Articles | Volume 39, issue 1
https://doi.org/10.5194/angeo-39-135-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-39-135-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Regular paper
| 
10 Feb 2021
Regular paper |
| 10 Feb 2021
| 10 Feb 2021
D-region impact area of energetic electron precipitation during pulsating aurora
Emma Bland
CORRESPONDING AUTHOR
Department of Arctic Geophysics, University Centre in Svalbard, Longyearbyen, Norway
Fasil Tesema
Department of Arctic Geophysics, University Centre in Svalbard, Longyearbyen, Norway
Birkeland Centre for Space Science, University of Bergen, Bergen, Norway
Noora Partamies
Department of Arctic Geophysics, University Centre in Svalbard, Longyearbyen, Norway
Birkeland Centre for Space Science, University of Bergen, Bergen, Norway
Related authors
Noora Partamies, Fasil Tesema, Emma Bland, Erkka Heino, Hilde Nesse Tyssøy, and Erlend Kallelid
Ann. Geophys., 39, 69–83, https://doi.org/10.5194/angeo-39-69-2021, https://doi.org/10.5194/angeo-39-69-2021, 2021
Short summary
Short summary
About 200 nights of substorm activity have been analysed for their magnetic disturbance magnitude and the level of cosmic radio noise absorption. We show that substorms with a single expansion phase have limited lifetimes and spatial extents. Starting from magnetically quiet conditions, the strongest absorption occurs after 1 to 2 nights of substorm activity. This prolonged activity is thus required to accelerate particles to energies, which may affect the atmospheric chemistry.
Maxime Grandin, Noora Partamies, and Ilkka I. Virtanen
Ann. Geophys., 42, 355–369, https://doi.org/10.5194/angeo-42-355-2024, https://doi.org/10.5194/angeo-42-355-2024, 2024
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Auroral displays typically take place at high latitudes, but the exact latitude where the auroral breakup occurs can vary. In this study, we compare the characteristics of the fluxes of precipitating electrons from space during auroral breakups occurring above Tromsø (central part of the auroral zone) and above Svalbard (poleward boundary of the auroral zone). We find that electrons responsible for the aurora above Tromsø carry more energy than those precipitating above Svalbard.
Maxime Grandin, Emma Bruus, Vincent E. Ledvina, Noora Partamies, Mathieu Barthelemy, Carlos Martinis, Rowan Dayton-Oxland, Bea Gallardo-Lacourt, Yukitoshi Nishimura, Katie Herlingshaw, Neethal Thomas, Eero Karvinen, Donna Lach, Marjan Spijkers, and Calle Bergstrand
EGUsphere, https://doi.org/10.5194/egusphere-2024-2174, https://doi.org/10.5194/egusphere-2024-2174, 2024
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We carried out a citizen science study of aurora sightings and experienced technological disruptions during the extreme geomagnetic storm of 10 May 2024. We collected reports from 696 observers from over 30 countries via an online survey, supplemented with observations logged in the Skywarden database. We found that the aurora was seen from exceptionally low latitudes and had very bright red and pink hues, suggesting that high fluxes of low-energy electrons from space entered the atmosphere.
Noora Partamies, Bas Dol, Vincent Teissier, Liisa Juusola, Mikko Syrjäsuo, and Hjalmar Mulders
Ann. Geophys., 42, 103–115, https://doi.org/10.5194/angeo-42-103-2024, https://doi.org/10.5194/angeo-42-103-2024, 2024
Short summary
Short summary
Auroral imaging produces large amounts of image data that can no longer be analyzed by visual inspection. Thus, every step towards automatic analysis tools is crucial. Previously supervised learning methods have been used in auroral physics, with a human expert providing ground truth. However, this ground truth is debatable. We present an unsupervised learning method, which shows promising results in detecting auroral breakups in the all-sky image data.
Noora Partamies, Daniel Whiter, Kirsti Kauristie, and Stefano Massetti
Ann. Geophys., 40, 605–618, https://doi.org/10.5194/angeo-40-605-2022, https://doi.org/10.5194/angeo-40-605-2022, 2022
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We investigate the local time behaviour of auroral structures and emission height. Data are collected from the Fennoscandian Lapland and Svalbard latitutes from 7 identical auroral all-sky cameras over about 1 solar cycle. The typical peak emission height of the green aurora varies from 110 km on the nightside to about 118 km in the morning over Lapland but stays systematically higher over Svalbard. During fast solar wind, nightside emission heights are 5 km lower than during slow solar wind.
