Annika Seppala, Our people, Department of Physics

Associate Professor

Location: Room 415
Phone numbers: 9036 (Office)
64 3 479 9036 (Office Direct Dial)
Email: annika.seppala@otago.ac.nz

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Biography

Publications

Kessenich, H., Seppälä, A., & Rodger, C. J. (2023). Potential drivers of the recent large Antarctic ozone holes. Nature Communications, 14, 7259. doi: 10.1038/s41467-023-42637-0

Chapman-Smith, K., Seppälä, A., Rodger, C. J., Hendry, A., & Forsyth, C. (2023). Observed loss of polar mesospheric ozone following substorm-driven electron precipitation. Geophysical Research Letters, 50, e2023GL104860. doi: 10.1029/2023GL104860

Szeląg, M. E., Marsh, D. R., Verronen, P. T., Seppälä, A., & Kalakoski, N. (2022). Ozone impact from solar energetic particles cools the polar stratosphere. Nature Communications, 13, 6883. doi: 10.1038/s41467-022-34666-y

Maliniemi, V., Arsenovic, P., Seppälä, A., & Tyssøy, H. N. (2022). The influence of energetic particle precipitation on Antarctic stratospheric chlorine and ozone over the 20th century. Atmospheric Chemistry & Physics, 22(12), 8137-8149. doi: 10.5194/acp-22-8137-2022

Ward, W., Seppälä, A., Yiğit, E., Nakamura, T., Stolle, C., Laštovička, J., … Pallamraju, D. (2021). Role Of the Sun and the Middle atmosphere/thermosphere/ionosphere In Climate (ROSMIC): A retrospective and prospective view. Progress in Earth & Planetary Science, 8, 47. doi: 10.1186/s40645-021-00433-8

Hendry, A. T., Seppälä, A., Rodger, C. J., & Clilverd, M. A. (2021). Impact of EMIC-wave driven electron precipitation on the radiation belts and the atmosphere. Journal of Geophysical Research: Space Physics, 126, e2020JA028671. doi: 10.1029/2020JA028671

Daglis, I. A., Chang, L. C., Dasso, S., Gopalswamy, N., Khabarova, O. V., Kilpua, E., … Seppälä, A., … Zong, Q. (2021). Predictability of variable solar-terrestrial coupling. Annales Geophysicae, 39(6), 1013-1035. doi: 10.5194/angeo-39-1013-2021

Nordström, V. J., & Seppälä, A. (2021). Does the coupling of the semiannual oscillation with the quasi-biennial oscillation provide predictability of Antarctic sudden stratospheric warmings? Atmospheric Chemistry & Physics, 21, 12835-12853. doi: 10.5194/acp-21-12835-2021

Gordon, E. M., Seppälä, A., Funke, B., Tamminen, J., & Walker, K. A. (2021). Observational evidence of energetic particle precipitation NO_x (EPP-NO_x) interaction with chlorine curbing Antarctic ozone loss. Atmospheric Chemistry & Physics, 21, 2819-2836. doi: 10.5194/acp-21-2819-2021

Lee, J.-H., Jee, G., Kwak, Y.-S., Hwang, H., Seppälä, A., Song, I.-S., … Lee, D.-Y. (2021). Polar middle atmospheric responses to medium energy electron (MEE) precipitation using numerical model simulations. Atmosphere, 12, 133. doi: 10.3390/atmos12020133

Gordon, E. M., Seppälä, A., & Tamminen, J. (2020). Evidence for energetic particle precipitation and quasi-biennial oscillation modulations of the Antarctic NO₂ springtime stratospheric column from OMI observations. Atmospheric Chemistry & Physics, 20(11), 6259-6271. doi: 10.5194/acp-20-6259-2020

Kalakoski, N., Verronen, P. T., Seppälä, A. M., Szeląg, M. E., & Kero, A. (2020). Statistical response of middle atmosphere composition to solar proton events in WACCM-D simulations: The importance of lower ionospheric chemistry. Atmospheric Chemistry & Physics, 20(14), 8923-8938. doi: 10.5194/acp-20-8923-2020

Newnham, D. A., Clilverd, M. A., Kosch, M., Seppälä, A., & Verronen, P. T. (2019). Simulation study for ground-based Ku-band microwave observations of ozone and hydroxyl in the polar middle atmosphere. Atmospheric Measurement Techniques, 12(2), 1375-1392. doi: 10.5194/amt-12-1375-2019

Andersson, M. E., Verronen, P. T., Marsh, D. R., Seppälä, A., Päivärinta, S.-M., Rodger, C. J., … van de Kamp, M. (2018). Polar ozone response to energetic particle precipitation over decadal time scales: The role of medium-energy electrons. Journal of Geophysical Research: Atmospheres, 123(1), 607-622. doi: 10.1002/2017JD027605

