Associate Professor Annika Seppälä

2026

Journal - Research Article

Nesse, H., Asikainen, T., DeCotte, M., Funke, B., Harvey, V. L., Jia, J., … Seppälä, A., … Vokhmyanin, M. (2026). Why is energetic particle precipitation important for climate research and seasonal forecasting? Surveys in Geophysics. Advance online publication. doi: 10.1007/s10712-026-09946-7

2025

Chapter in Book - Research

Seppälä, A. (2025). Effects of energetic particle precipitation on atmospheric chemistry and climate. In Reference module in earth systems and environmental sciences. Elsevier. doi: 10.1016/B978-0-323-96026-7.00206-X

Journal - Research Article

Kessenich, H. E., Seppälä, A., Smale, D., Rodger, C. J., & Weber, M. (2025). Quantifying the contribution of transport to Antarctic springtime ozone column variability. Atmospheric Chemistry & Physics, 25, 17527-17552. doi: 10.5194/acp-25-17527-2025

Seppälä, A., Kalakoski, N., Verronen, P. T., Marsh, D. R., Karpechko, A. Y., & Szelag, M. (2025). Polar mesospheric ozone loss initiates downward coupling of solar signal in the Northern Hemisphere. Nature Communications, 16, 748. doi: 10.1038/s41467-025-55966-z

Conference Contribution - Published proceedings: Abstract

Dudok de Wit, T., Funke, B., Haberreiter, M., Marsh, D., Ermolli, I., Kinnison, D., … Seppälä, A., … Verronen, P. (2025). Solar forcing for CMIP7: Making of future scenarios. Proceedings of the European Geosciences Union (EGU) General Assembly. EGU25-17597. doi: 10.5194/egusphere-egu25-17597

Funke, B., Dudok de Wit, T., Haberreiter, M., Marsh, D., Ermolli, I., Kinnison, D., … Seppälä, A., … Verronen, P. (2025). Solar forcing for CMIP7. Proceedings of the European Geosciences Union (EGU) General Assembly. EGU25-15908. doi: 10.5194/egusphere-egu25-15908

Haberreiter, M., the CMIP7 Solar Forcing Validation Team, including Seppälä, A. (2025). CMIP7 solar forcing validation. Proceedings of the European Geosciences Union (EGU) General Assembly. EGU25-20295. doi: https://doi.org/10.5194/egusphere-egu25-20295

Seppälä, A. (2025). Dynamical coupling in the atmosphere: Surprising large scale connections revealed by solar forcing [Invited]. Proceedings of the 13th Fluids in New Zealand (FiNZ) Workshop. (pp. 11). Retrieved from https://www.otago.ac.nz/news/events/fluids-in-new-zealand-2025

Seppälä, A. (2025). Dynamical impacts of energetic particle precipitation [Keynote]. AGU Chapman Conference on Particle Precipitation: Drivers, Properties, and Impacts on Atmosphere, Ionosphere, Magnetosphere Coupling. Retrieved from https://www.agu.org/chapman-particle-precipitation

2024

Journal - Research Article

Funke, B., Dudok de Wit, T., Ermolli, I., Haberreiter, M., Kinnison, D., Marsh, D., … Seppälä, A., … Usoskin, I. (2024). Towards the definition of a solar forcing dataset for CMIP7 [Review and perspective]. Geoscientific Model Development, 17, 1217-1227. doi: 10.5194/gmd-17-1217-2024

Conference Contribution - Published proceedings: Abstract

Seppälä, A. (2024). Photonic radiometers for next-generation stratospheric ozone detection. Proceedings of the Meteorological Society of New Zealand Annual Conference and AGM. Retrieved from https://www.metsoc.org.nz

Funke, B., Dudok de Wit, T., Haberreiter, M., Marsh, D., Ermolli, I., Kinnison, D., … Seppälä, A., … Verronen, P. (2024). Solar forcing recommendations for CMIP7. Proceedings of the 9th International HEPPA-SOLARIS Meeting. (pp. 30-31). Retrieved from https://events.hifis.net/event/1512/

Kalakoski, N., Karpechko, A., Seppälä, A., Marsh, D., Szelag, M., & Verronen, P. (2024). Polar mesospheric ozone loss initiates downward coupling of solar signal. Proceedings of the 9th International HEPPA-SOLARIS Meeting. (pp. 5). Retrieved from https://events.hifis.net/event/1512/

2023

Journal - Research Article

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

Conference Contribution - Published proceedings: Abstract

Kessenich, H., Seppälä, A., & Rodger, C. (2023). Unravelling recent trends in Antarctic ozone. Proceedings of the Graduate Research Student Symposium. (pp. 17-18). Retrieved from https://www.otago.ac.nz/graduate-research

Kessenich, H., Suresh, M. I., Platt, L., Vogt, D. W., Sedlmeir, F., Schwefel, H. G. L., & Seppala, A. (2023). Photonic radiometers for next-generation stratospheric ozone detection. Proceedings of the American Geophysical Union (AGU) Fall Meeting: Wide. Open. Science. A41I-2732. Retrieved from https://www.agu.org

Kessenich, H., Seppala, A., & Rodger, C. J. (2023). Unravelling recent trends in Antarctic ozone. Proceedings of the American Geophysical Union (AGU) Fall Meeting: Wide. Open. Science. A21I-2399. Retrieved from https://www.agu.org

Szelag, M., Marsh, D., Verronen, P., Seppälä, A., & Kalakoski, N. (2023). Ozone impact from solar energetic particles cools the polar stratosphere. Proceedings of the 28th General Assembly of the International Union of Geodesy and Geophysics (IUGG). doi: 10.57757/IUGG23-1476

Seppälä, A., Chapman-Smith, K., Rodger, C. J., Hendry, A., & Forsyth, C. (2023). Evidence of significant electron precipitation and mesospheric ozone loss from substorms [Invited]. Proceedings of the 28th General Assembly of the International Union of Geodesy and Geophysics (IUGG). doi: 10.57757/IUGG23-1351

Dudok De Wit, T., Ermolli, I., Funke, B., Haberreiter, M., Kinnison, D., Marsh, D., … Seppälä, A., … Usoskin, I. (2023). Preparing a new solar forcing dataset running from 1850 - 2300. Proceedings of the 19th European Space Weather Week (ESWW). 1108. Retrieved from https://esww2023.org

Suresh, M., Vogt, D., Platt, L., Kessenich, H., Seppälä, A., & Schwefel, H. (2023). GaAs resonators for photonic radiometers\n. Proceedings of the Te Whai Ao Dodd-Walls Centre (DWC) Symposium. (pp. 26). Retrieved from https://www.otago.ac.nz/dodd-walls

Conference Contribution - Verbal presentation and other Conference outputs

Kessenich, H., Seppala, A., & Rodger, C. (2023, June). Improving Antarctic ozone prediction in a changing climate. Verbal presentation at the Australasian Leadership Computing Symposium (ALCS), Canberra, Australia.