Pekka T. Verronen, Antti Kero, Noora Partamies, Monika E. Szeląg, Shin-Ichiro Oyama, Yoshizumi Miyoshi, and Esa Turunen
Ann. Geophys., 39, 883–897, https://doi.org/10.5194/angeo-39-883-2021, https://doi.org/10.5194/angeo-39-883-2021, 2021
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This paper is the first to simulate and analyse the pulsating aurorae impact on middle atmosphere on monthly/seasonal timescales. We find that pulsating aurorae have the potential to make a considerable contribution to the total energetic particle forcing and increase the impact on upper stratospheric odd nitrogen and ozone in the polar regions. Thus, it should be considered in atmospheric and climate simulations.
Joshua Dreyer, Noora Partamies, Daniel Whiter, Pål G. Ellingsen, Lisa Baddeley, and Stephan C. Buchert
Ann. Geophys., 39, 277–288, https://doi.org/10.5194/angeo-39-277-2021, https://doi.org/10.5194/angeo-39-277-2021, 2021
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Small-scale auroral features are still being discovered and are not well understood. Where aurorae are caused by particle precipitation, the newly reported fragmented aurora-like emissions (FAEs) seem to be locally generated in the ionosphere (hence,
aurora-like). We analyse data from multiple instruments located near Longyearbyen to derive their main characteristics. They seem to occur as two types in a narrow altitude region (individually or in regularly spaced groups).
Noora Partamies, Fasil Tesema, Emma Bland, Erkka Heino, Hilde Nesse Tyssøy, and Erlend Kallelid
Ann. Geophys., 39, 69–83, https://doi.org/10.5194/angeo-39-69-2021, https://doi.org/10.5194/angeo-39-69-2021, 2021
Short summary
Short summary
About 200 nights of substorm activity have been analysed for their magnetic disturbance magnitude and the level of cosmic radio noise absorption. We show that substorms with a single expansion phase have limited lifetimes and spatial extents. Starting from magnetically quiet conditions, the strongest absorption occurs after 1 to 2 nights of substorm activity. This prolonged activity is thus required to accelerate particles to energies, which may affect the atmospheric chemistry.
Fasil Tesema, Noora Partamies, Hilde Nesse Tyssøy, and Derek McKay
Ann. Geophys., 38, 1191–1202, https://doi.org/10.5194/angeo-38-1191-2020, https://doi.org/10.5194/angeo-38-1191-2020, 2020
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In this study, we present the ionization level from EISCAT radar experiments and cosmic noise absorption level
from KAIRA riometer observations during pulsating auroras. We found thick layers of ionization that reach down
to 70 km (harder precipitation) and higher cosmic noise absorption during patchy pulsating aurora than
during amorphous pulsating and patchy auroras.
Noora Partamies, James M. Weygand, and Liisa Juusola
Ann. Geophys., 35, 1069–1083, https://doi.org/10.5194/angeo-35-1069-2017, https://doi.org/10.5194/angeo-35-1069-2017, 2017
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Large-scale undulations of the diffuse aurora boundary, auroral omega bands, have been studied based on 438 omega-like structures identified over Fennoscandian Lapland from 1996 to 2007. The omegas mainly occurred in the post-magnetic midnight sector, in the region between oppositely directed ionospheric field-aligned currents, and during substorm recovery phases. The omega bands were observed during substorms, which were more intense than the average substorm in the same region.
Fred Sigernes, Pål Gunnar Ellingsen, Noora Partamies, Mikko Syrjäsuo, Pål Brekke, Silje Eriksen Holmen, Arne Danielsen, Bernt Olsen, Xiangcai Chen, Margit Dyrland, Lisa Baddeley, Dag Arne Lorentzen, Marcus Aleksander Krogtoft, Torstein Dragland, Hans Mortensson, Lisbeth Smistad, Craig J. Heinselman, and Shadia Habbal
Geosci. Instrum. Method. Data Syst., 6, 9–14, https://doi.org/10.5194/gi-6-9-2017, https://doi.org/10.5194/gi-6-9-2017, 2017
Short summary
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The total solar eclipse event on Svalbard on 20 March 2015 gave us a unique opportunity to image the upper parts of the Sun's atmosphere. A novel image accumulation filter technique is presented that is capable of distinguishing features such as loops, spicules, plumes, and prominences from intense and blurry video recordings of the chromosphere.