Seppälä, A., Douma, E., Rodger, C. J., Verronen, P. T., Clilverd, M. A., & Bortnik, J. (2018). Relativistic electron microburst events: Modeling the atmospheric impact. Geophysical Research Letters, 45(2), 1141-1147. doi: 10.1002/2017GL075949

van de Kamp, M., Rodger, C. J., Seppälä, A., Clilverd, M. A., & Verronen, P. T. (2018). An updated model providing long-term data sets of energetic electron precipitation, including zonal dependence. Journal of Geophysical Research: Atmospheres, 123(17), 9891-9915. doi: 10.1029/2017JD028253

Newnham, D. A., Clilverd, M. A., Rodger, C. J., Hendrickx, K., Megner, L., Kavanagh, A. J., Seppälä, A., … Plane, J. M. C. (2018). Observations and modelling of increased nitric oxide in the Antarctic polar middle atmosphere associated with geomagnetic storm-driven energetic electron precipitation. Journal of Geophysical Research: Space Physics, 123, 6009-6025. doi: 10.1029/2018JA025507

Matthes, K., Funke, B., Andersson, M. E., Barnard, L., Beer, J., Charbonneau, P., … Rodger, C. J., … Seppälä, A., … Versick, S. (2017). Solar forcing for CMIP6 (v3.2). Geoscientific Model Development, 10, 2247-2302. doi: 10.5194/gmd-10-2247-2017

Funke, B., Ball, W., Bender, S., Gardini, A., Harvey, V. L., Lambert, A., … Seppälä, A., … Yushkov, V. (2017). HEPPA-II model–measurement intercomparison project: EPP indirect effects during the dynamically perturbed NH winter 2008–2009. Atmospheric Chemistry & Physics, 17(5), 3573-3604. doi: 10.5194/acp-17-3573-2017

van de Kamp, M., Seppälä, A., Clilverd, M. A., Rodger, C. J., Verronen, P. T., & Whittaker, I. C. (2016). A model providing long-term data sets of energetic electron precipitation during geomagnetic storms. Journal of Geophysical Research: Atmospheres, 121, 12520-12540. doi: 10.1002/2015JD024212

Clilverd, M. A., Rodger, C. J., Andersson, M. E., Seppälä, A., & Verronen, P. T. (2016). Linkages between the radiation belts, polar atmosphere and climate: Electron precipitation through wave particle interactions. In G. Balasis, I. A. Daglis & I. R. Mann (Eds.), Waves, particles, & storms in geospace: A complex interplay. (pp. 354-376). New York, NY: Oxford University Press.

Päivärinta, S.-M., Verronen, P. T., Funke, B., Gardini, A., Seppälä, A., & Andersson, M. E. (2016). Transport versus energetic particle precipitation: Northern polar stratospheric NO_x and ozone in January–March 2012. Journal of Geophysical Research: Atmospheres, 121(10), 6085-6100. doi: 10.1002/2015JD024217

Seppälä, A., Clilverd, M. A., Beharrell, M. J., Rodger, C. J., Verronen, P. T., Andersson, M. E., & Newnham, D. A. (2015). Substorm-induced energetic electron precipitation: Impact on atmospheric chemistry. Geophysical Research Letters, 42(19), 8172-8176. doi: 10.1002/2015GL065523

Murtagh, D., Seppälä, A., & Kyrölä, E. (2015). Satellite observations. In T. Dudok De Wit, I. Ermolli, M. Haberreiter, H. Kambezidis, M. M. Lam, J. Lilensten, … A. Seppälä, … Y. Yair (Eds.), Earth's climate response to a changing sun. (pp. 155-164). Les Ulis Cedex, France: EDP Sciences. doi: 10.1051/978-2-7598-1733-7.c118

Dudok De Wit, T., Ermolli, I., Haberreiter, M., Kambezidis, H., Lam, M. M., Lilensten, J., … Seppälä, A., … Yair, Y. (Eds.). (2015). Earth's climate response to a changing sun. Les Ulis Cedex, France: EDP Sciences, 345p. doi: 10.1051/978-2-7598-1733-7

Seppälä, A., Funke, B., & Verronen, P. T. (2015). Impact of energetic particle precipitation on atmospheric chemistry and climate. In T. Dudok De Wit, I. Ermolli, M. Haberreiter, H. Kambezidis, M. M. Lam, J. Lilensten, … A. Seppälä, … Y. Yair (Eds.), Earth's climate response to a changing sun. (pp. 267-272). Les Ulis Cedex, France: EDP Sciences. doi: 10.1051/978-2-7598-1733-7.c132