2022

Journal - Research Article

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

Conference Contribution - Published proceedings: Abstract

Seppala, A., & Nordstrom, V. (2022). Does the coupling of the semiannual oscillation with the quasi-biennial oscillation provide predictability of Antarctic sudden stratospheric warmings? Proceedings of the 13th International Conference on Southern Hemisphere Meteorology and Oceanography (ICSHMO). Retrieved from https://confer.eventsair.com/icshmo-2022

Other Research Output

Seppälä, A. (2022, March). Thirst for knowledge: Explosions in the sun: From aurora to ozone. Ombrellos Kitchen and Bar, Dunedin, New Zealand. [Public Seminar].

2021

Journal - Research Article

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

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

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

Journal - Research Other

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

Conference Contribution - Published proceedings: Abstract

Seppälä, A., & Nordstrom, V. (2021). Does the coupling of semiannual oscillation with the quasi-biennial oscillation provide predictability of Antarctic sudden stratospheric warmings? Proceedings of the American Geophysical Union (AGU) Fall Meeting. A15M-1823. Retrieved from https://www.agu.org/Fall-Meeting

Chapman-Smith, K., Seppälä, A., Rodger, C. J., Hendry, A., & Forsyth, C. (2021). Observational evidence of polar ozone loss following substorm events. Proceedings of the American Geophysical Union (AGU) Fall Meeting. A25A-07. Retrieved from https://www.agu.org/Fall-Meeting

Nordström, V., & Seppälä, A. (2021). SAO-QBO coupling before the 2019 and 2002 southern sudden stratospheric warmings. Proceedings of the European Geosciences Union (EGU) General Assembly. EGU21-9318. doi: 10.5194/egusphere-egu21-9318

Seppälä, A., Gordon, E., Funke, B., Tamminen, J., & Walker, K. (2021). Observational evidence of solar activity interaction with chlorine chemistry curbing Antarctic ozone loss. Proceedings of the EGU General Assembly. doi: 10.5194/egusphere-egu21-157

Gordon, E., Seppälä, A., Funke, B., Tamminen, J., & Walker, K. A. (2021). Observational evidence of solar activity interaction with chlorine chemistry curbing Antarctic ozone loss. Proceedings of the New Zealand Antarctic Science Conference: Connecting through change. (pp. 87-88). Retrieved from https://www.antarcticanz.govt.nz/nzasc21

Nordstrom, V., & Seppälä, A. (2021). Is the early winter SAO-QBO coupling a key physical driver of Antarctic Sudden Stratospheric Warmings? Proceedings of the New Zealand Antarctic Science Conference: Connecting through change. (pp. 86-87). Retrieved from https://www.antarcticanz.govt.nz/nzasc21

2020

Journal - Research Article

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

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

2019

Journal - Research Article

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

Conference Contribution - Published proceedings: Abstract

Seppälä, A., Kalakoski, N., Verronen, P. T., Marsh, D. R., & Karpechko, A. (2019). Downward coupling of energetic particle precipitation driven polar mesospheric ozone loss. Proceedings of the American Geophysical Union (AGU) Fall Meeting. A34G-04. Retrieved from https://agu.confex.com/

Gordon, E., & Seppälä, A. (2019). Modulation of springtime polar statospheric constituents by energetic particle precipitation as detected by Aura OMI and MLS. Proceedings of the American Geophysical Union (AGU) Fall Meeting. A51P-2645. Retrieved from https://agu.confex.com/

Andersson, M., Marsh, D., Verronen, P., Seppälä, A., & Kalakoski, N. (2019). Energetic particle precipitation impact on stratospheric dynamics in the Southern Hemisphere. Proceedings of the 27th General Assembly of the International Union of Geodesy and Geophysics (IUGG). Retrieved from http://www.iugg2019montreal.com

Seppälä, A., Kalakoski, N., Verronen, P., Marsh, D., & Karpechko, A. (2019). Downward coupling of energetic particle precipitation driven polar mesopheric ozone loss. Proceedings of the 27th General Assembly of the International Union of Geodesy and Geophysics (IUGG). Retrieved from http://www.iugg2019montreal.com

Seppälä, A., Kalakoski, N., Verronen, P., Marsh, D., & Karpechko, A. (2019). Mechanisms linking solar forcing, polar ozone and regional scale climate variability. Proceedings of the New Zealand Antarctic Science Conference: Our future in focus. (pp. 53). New Zealand Antarctic Research Institute. Retrieved from https://www.antarcticanz.govt.nz/science/new-zealand-antarctic-science-conference-2019

Gordon, E., & Seppälä, A. (2019). Solar influence: Direct and indirect effects on polar stratospheric chemistry from 2005-2017. Proceedings of the New Zealand Antarctic Science Conference: Our future in focus. (pp. 46-47). New Zealand Antarctic Research Institute. Retrieved from https://www.antarcticanz.govt.nz/science/new-zealand-antarctic-science-conference-2019

2018

Journal - Research Article

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

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

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

Conference Contribution - Published proceedings: Abstract

Clilverd, M., Rodger, C., Van De Kamp, M., Thomson, N., Seppälä, A., & Verronen, P. (2018). Electron precipitation from the outer radiation belt during the St Patrick's Day storm. Proceedings of the 8th biennial VLF/ELF Remote Sensing of Ionospheres and Magnetospheres (VERSIM) Workshop. Retrieved from http://pgi.ru/conf

Seppälä, A., Douma, E., Rodger, C., Verronen, P., Clilverd, M., & Bortnik, J. (2018). Relativistic electron microburst events: Modeling the atmospheric impact. Proceedings of the Asia Oceania Geosciences Society (AOGS) 15th Annual Meeting. ST10-A005. Retrieved from http://asiaoceania.org