Tuomas Savolainen, Daniel Keith Whiter, and Noora Partamies
Geosci. Instrum. Method. Data Syst., 5, 305–314, https://doi.org/10.5194/gi-5-305-2016, https://doi.org/10.5194/gi-5-305-2016, 2016
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In this paper we describe a new method for recognition of digits in seven-segment displays. The method is used for adding date and time information to a dataset consisting of about 7 million auroral all-sky images taken during the time period of 1973–1997 at camera stations centred around Sodankylä observatory in Northern Finland. In each image there is a clock display for the date and time together with the reflection of the whole night sky through a spherical mirror.
Kirsti Kauristie, Minna Myllys, Noora Partamies, Ari Viljanen, Pyry Peitso, Liisa Juusola, Shabana Ahmadzai, Vikramjit Singh, Ralf Keil, Unai Martinez, Alexej Luginin, Alexi Glover, Vicente Navarro, and Tero Raita
Geosci. Instrum. Method. Data Syst., 5, 253–262, https://doi.org/10.5194/gi-5-253-2016, https://doi.org/10.5194/gi-5-253-2016, 2016
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We use the connection between auroras and geomagnetic field variations in a concept for a Regional Auroral Forecast (RAF) service. RAF is based on statistical relationships between alerts by the NOAA Space Weather Prediction Center and magnetic time derivatives measured by five MIRACLE magnetometer stations located in the surroundings of the Sodankylä research station. As an improvement to previous similar services RAF yields knowledge on typical auroral storm durations at different latitudes.
M. Myllys, N. Partamies, and L. Juusola
Ann. Geophys., 33, 573–581, https://doi.org/10.5194/angeo-33-573-2015, https://doi.org/10.5194/angeo-33-573-2015, 2015
B. J. Jackel, C. Unick, M. T. Syrjäsuo, N. Partamies, J. A. Wild, E. E. Woodfield, I. McWhirter, E. Kendall, and E. Spanswick
Geosci. Instrum. Method. Data Syst., 3, 71–94, https://doi.org/10.5194/gi-3-71-2014, https://doi.org/10.5194/gi-3-71-2014, 2014
D. K. Whiter, B. Gustavsson, N. Partamies, and L. Sangalli
Geosci. Instrum. Method. Data Syst., 2, 131–144, https://doi.org/10.5194/gi-2-131-2013, https://doi.org/10.5194/gi-2-131-2013, 2013
N. Partamies, L. Juusola, E. Tanskanen, and K. Kauristie
Ann. Geophys., 31, 349–358, https://doi.org/10.5194/angeo-31-349-2013, https://doi.org/10.5194/angeo-31-349-2013, 2013
Related subject area
Subject: Earth's ionosphere & aeronomy | Keywords: Particle precipitation
Statistical comparison of electron precipitation during auroral breakups occurring either near the open–closed field line boundary or in the central part of the auroral oval
Types of pulsating aurora: comparison of model and EISCAT electron density observations
On the relationship of energetic particle precipitation and mesopause temperature
Electron precipitation characteristics during isolated, compound, and multi-night substorm events
Maxime Grandin, Noora Partamies, and Ilkka I. Virtanen
Ann. Geophys., 42, 355–369, https://doi.org/10.5194/angeo-42-355-2024, https://doi.org/10.5194/angeo-42-355-2024, 2024
Short summary
Short summary
Auroral displays typically take place at high latitudes, but the exact latitude where the auroral breakup occurs can vary. In this study, we compare the characteristics of the fluxes of precipitating electrons from space during auroral breakups occurring above Tromsø (central part of the auroral zone) and above Svalbard (poleward boundary of the auroral zone). We find that electrons responsible for the aurora above Tromsø carry more energy than those precipitating above Svalbard.
Fasil Tesema, Noora Partamies, Daniel K. Whiter, and Yasunobu Ogawa
Ann. Geophys., 40, 1–10, https://doi.org/10.5194/angeo-40-1-2022, https://doi.org/10.5194/angeo-40-1-2022, 2022
Short summary
Short summary
In this study, we present the comparison between an auroral model and EISCAT radar electron densities during pulsating aurorae. We test whether an overpassing satellite measurement of the average energy spectrum is a reasonable estimate for pulsating aurora electron precipitation. When patchy pulsating aurora is dominant in the morning sector, the overpass-averaged spectrum is found to be a reasonable estimate – but not when there is a mix of pulsating aurora types in the post-midnight sector.