Funke, B., Seppälä, A., & von Clarmann, T. (2015). Uncertainties and unknowns in atmospheric observations: How do they affect the solar signal identification?. In T. Dudok De Wit, I. Ermolli, M. Haberreiter, H. Kambezidis, M. M. Lam, J. Lilensten, … A. Seppälä, … Y. Yair (Eds.), Earth's climate response to a changing sun. (pp. 171-178). Les Ulis Cedex, France: EDP Sciences. doi: 10.1051/978-2-7598-1733-7.c120

Andersson, M. E., Verronen, P. T., Rodger, C. J., Clilverd, M. A., & Seppälä, A. (2014). Missing driver in the Sun-Earth connection from energetic electron precipitation impacts mesopheric ozone. Nature Communications, 5, 5197. doi: 10.1038/ncomms6197

Seppälä, A., & Clilverd, M. A. (2014). Energetic particle forcing of the Northern Hemisphere winter stratosphere: Comparison to solar irradiance forcing. Frontiers in Physics, 2, 25. doi: 10.3389/fphy.2014.00025

Sinnhuber, M., Funke, B., von Clarmann, T., Lopez-Puertas, M., Stiller, G. P., & Seppälä, A. (2014). Variability of NO_x in the polar middle atmosphere from October 2003 to March 2004: Vertical transport vs. local production by energetic particles. Atmospheric Chemistry & Physics, 14(14), 7681-7692. doi: 10.5194/acp-14-7681-2014

Seppälä, A., Matthes, K., Randall, C. E., & Mironova, I. A. (2014). What is the solar influence on climate? Overview of activities during CAWSES-II. Progress in Earth & Planetary Science, 1, 24. doi: 10.1186/s40645-014-0024-3

Seppälä, A., Lu, H., Clilverd, M. A., & Rodger, C. J. (2013). Geomagnetic activity signatures in wintertime stratosphere wind, temperature, and wave response. Journal of Geophysical Research: Atmospheres, 118, 2169-2183. doi: 10.1002/jgrd.50236

Newnham, D. A., Espy, P. J., Clilverd, M. A., Rodger, C. J., Seppälä, A., Maxfield, D. J., … Horne, R. B. (2013). Observations of nitric oxide in the Antarctic middle atmosphere during recurrent geomagnetic storms. Journal of Geophysical Research: Space Physics, 118(12), 7874-7885. doi: 10.1002/2013JA019056

Päivärinta, S.-M., Seppälä, A., Andersson, M. E., Verronen, P. T., Thölix, L., & Kyrölä, E. (2013). Observed effects of solar proton events and sudden stratospheric warmings on odd nitrogen and ozone in the polarmiddle atmosphere. Journal of Geophysical Research: Atmospheres, 118, 6837-6848. doi: 10.1002/jgrd.50486

Maliniemi, V., Asikainen, T., Mursula, K., & Seppälä, A. (2013). QBO-dependent relation between electron precipitation and wintertime surface temperature. Journal of Geophysical Research: Atmospheres, 118(12), 6302-6310. doi: 10.1002/jgrd.50518

Kokorowski, M., Seppälä, A., Sample, J. G., Holzworth, R. H., McCarthy, M. P., Bering, E. A., & Turunen, E. (2012). Atmosphere-ionosphere conductivity enhancements during a hard solar energetic particle event. Journal of Geophysical Research: Space Physics, 117(A5), A05319. doi: 10.1029/2011JA017363

Newnham, D. A., Espy, P. J., Clilverd, M. A., Rodger, C. J., Seppälä, A., Maxfield, D. J., … Horne, R. B. (2011). Direct observations of nitric oxide produced by energetic electron precipitation into the Antarctic middle atmosphere. Geophysical Research Letters, 38, L20104. doi: 10.1029/2011gl048666

Clilverd, M. A., Rodger, C. J., Gamble, R. J., Ulich, T., Raita, T., Seppälä, A., … Thomson, N. R., … Parrot, M. (2010). Ground-based estimates of outer radiation belt energetic electron precipitation fluxes into the atmosphere. Journal of Geophysical Research, 115, A12304. doi: 10.1029/2010ja015638

Rodger, C. J., Clilverd, M. A., Seppälä, A., Thomson, N. R., Gamble, R. J., Parrot, M., … Ulich, T. (2010). Radiation belt electron precipitation due to geomagnetic storms: Significance to middle atmosphere ozone chemistry. Journal of Geophysical Research, 115, A11320. doi: 10.1029/2010JA015599