Clilverd, M., Rodger, C., Kamp, M., Seppälä, A., & Verronen, P. (2018). Electron precipitation from the outer radiation belt during the St Patrick's Day storm. Proceedings of the Scientific Committee on Solar Terrestrial Physics (SCOSTEP) Symposium. (pp. 24). Retrieved from http://www.scostepevents.ca

Verronen, P. T., Andersson, M. E., Kalakoski, N., van de Kamp, M., Marsh, D. R., Seppälä, A., Rodger, C. J., & Clilverd, M. A. (2018). Connection between descending odd nitrogen, stratospheric ozone, shortwave heating, and temperature from 147 years of WACCM simulations. Proceedings of the 7th International High-Energy Particle Precipitation in the Atmosphere (HEPPA) and Solar Influences for Stratospheric Processes and their Role in Climate (SPARC/SOLARIS) Workshop. (pp. 34). Retrieved from www.cpe.vt.edu/heppa.solaris.2018

van de Kamp, M., Rodger, C. J., Seppälä, A., Clilverd, M., & Verronen, P. T. (2018). A model providing long-term datasets of energetic electron precipitation including zonal dependence. Proceedings of the 7th International High-Energy Particle Precipitation in the Atmosphere (HEPPA) and Solar Influences for Stratospheric Processes and their Role in Climate (SPARC/SOLARIS) Workshop. (pp. 32). Retrieved from www.cpe.vt.edu/heppa.solaris.2018

Douma, E., Seppälä, A., Rodger, C. J., Verronen, P. T., Clilverd, M., & Bortnik, J. (2018). Relativistic electron microburst events: From occurrence to atmospheric impact. Proceedings of the 42nd Committee on Space Research (COSPAR) Scientific Assembly. (pp. 866). Retrieved from http://cospar2018.org

Van De Kamp, M., Rodger, C. J., Seppälä, A., Clilverd, M., & Verronen, P. T. (2018). A model providing long-term datasets of energetic electron precipitation including zonal dependence. Proceedings of the 42nd Committee on Space Research (COSPAR) Scientific Assembly. (pp. 865). Retrieved from http://cospar2018.org

Verronen, P. T., Andersson, M., Marsh, D., Seppälä, A., Rodger, C. J., Clilverd, M., … Van De Kamp, M. (2018). Impact of medium-energy electron precipitation on polar ozone over decadal time scales. Proceedings of the 42nd Committee on Space Research (COSPAR) Scientific Assembly. (pp. 864). Retrieved from http://cospar2018.org

2017

Journal - Research Article

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

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

Conference Contribution - Published proceedings: Abstract

Clilverd, M., Rodger, C., Van De Kamp, M., Thomson, N., Seppälä, A., & Verronen, P. (2017). Electron precipitation from the outer radiation belt during the St Patrick’s Day storm. Proceedings of the IAPSO-IAMAS-IAGA Joint Assembly. (pp. 791). Retrieved from http://iapso.iugg.org

Clilverd, M., Seppälä, A., Rodger, C., Verronen, P., & Andersson, M. (2017). Geomagnetic activity and polar surface air temperature variability: Energetic particle precipitation coupling between the magnetosphere, ionosphere and the atmosphere. Proceedings of the IAPSO-IAMAS-IAGA Joint Assembly. (pp. 737). Retrieved from http://iapso.iugg.org

Seppälä, A., Rodger, C., Clilverd, M., Verronen, P., & Andersson, M. (2017). Solar influence on regional climate variability in the Southern polar region. Proceedings of the New Zealand Antarctic Science Conference: Challenging science in a challenging environment. (pp. 58). New Zealand Antarctic Research Institute. Retrieved from https://antarctic2017.org

Rodger, C. J., Clilverd, M. A., van de Kamp, M., Seppälä, A., & Verronen, P. (2017). Putting energetic electron precipitation from space into climate models: Step 1: How to describe the precipitation. Proceedings of the New Zealand Antarctic Science Conference: Challenging science in a challenging environment. (pp. 56). New Zealand Antarctic Research Institute. Retrieved from https://antarctic2017.org

Conference Contribution - Verbal presentation and other Conference outputs

Seppälä, A., Rodger, C. J., Clilverd, M. A., Verronen, P. T., & Andersson, M. E. (2017, November). Solar influence on regional climate variability in the Southern polar region. Verbal presentation at the Meteorological Society of New Zealand Annual Conference, Dunedin, New Zealand.

Seppälä, A., & Rodger, C. J. (2017, July). The sun: Influencing the earth from the aurora to ozone loss and regional climate. Verbal presentation at the New Zealand Institute of Physics (NZIP) Conference, Dunedin, New Zealand.

2016

Chapter in Book - Research

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.

Journal - Research Article

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

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

Conference Contribution - Published proceedings: Abstract

Newnham, D., Clilverd, M. A., Horne, R. B., Rodger, C. J., Seppälä, A., Verronen, P. T., … Plane, J. M. C. (2016). Ground-based observations and atmospheric modelling of energetic electron precipitation effects on Antarctic mesospheric chemistry. Proceedings of the American Geophysical Union (AGU) Fall Meeting. SA54A-07. Retrieved from https://agu.confex.com/agu/fm16/meetingapp.cgi/Paper/157767

van de Kamp, M., Seppälä, A., Verronen, P. T., Clilverd, M. A., Rodger, C. J., & Whittaker, I. C. (2016). A model providing long-term datasets of energetic electron precipitation during geomagnetic storms. In P. T. Verronen (Ed.), Proceedings of the 6th International High-Energy Particle Precipitation in the Atmosphere (HEPPA) and Solar Influences for Stratospheric Processes and their Role in Climate (SPARC/SOLARIS) Workshop. (pp. 75). Helsinki, Finland: Finnish Meteorological Institute. Retrieved from http://heppa-solaris-2016.fmi.fi/program.html

Newnham, D., Clilverd, M., Horne, R. B., Rodger, C. J., Seppälä, A., Verronen, P. T., … Plane, J. M. C. (2016). Mesopheric nitric oxide production by medium energy electrons above Halley station, Antarctica. In P. T. Verronen (Ed.), Proceedings of the 6th International High-Energy Particle Precipitation in the Atmosphere (HEPPA) and Solar Influences for Stratospheric Processes and their Role in Climate (SPARC/SOLARIS) Workshop. (pp. 45). Helsinki, Finland: Finnish Meteorological Institute. Retrieved from http://heppa-solaris-2016.fmi.fi/program.html

