1996.
  2. Ulich, Th., E. Turunen, Is there a Greenhouse Cooling in the Thermosphere?, Meeting of the Nordic Society for Space Research (NSSR), Oslo, Norway, 27-28 September 1996.
  3. Ulich, Th., Space Physics an Environmental Science?, Meeting of the Nordic Society of Space Research (NSSR), Oslo, Norway, 27-28 September 1996.
  4. Ulich, Th., E. Turunen, Is there a Greenhouse Cooling in the Upper Atmosphere?, International Conference of Physics Students ICPS, Szeged, Hungary, 18-24 August 1996.
  5. Ulich, Th., E. Turunen, Is there a Greenhouse Cooling in the Upper Atmosphere?, International Conference "Problems of Geocosmos", St. Petersburg, Russia, 17-23 June 1996.
  6. Ulich, Th., K. Mursula, The Length of the Sunspot Cycle Determined by Different Methods, 30th Annual Meeting of the Finnish Physical Society, Espoo, Finland, 21-23 March 1996.
  7. Ulich, Th., E. Turunen, Long-term Evolution of F2-Layer Peak Height at Various Locations: a Comparison, 30th Annual Meeting of the Finnish Physical Society, Espoo, Finland, 21-23 March 1996.
  8. Ulich, Th., E. Turunen, Greenhouse Cooling of the Upper Atmosphere Observed in High-Latitude Ionosonde Data, European Research Course on Atmospheres, Grenoble, France, 8 January - 7 February 1996.

Abstracts 1994

  1. Ulich, Th., Sun, Wind, and Polar Rain: The near Earth plasma environment, International Conference of Physics Students, St. Petersburg, Russia, August 1994.
  2. Rasinkangas, R., V. Sergeev, H. Singer, G. Kremser, A. Korth, T. Bösinger, K. Kaila, Th.Ulich, Current Disruption Signatures at Substorm Onset Observed by CRRES, International Conference on Substorms 2, Fairbanks, Alaska, March 1994.

If you can't convince them, confuse them.