Clilverd, M. A., Seppälä, A., Rodger, C. J., Mlynczak, M. G., & Kozyra, J. U. (2009). Additional stratospheric NO_χ production by relativistic electron precipitation during the 2004 spring NO_χ descent event. Journal of Geophysical Research, 114, A04305. doi: 10.1029/2008ja013472

Seppälä, A., Randall, C. E., Clilverd, M. A., Rosanov, E., & Rodger, C. J. (2009). Geomagnetic activity and polar surface air temperature variability. Journal of Geophysical Research, 114, A10312. doi: 10.1029/2008ja014029

Turunen, E., Verronen, P. T., Seppälä, A., Rodger, C. J., Clilverd, M. A., Tamminen, J., … Ulich, T. (2009). Impact of different energies of precipitating particles on NO_χ generation in the middle and upper atmosphere during geomagnetic storms. Journal of Atmospheric & Solar-Terrestrial Physics, 71(10-11), 1176-1189. doi: 10.1016/j.jastp.2008.07.005

Clilverd, M. A., Rodger, C. J., Thomson, N. R., Brundell, J. B., Ulich, T., Lichtenberger, J., … Turunen, E. (2009). Remote sensing space weather events: Antarctic-Arctic Radiation-belt (Dynamic) Deposition-VLF Atmospheric Research Konsortium Network. Space Weather, 7, S04001. doi: 10.1029/2008sw000412

Rodger, C. J., Verronen, P. T., Clilverd, M. A., Seppälä, A., & Turunen, E. (2008). Atmospheric impact of the Carrington event solar protons. Journal of Geophysical Research, 113, D23302. doi: 10.1029/2008JD010702

Clilverd, M. A., Rodger, C. J., Brundell, J., Bähr, J., Cobbett, N., Moffat-Griffin, T., … Thomson, N. R., … Menk, F. W. (2008). Energetic electron precipitation during substorm injection events: High-latitude fluxes and an unexpected midlatitude signature. Journal of Geophysical Research, 113(10), A10311. doi: 10.1029/2008JA013220

Rodger, C. J., Raita, T., Clilverd, M. A., Seppälä, A., Dietrich, S., Thomson, N. R., & Ulich, T. (2008). Observations of relativistic electron precipitation from the radiation belts driven by EMIC waves. Geophysical Research Letters, 35, L16106. doi: 10.1029/2008GL034804

Rodger, C. J., Seppälä, A., & Clilverd, M. A. (2008). Significance of transient luminous events to neutral chemistry: Experimental measurements. Geophysical Research Letters, 35(7), L07803. doi: 10.1029/2008GL033221

Seppälä, A., Clilverd, M. A., Rodger, C. J., Verronen, P. T., & Turunen, E. (2008). The effects of hard-spectra solar proton events on the middle atmosphere. Journal of Geophysical Research, 113(11), A11311. doi: 10.1029/2008JA013517

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

Rodger, C. J., Clilverd, M. A., Thomson, N. R., Gamble, R. J., Seppälä, A., Turunen, E., … Berthelier, J.-J. (2007). Radiation belt electron precipitation into the atmosphere: Recovery from a geomagnetic storm. Journal of Geophysical Research, 112, A11307. doi: 10.1029/2007JA012383

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

Seppälä, A., Verronen, P. T., Sofieva, V. F., Tamminen, J., Kyrölä, E., Rodger, C. J., & Clilverd, M. A. (2006). Destruction of the tertiary ozone maximum during a solar proton event. Geophysical Research Letters, 33, L07804. doi: 10.1029/2005GL025571

Clilverd, M. A., Seppälä, A., Rodger, C. J., Verronen, P. T., & Thomson, N. R. (2006). Ionospheric evidence of thermosphere-to-stratosphere descent of polar NO_x. Geophysical Research Letters, 33, L19811. doi: 10.1029/2006GL026727

Clilverd, M. A., Seppälä, A., Rodger, C. J., Thomson, N. R., Verronen, P. T., Turunen, E., … Steinbach, P. (2006). Modeling polar ionospheric effects during the October-November 2003 solar proton events. Radio Science, 41, RS2001.

Verronen, P. T., Seppälä, A., Clilverd, M. A., Rodger, C. J., Kyrölä, E., Enell, C.-F., … Turunen, E. (2005). Diurnal variation of ozone depletion during the October-November 2003 solar proton events. Journal of Geophysical Research, 110, A09S32.

Clilverd, M. A., Rodger, C. J., Ulich, T., Seppälä, A., Turunen, E., Botman, A., & Thomson, N. R. (2005). Modeling a large solar proton event in the southern polar atmosphere. Journal of Geophysical Research, 110, A09307.

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