Clilverd, M., Newnham, D., Seppälä, A., Verronen, P., Andersson, M., Beharrell, M., & Rodger, C. (2016). Substorm-induced energetic electron precipitation: Impact on atmospheric chemistry. In P. T. Verronen (Ed.), Proceedings of the 6th International High-Energy Particle Precipitation in the Atmosphere (HEPPA) and Solar Influences for Stratospheric Processes and their Role in Climate (SPARC/SOLARIS) Workshop. (pp. 30). Helsinki, Finland: Finnish Meteorological Institute. Retrieved from http://heppa-solaris-2016.fmi.fi/program.html

Clilverd, M., Seppälä, A., Rodger, C., Verronen, P., & Andersson, M. (2016). Space weather and polar surface temperature variability: An atmospheric interconnection with energetic particle processes in the magnetosphere. Proceedings of the XXXIV Scientific Committee on Antarctic Research (SCAR) 7th Open Science Conference: Antarctic in the Global Earth System: From the Poles to the Tropics. (pp. 283). [Abstract]

2015

Edited Book - Research

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

Chapter in Book - Research

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

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

Journal - Research Article

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

Journal - Research Other

Seppälä, A., & Clilverd, M. A. (2015). Response: Commentary: Energetic particle forcing of the Northern Hemisphere winter stratosphere: Comparison to solar irradiance forcing. Frontiers in Physics, 3, 69. doi: 10.3389/fphy.2015.00069

Conference Contribution - Published proceedings: Abstract

Luebken, F. J., Ward, W., & Seppälä, A. (2015). ROSMIC: A project within SCOSTEP's new VarSITI program. Proceedings of the 26th International Union of Geodesy and Geophysics (IUGG) General Assembly: Earth and Environmental Sciences for Future Generations. Retrieved from http://www.iugg.org/assemblies/2015prague/

Funke, B., Ball, W., Rozanov, E., López-Puertas, M., Gardini, A., Andersson, M. E., … Seppälä, A., … Perot, K. (2015). HEPPA-II model-observation intercomparison project: EPP indirect effects during the dynamically perturbed NH winter 2008/2009. Proceedings of the 26th International Union of Geodesy and Geophysics (IUGG) General Assembly: Earth and Environmental Sciences for Future Generations. Retrieved from http://www.iugg.org/assemblies/2015prague/

Päivärinta, S. M., Verronen, P. T., Seppälä, A., Andersson, M. E., Thölix, L., & Kyrölä, E. (2015). Solar proton events and sudden stratospheric warmings: Effects on odd nitrogen and ozone in the polar middle atmosphere. Proceedings of the 26th International Union of Geodesy and Geophysics (IUGG) General Assembly: Earth and Environmental Sciences for Future Generations. Retrieved from http://www.iugg.org/assemblies/2015prague/

Kalakoski, N., Seppälä, A., Andersson, M. E., Päivärinta, S. M., & Verronen, P. T. (2015). Dynamical effects of EEP induced polar ozone loss in WACCM. Proceedings of the 26th International Union of Geodesy and Geophysics (IUGG) General Assembly: Earth and Environmental Sciences for Future Generations. Retrieved from http://www.iugg.org/assemblies/2015prague/

Seppälä, A., Andersson, M. E., Clilverd, M. A., Lu, H., Päivärinta, S. M., Rodger, C. J., … Kalakoski, N. (2015). Middle atmosphere chemical and dynamical variability arising from energetic particle precipitation. Proceedings of the 26th International Union of Geodesy and Geophysics (IUGG) General Assembly: Earth and Environmental Sciences for Future Generations. Retrieved from http://www.iugg2015prague.com/

Andersson, M., Verronen, P. T., Rodger, C. J., Clilverd, M. A., Seppälä, A., Wang, S., & Carson, B. R. (2015). The effects of energetic electron precipitation seen in mesopheric hydroxyl and ozone. Proceedings of the 26th International Union of Geodesy and Geophysics (IUGG) General Assembly: Earth and Environmental Sciences for Future Generations. Retrieved from http://www.iugg2015prague.com/

Seppälä, A., Andersson, M. E., Clilverd, M. A., Lu, H., Rodger, C. J., & Verronen, P. T. (2015). Impact of energetic particles on middle atmosphere chemistry and coupling to dynamics: Contrasting to solar irradiance. Proceedings of the 26th International Union of Geodesy and Geophysics (IUGG) General Assembly: Earth and Environmental Sciences for Future Generations. Retrieved from http://www.iugg2015prague.com/

Clilverd, M. A., Rodger, C. J., Lu, H., & Seppälä, A. (2015). What are the magnetospheric drivers of the observed coupling of geomagnetic activity to the atmosphere? Proceedings of the Unsolved Problems of Magnetospheric Physics Workshop. Retrieved from http://spacescience.org/upmpw/

Conference Contribution - Poster Presentation (not in published proceedings)

Andersson, M. E., Verronen, P. T., Rodger, C. J., Clilverd, M. A., Seppälä, A., Wang, S., & Carson, B. R. (2015, June). Mesospheric hydroxyl and ozone response to energetic electron precipitation over the solar cycle. Poster session presented at the Advances in Atmospheric Science and Applications (ATMOS), Heraklion, Greece.

Conference Contribution - Verbal presentation and other Conference outputs

Seppälä, A., & Clilverd, M. A. (2015, March). Energetic particle forcing of the Northern Hemisphere winter stratosphere: Comparison to solar irradiance forcing. Verbal presentation at the Sun-Climate Connections Conference, Kiel, Germany.

Andersson, M. E., Verronen, P. T., Rodger, C. J., Clilverd, M. A., Seppälä, A., Wang, S., & Carson, B. R. (2015, September). Solar-cycle effect of energetic electron participation seen in mesospheric ozone (solicited). Invited presentation at the 15th European Meteorological Society (EMS) & 12th European Conference on Applications of Meteorology (ECAM), Sofia, Bulgaria.

2014

Journal - Research Article

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., & 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

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

Conference Contribution - Published proceedings: Abstract

Seppälä, A., Lübken, F.-J., & Ward, W. (2014). ROSMIC: Role of the sun and the middle atmosphere/thermosphere/ionosphere in climate. Proceedings of the 5th International High-Energy Particle Precipitation in the Atmosphere (HEPPA) Workshop in conjunction with Solar Influences for Stratospheric Processes and their Role in Climate (SPARC/SOLARIS) Conference. (pp. 73). Retrieved from https://www.imk-asf.kit.edu/english/HEPPA_SOLARIS_2014.php

Päivärinta, S.-M., Seppälä, A., Andersson, M. E., Verronen, P. T., Thölix, L., & Kyrölä, E. (2014). Observed effects of solar proton events and sudden stratospheric warmings on odd nitrogen and ozone in the polar middle atmosphere. Proceedings of the 5th International High-Energy Particle Precipitation in the Atmosphere (HEPPA) Workshop in conjunction with Solar Influences for Stratospheric Processes and their Role in Climate (SPARC/SOLARIS) Conference. (pp. 63). Retrieved from https://www.imk-asf.kit.edu/english/HEPPA_SOLARIS_2014.php

Kalakoski, N., Seppälä, A., Andersson, M., Päivärinta, S.-M., & Verronen, P. (2014). Impacts of using different meteorological datasets for nudging WACCM. Proceedings of the 5th International High-Energy Particle Precipitation in the Atmosphere (HEPPA) Workshop in conjunction with Solar Influences for Stratospheric Processes and their Role in Climate (SPARC/SOLARIS) Conference. (pp. 36). Retrieved from https://www.imk-asf.kit.edu/english/HEPPA_SOLARIS_2014.php

Andersson, M. E., Verronen, P. T., Rodger, C. J., Clilverd, M. A., Wang, S., Seppälä, A., & Carson, B. R. (2014). The effects of precipitating radiation belt electrons on the mesospheric hydroxyl and ozone. Proceedings of the 5th International High-Energy Particle Precipitation in the Atmosphere (HEPPA) Workshop in conjunction with Solar Influences for Stratospheric Processes and their Role in Climate (SPARC/SOLARIS) Conference. (pp. 11). Retrieved from https://www.imk-asf.kit.edu/english/HEPPA_SOLARIS_2014.php

Marsh, D. R., Clilverd, M. A., Funke, B., Jackman, C. H., Nieder, H., Peck, E., … Rodger, C., Seppälä, A., … Wissing, J. M. (2014). Update on the International ISSI Team: Quantifying hemispheric differences in particle forcing effects on stratospheric ozone. Proceedings of the 5th International High-Energy Particle Precipitation in the Atmosphere (HEPPA) Workshop in conjunction with Solar Influences for Stratospheric Processes and their Role in Climate (SPARC/SOLARIS) Conference. (pp. 48). Retrieved from https://www.imk-asf.kit.edu/english/HEPPA_SOLARIS_2014.php

Seppälä, A., & Clilverd, M. (2014). Energetic particle forcing of the Northern Hemisphere winter stratosphere: Comparison to solar irradiance forcing. Proceedings of the 5th International High-Energy Particle Precipitation in the Atmosphere (HEPPA) Workshop in conjunction with Solar Influences for Stratospheric Processes and their Role in Climate (SPARC/SOLARIS) Conference. (pp. 72). Retrieved from https://www.imk-asf.kit.edu/english/HEPPA_SOLARIS_2014.php

Seppälä, A., Lu, H., Clilverd, M. A., & Rodger, C. J. (2014). Geomagnetic activity signatures in wintertime stratosphere. Proceedings of the SPARC General Assembly. Retrieved from http://www.sparc-climate.org/meetings/general-assemblies

Andersson, M. E., Verronen, P. T., Rodger, C. J., Clilverd, M. A., & Seppälä, A. (2014). Mesospheric ozone loss caused by energetic electron precipitation. Proceedings of the SPARC General Assembly. Retrieved from http://www.sparc-climate.org/meetings/general-assemblies

Newnham, D., Clilverd, M., Horne, R., Rodger, C., Seppälä, A., Verronen, P., … Plane, J. (2014). Observations of mesospheric nitric oxide and ozone variability above Halley station, Antarctica. Proceedings of the American Geophysical Union (AGU) 47th Annual Fall Meeting. Retrieved from http://fallmeeting.agu.org/2014/

Seppälä, A., Verronen, P. T., Andersson, M. E., Clilverd, M. A., & Rodger, C. J. (2014). Impact of energetic particle precipitation on polar winter atmosphere and climate. Proceedings of the 6th VLF/ELF Remote Sensing of Ionospheres and Magnetospheres (VERSIM) Workshop. (pp. 36). Retrieved from http://www.physics.otago.ac.nz/versim/VERSIM_workshop_Dunedin_2014.html

Conference Contribution - Verbal presentation and other Conference outputs

Seppälä, A., & Funke, B. (2014, October). Energetic particles, atmosphere and regional climate. Invited presentation at the 13th Quadrennial Solar-Terrestrial Physics Symposium (STP13), Xi'An, China.

2013

Journal - Research Article

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

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

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

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

Conference Contribution - Published proceedings: Abstract

Seppälä, A. (2013). Solar storms and energetic particles: Shaking the earth’s atmosphere. Proceedings of the European Week of Astronomy and Space Science (EWASS). (pp. 10). Retrieved from http://www.astro.utu.fi/EWASS2013

Conference Contribution - Verbal presentation and other Conference outputs

Seppälä, A., Lu, H., Clilverd, M. A., & Rodger, C. J. (2013, November). Geomagnetic activity signatures in wintertime stratosphere. Verbal presentation at the International CAWSES-II Symposium, Nagoya, Japan.

Matthes, K., Randall, C., & Seppälä, A. (2013, November). Overview of CAWSES-TG1 activities: What are the solar influences on climate? Invited presentation at the International CAWSES-II Symposium, Nagoya, Japan.

2012

Journal - Research Article

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

Conference Contribution - Published proceedings: Abstract

Seppälä, A. (2012). EPP contribution to tropospheric variations. Proceedings of the 4th International High-Energy Particle Precipitation in the Atmosphere (HEPPA) Workshop in conjunction with Solar Influences for Stratospheric Processes and their Role in Climate (SPARC/SOLARIS) Conference. (pp. 59). Retrieved from https://www2.acom.ucar.edu/heppasolaris

Seppälä, A. (2012). Particle precipitation impacts on the atmosphere. Geophysical Research Abstracts, 14, EGU2012-8267. Retrieved from https://www.geophysical-research-abstracts.net/

Newnham, D. A., Espy, P. J., Clilverd, M. A., Rodger, C. J., Seppälä, A., Maxfield, D. J., … Horne, R. B. (2012). Observations of nitric oxide in the Antarctic middle atmosphere during recurrent geomagnetic storms. Geophysical Research Abstracts, 14, 5445. [Abstract]

Conference Contribution - Verbal presentation and other Conference outputs

Seppälä, A. (2012, November). Solar influence on the atmosphere through Energetic Particle Precipitation. Invited presentation at the Workshop: From the Stratosphere to the Ionosphere, Paris, France.

2011

Journal - Research Article

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

Conference Contribution - Published proceedings: Abstract

Rodger, C. J., Clilverd, M. A., Seppälä, A., Thomson, N. R., Gamble, R. J., Parrot, M., … Berthelier, J.-J. (2011). Radiation belt electron precipitation due to geomagnetic storms: Significance to middle atmosphere ozone chemistry. Proceedings of the AGU Chapman Conference on Dynamics of the Earth's Radiation Belts and Inner Magnetosphere. (pp. 46). Retrieved from http://www.agu.org/meetings/chapman/2011/ecall/program/index.php

Rodger, C. J., Clilverd, M. A., Gamble, R. J., Ulich, T., Raita, T., Seppälä, A., … Thomson, N., … Parrot, M. (2011). Ground-based estimates of outer radiation belt energetic electron precipitation fluxes into the atmosphere. Proceedings of the AGU Chapman Conference on Dynamics of the Earth's Radiation Belts and Inner Magnetosphere. (pp. 45). Retrieved from http://www.agu.org/meetings/chapman/2011/ecall/program/index.php

Seppälä, A., Clilverd, M. A., Ulich, T., Enell, C.-F., Kero, A., Marsh, D., Rodger, C. J., … Turunen, E. (2011). ISSI project: Geospace coupling to polar atmosphere. Proceedings of the 3rd High Energy Particle Precipitation in the Atmosphere (HEPPA) Workshop. (pp. 60). Retrieved from http://heppa2011.iaa.es/php/9-scientific-program.htm

Clilverd, M. A., Rodger, C. J., Verronen, P. T., Seppälä, A., Turunen, E., Enell, C.-F., … Hibbins, R. (2011). Monitoring space weather impacts on D-region electron densities with EISCAT 3D. Proceedings of the 3rd EISCAT_3D User Meeting. Retrieved from http://www.eiscat3d.se/drupal/node

Rodger, C. J., Clilverd, M. A., Gamble, R. J., Seppälä, A., Thomson, N. R., Parrot, M., … Ulich, T. (2011). Combining satellite and ground-based data to characterise energetic electron precipitation from the radiation belts. Proceedings of the 2nd International Demeter Workshop. Retrieved from http://demeter.cnrs-orleans.fr/demeter/workshop2011.jsp

Clilverd, M. A., Rodger, C., Gamble, R., Ulich, T., Raita, T., Seppälä, A., … Thomson, N., … Parrot, M. (2011). Ground-based estimates of outer radiation belt energetic electron precipitation fluxes into the atmosphere. Proceedings of the International Union of Geodesy and Geophysics (IUGG) General Assembly: Earth on the Edge: Science for a Sustainable Planet. [Abstract]

Rodger, C. J., Clilverd, M. A., Seppälä, A., Thompson, N. R., Gamble, R. J., Parrot, M., … Ulich, T. (2011). Radiation belt electron precipitation due to geomagnetic storms: Significance to middle atmosphere ozone chemistry. Proceedings of the 3rd High Energy Particle Precipitation in the Atmosphere (HEPPA) Workshop. (pp. 25). Retrieved from http://heppa2011.iaa.es/php/9-scientific-program.htm

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 in the Antarctic middle atmosphere. Proceedings of the 3rd High Energy Particle Precipitation in the Atmosphere (HEPPA) Workshop. (pp. 31). Retrieved from http://heppa2011.iaa.es/php/9-scientific-program.htm

Clilverd, M. A., Rodger, C. J., Verronen, P. T., Seppälä, A., Turunen, E., Enell, C.-F., … Tamminen, J. (2011). Atmospheric signatures of REP. Proceedings of the 3rd High Energy Particle Precipitation in the Atmosphere (HEPPA) Workshop. (pp. 27). Retrieved from http://heppa2011.iaa.es/php/9-scientific-program.htm

2010

Journal - Research Article

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

Journal - Research Other

Rodger, C. J., Clilverd, M. A., Thomson, N. R., Gamble, R. J., Seppälä, A., Turunen, E., … Berthelier, J.-J. (2010). Correction to ″Radiation belt electron precipitation into the atmosphere: Recovery from a geomagnetic storm″. Journal of Geophysical Research, 115, A09324. doi: 10.1029/2010JA016038

Conference Contribution - Published proceedings: Abstract

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. Proceedings of the 4th VLF/ELF Remote Sensing of Ionospheres and Magnetospheres (VERSIM) Workshop. Retrieved from http://physics.mff.cuni.cz/kfpp/versim10/list-prg.php

Rodger, C. J., Clilverd, M. A., Seppälä, A., Thomson, N. R., Gamble, R. J., Parrot, M., … Ulich, T. (2010). Radiation belt electron precipitation from plasmaspheric hiss: Significance to atmospheric ozone chemistry. Proceedings of the 4th VLF/ELF Remote Sensing of Ionospheres and Magnetospheres (VERSIM) Workshop. Retrieved from http://physics.mff.cuni.cz/kfpp/versim10/list-prg.php

Rodger, C. J., Clilverd, M., Gamble, R. J., Ulich, T., Raita, T., Seppälä, A. M., … Thomson, N. R., … Parrot, M. (2010). Ground-based estimates of outer radiation belt energetic electron precipitation fluxes into the atmosphere. Proceedings of the American Geophysical Union (AGU) Fall Meeting. Retrieved from http://www.agu.org/meetings/fm10/program/index.php

Newnham, D., Espy, P., Clilverd, M., Rodger, C. J., Seppälä, A., Maxfield, D., & Hartogh, P. (2010). Mesopheric nitric oxide (NO) enhancements above Troll Station, Antarctica during March-May 2008. Proceedings of the 38th Committee on Space Research (COSPAR) Scientific Assembly. Retrieved from https://www.cospar-assembly.org/abstractcd/COSPAR-10/

Rodger, C., Clilverd, M., Gamble, R., Ulich, T., Raita, T., et al, & Seppälä, A. (2010). Ground-based estimates of outer radition belt energetic electron precipitation fluxes into the atmosphere. Proceedings of the Scientific Committee on Solar-Terrestrial Physics (SCOSTEP) Symposium. Retrieved from http://www.iap-kborn.de/SCOSTEP2010/detailed-program.php

Seppälä, A., Randall, C., Clilverd, M., Rozanov, E., & Rodger, C. (2010). Geomagnetic activity and polar surface air temperature variability. Proceedings of the Scientific Committee on Solar-Terrestrial Physics (SCOSTEP) Symposium. Retrieved from http://www.iap-kborn.de/SCOSTEP2010/detailed-program.php

Conference Contribution - Verbal presentation and other Conference outputs

Rodger, C., Clilverd, M., Gamble, R., Ulich, T., Raita, T., et al, & Seppälä, A. (2010, July). Ground-based estimates of outer radition belt energetic electron precipitation fluxes into the atmosphere. Invited presentation at the Scientific Committee on Solar-Terrestrial Physics (SCOSTEP) Symposium, Berlin, Germany.

2009

Journal - Research Article

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., … Seppälä, A., … 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

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

2008

Journal - Research Article

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

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

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

Conference Contribution - Published proceedings: Abstract

Rodger, C., Seppälä, A., & Clilverd, M. A. (2008). Significance of transient luminous events to neutral chemistry: Experimental measurements. Proceedings of the Japan Geoscience Union Meeting. Retrieved from http://www.jpgu.org/publication/cd-rom/2008cd-rom/index_e.htm

Seppälä, A., Verronen, P. T., Clilverd, M. A., Rodger, C. J., Turunen, E., Ulich, T., & Enell, C.-F. (2008). The effects of hard spectra solar proton events on the middle atmosphere. In P. T. Verronen (Ed.), Proceedings of the 1st International High Energy Particle Precipitation in the Atmosphere (HEPPA) Workshop. (pp. 56). Helsinki, Finland: Finnish Meteorological Institute. [Abstract]

Rodger, C. J., Verronen, P. T., Clilverd, M. A., Seppälä, A., & Turunen, E. (2008). Significance of the Carrington event solar proton event to the neutral atmosphere. In P. T. Verronen (Ed.), Proceedings of the 1st International High Energy Particle Precipitation in the Atmosphere (HEPPA) Workshop. (pp. 54). Helsinki, Finland: Finnish Meteorological Institute. [Abstract]

Turunen, E., Verronen, P. T., Seppälä, A., Rodger, C. J., Clilverd, M. A., Tamminen, J., … Ulich, T. (2008). Impact of different energies of precipitating particles on NO_x generation in the middle and upper atmosphere during geomagnetic storms. In P. T. Verronen (Ed.), Proceedings of the 1st International High Energy Particle Precipitation in the Atmosphere (HEPPA) Workshop. (pp. 44). Helsinki, Finland: Finnish Meteorological Institute. [Abstract]

Clilverd, M. A., Seppälä, A., Rodger, C. J., & Turunen, E. (2008). Modelling the impact of a relativistic electron precipitation event on the stratosphere. In P. T. Verronen (Ed.), Proceedings of the 1st International High Energy Particle Precipitation in the Atmosphere (HEPPA) Workshop. (pp. 24). Helsinki, Finland: Finnish Meteorological Institute. [Abstract]

Rodger, C. J., Clilverd, M. A., Thomson, N. R., Gamble, R. J., Seppälä, A., Turunen, E., & et al (2008). Radiation belt electron precipitation into the atmosphere: Recovery from a geomagnetic storm. Geophysical Research Abstracts, 10, A-06077. Retrieved from http://www.cosis.net/abstracts/EGU2008/06077/EGU2008-A-06077.pdf

Rodger, C. J., Seppälä, A., & Clilverd, M. A. (2008). Significance of transient luminous events to neutral chemistry: Experimental measurements. Proceedings of the Workshop on Coupling of Thunderstorms and Lightning Discharges to Near-Earth Space. Retrieved from http://www.oma.be/TLE2008Workshop/SubmittedAbstracts.html

Clilverd, M. A., Seppälä, A., & Rodger, C. J. (2008). Modelling the impact of a relativistic electron precipitation event on the stratosphere. Proceedings of the 3rd VLF/ELF Remote Sensing of Ionospheres and Magnetospheres (VERSIM) Workshop. Retrieved from http://sas2.elte.hu/versim/versim1.htm

Raita, T., Rodger, C. J., 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. Proceedings of the 3rd VLF/ELF Remote Sensing of Ionospheres and Magnetospheres (VERSIM) Workshop. Retrieved from http://sas2.elte.hu/versim/versim1.htm

2007

Journal - Research Article

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., 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

Conference Contribution - Published proceedings: Abstract

Seppälä, A., Clilverd, M. A., & Rodger, C. J. (2007). NO_x enhancements in the middle atmosphere: The relative significance of solar proton events and the aurora as a source. Eos, 88 (52, Fall Meeting Suppl.). SA23A-1133. [Abstract]

Rodger, C. J., Clilverd, M. A., Thomson, N. R., Gamble, R. J., Seppälä, A., Turunen, E., & et al (2007). Radiation belt electron precipitation into the atmosphere: Recovery from a geomagnetic storm. Eos, 88 (52, Fall Meeting Suppl.). SM21A-0322. [Abstract]

Rodger, C., Seppälä, A., & Clilverd, M. A. (2007). TLE influence upon the neutral chemistry of the upper atmosphere. In L. Ubertini, P. Manciola, S. Casadei & S. Grimaldi (Eds.), Proceedings of International Union of Geodesy and Geophysics XXIV General Assembly. Perugia, Italy: USMA. Retrieved from http://www.iugg2007perugia.it/webbook/download.htm

Seppälä, A., Clilverd, M. A., & Rodger, C. J. (2007). Nox enhancements in the middle atmosphere: The relative significance of solar proton events and the aurora as a source. In L. Ubertini, P. Manciola, S. Casadei & S. Grimaldi (Eds.), Proceedings of International Union of Geodesy and Geophysics XXIV General Assembly. Perugia, Italy: USMA. Retrieved from http://www.iugg2007perugia.it/webbook/download.htm

Clilverd, M., Seppälä, A., Rodger, C. J., Thomson, N. R., Lichtenberger, J., & Steinbach, P. (2007). Temporal variability of the descent of high-altitude nox inferred from ionospheric data. In L. Ubertini, P. Manciola, S. Casadei & S. Grimaldi (Eds.), Proceedings of International Union of Geodesy and Geophysics XXIV General Assembly. Perugia, Italy: USMA. Retrieved from http://www.iugg2007perugia.it/webbook/download.htm

Conference Contribution - Verbal presentation and other Conference outputs

Rodger, C., Clilverd, M. A., Thomson, N. R., Gamble, R. J., Seppälä, A., Turunen, E., & et al (2007, July). Radiation belt electron precipitation into the atmosphere: Recovery from a geomagnetic storm. Verbal presentation at the International Union of Geodesy and Geophysics XXIV General Assembly, Perugia, Italy.

2006

Journal - Research Article

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.

Conference Contribution - Published proceedings: Abstract

Seppälä, A., Verronen, P. T., Sofieva, V. F., Tamminen, J., Kryölä, E., Rodger, C. J., & Clilverd, M. A. (2006). Destruction of the tertiary ozone maximum during a solar proton event. Geophysical Research Abstracts, 8, A-006370. Retrieved from http://www.cosis.net/abstracts/EGU06/06370/EGU06-J-06370.pdf

Clilverd, M. A., Seppälä, A., Rodger, C. J., Thomson, N. R., Verronen, P. T., Turunen, E., … Steinbach, P. (2006). Modelling the ionospheric effects of solar proton events using the Sodankylä Ion Chemistry model. In J. Manninen, T. Ulich & A.-L. Piippo (Eds.), Proceedings of the 2nd VLF/ELF Remote Sensing of Ionospheres and Magnetospheres (VERSIM) Workshop [Report No. 56]. (pp. 25). Sodankylä, Finland: Sodankylä Geophysical Observatory. [Abstract]

Clilverd, M. A., Seppälä, A., Rodger, C. J., Verronen, P. T., Thomson, N. R., Lichtenberger, J., & Steinbach, P. (2006). VLF evidence of thermosphere-to-stratosphere descent of polar NOX. In J. Manninen, T. Ulich & A.-L. Piippo (Eds.), Proceedings of the 2nd VLF/ELF Remote Sensing of Ionospheres and Magnetospheres (VERSIM) Workshop [Report No. 56]. (pp. 63). Sodankylä, Finland: Sodankylä Geophysical Observatory. [Abstract]

Seppälä, A., Verronen, P. T., Clilverd, M. A., Rodger, C. J., Turunen, E., Ulich, T., & et al (2006). Importance of proton spectral hardness in the atmospheric effects of solar proton events: The Jan 2005 events. In J. Manninen, T. Ulich & A.-L. Piippo (Eds.), Proceedings of the 2nd VLF/ELF Remote Sensing of Ionospheres and Magnetospheres (VERSIM) Workshop [Report No. 56]. (pp. 64). Sodankylä, Finland: Sodankylä Geophysical Observatory. [Abstract]

Turunen, E., Rodger, C. J., Verronen, P. T., Seppälä, A., Ulich, T., Clilverd, M. A., & et al (2006). What if we knew the energy characteristics of precipitating relativistic electrons using VLF recordings and D-region ion chemistry modelling? In J. Manninen, T. Ulich & A.-L. Piippo (Eds.), Proceedings of the 2nd VLF/ELF Remote Sensing of Ionospheres and Magnetospheres (VERSIM) Workshop [Report No. 56]. (pp. 49). Sodankylä, Finland: Sodankylä Geophysical Observatory. [Abstract]

Conference Contribution - Verbal presentation and other Conference outputs

Turunen, E., Enell, C., Ulich, T., Kero, A., Verronen, P., Seppälä, A., Rodger, C., & Clilverd, M. (2006, June). Chemical effect of excess ionisation events in the mesosphere. Verbal presentation at the Atmosphere-Space Interaction Monitor (ASIM) Science Workshop, Noordwijk, The Netherlands.

2005

Journal - Research Article

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.

Conference Contribution - Published proceedings: Abstract

Verronen, P. T., Seppälä, A., Kyrölä, E., Hassinen, S., Backman, L., Hauchecorne, A., … Rodger, C. J., … Ulich, T. (2005). NO₂ and ozone changes in the Northern Hemisphere middle atmosphere due to the October-November 2003 solar proton events. Proceedings of the International Association of Geomagnetism and Aeronomy Scientific Assembly. [Abstract]

Seppälä, A., Verronen, P. T., Clilverd, M. A., Rodger, C. J., Kyrölä, E., Turunen, E., & Ulich, T. (2005). The effects of the January 2005 solar events on the middle atmosphere. Eos Transactions AGU: Fall Meeting Supplement. 86(52). [Abstract]

Clilverd, M. A., Rodger, C. J., Seppälä, A., & Ulich, T. (2005). The importance of atmospheric precipitation in storm-time relativistic electron flux drop outs: Observations of the January 21, 2005 event. Eos Transactions AGU: Fall Meeting Supplement. 86(52). [Abstract]

Seppälä, A., Verronen, P. T., Clilverd, M. A., Rodger, C. J., Turunen, E., Ulich, T., & Enell, C.-F. (2005). The high energy proton fluxes of January 2005: Impact on middle atmosphere. Proceedings of the International Association of Geomagnetism and Aeronomy Scientific Assembly. [Abstract]

Clilverd, M. A., Seppälä, A., Rodger, C. J., Thomson, N. R., Verronen, P. T., Turunen, E., … Steinbach, P. (2005). Modelling the ionospheric effects of solar proton events in the polar atmosphere. Proceedings of the International Association of Geomagnetism and Aeronomy Scientific Assembly. [Abstract]

2004

Conference Contribution - Published proceedings: Abstract

Clilverd, M., Rodger, C., Thomson, N., Ulich, T., Turunen, E., Seppälä, A., & Botman, A. (2004). The impact of energetic precipitation in the southern Polar Cap during a solar proton event. In J. Kultima (Ed.), Proceedings of the Sodankylä Geophysical Observatory Publications VFL Workshop. 96, (pp. 21). Sodankylä, Finland: SGOP. [Abstract]