Florine Enengl, Noora Partamies, Nickolay Ivchenko, and Lisa Baddeley
Ann. Geophys., 39, 795–809, https://doi.org/10.5194/angeo-39-795-2021, https://doi.org/10.5194/angeo-39-795-2021, 2021
Short summary
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Energetic particle precipitation has the potential to change the neutral atmospheric temperature at the bottom of the ionosphere. We have searched for events and investigated a possible correlation between lower-ionosphere electron density enhancements and simultaneous neutral temperature changes. Six of the 10 analysed events are associated with a temperature decrease of 10–20K. The events change the chemical composition in the mesosphere, and the temperatures are probed at lower altitudes.
Noora Partamies, Fasil Tesema, Emma Bland, Erkka Heino, Hilde Nesse Tyssøy, and Erlend Kallelid
Ann. Geophys., 39, 69–83, https://doi.org/10.5194/angeo-39-69-2021, https://doi.org/10.5194/angeo-39-69-2021, 2021
Short summary
Short summary
About 200 nights of substorm activity have been analysed for their magnetic disturbance magnitude and the level of cosmic radio noise absorption. We show that substorms with a single expansion phase have limited lifetimes and spatial extents. Starting from magnetically quiet conditions, the strongest absorption occurs after 1 to 2 nights of substorm activity. This prolonged activity is thus required to accelerate particles to energies, which may affect the atmospheric chemistry.
Cited articles
Berkey, F. T., Driatskiy, V. M., Henriksen, K., Hultqvist, B., Jelly, D. H.,
Shchuka, T. I., Theander, A., and Ylindemi, J.: A synoptic investigation of
particle precipitation dynamics for 60 substorms in IQSY (1964–1965) and
IASY (1969), Planet. Space Sci., 22, 255–307,
https://doi.org/10.1016/0032-0633(74)90028-2, 1974. a
Berngardt, O. I.: Noise level forecasts at 8–20 MHz and their use for
morphological studies of ionospheric absorption variations at EKB ISTP SB
RAS radar, Adv. Space Res., 66, 278–291, https://doi.org/10.1016/j.asr.2020.04.005, 2020. a, b, c
Berngardt, O. I., Ruohoniemi, J. M., Nishitani, N., Shepherd, S. G., Bristow,
W. A., and Miller, E. S.: Attenuation of decameter wavelength sky noise
during x-ray solar flares in 2013–2017 based on the observations of
midlatitude HF radars, J. Atmos. Sol.-Terr.
Phy., 173, 1–13, https://doi.org/10.1016/j.jastp.2018.03.022, 2018. a
Bland, E. C., Heino, E., Kosch, M. J., and Partamies, N.: SuperDARN
Radar-Derived HF Radio Attenuation During the September 2017 Solar Proton
Events, Space Weather, 16, 1455–1469, https://doi.org/10.1029/2018SW001916, 2018. a, b, c, d
British Antarctic Survey: Super Dual Auroral Radar Network, available at: https://www.bas.ac.uk/project/superdarn, last access: 1 June 2020. a
Chakraborty, S., Ruohoniemi, J. M., Baker, J. B. H., and Nishitani, N.:
Characterization of Short-Wave Fadeout seen in Daytime SuperDARN Ground
Scatter Observations, Radio Sci., 53, 472–484, https://doi.org/10.1002/2017RS006488, 2018. a
Chakraborty, S., Baker, J. B. H., Ruohoniemi, J. M., Kunduri, B., Nishitani,
N., and Shepherd, S. G.: A Study of SuperDARN Response to Co-occurring
Space Weather Phenomena, Space Weather, 17, 1351–1363,
https://doi.org/10.1029/2019SW002179, 2019. a
Chisham, G., Lester, M., Milan, S. E., Freeman, M. P., Bristow, W. A., Grocott,
A., McWilliams, K. A., Ruohoniemi, J. M., Yeoman, T. K., Dyson, P. L.,
Greenwald, R. A., Kikuchi, T., Pinnock, M., Rash, J. P. S., Sato, N., Sofko,
G. J., Villain, J. P., and Walker, A. D. M.: A decade of the Super Dual
Auroral Radar Network (SuperDARN): Scientific achievements, new
techniques and future directions, Surv. Geophys., 28, 33–109,
https://doi.org/10.1007/s10712-007-9017-8, 2007. a
Cresswell-Moorcock, K., Rodger, C. J., Kero, A., Collier, A. B., Clilverd,
M. A., Häggström, I., and Pitkänen, T.: A reexamination of
latitudinal limits of substorm-produced energetic electron precipitation,
J. Geophys. Res.-Space, 118, 6694–6705,
https://doi.org/10.1002/jgra.50598, 2013. a, b
Donovan, E., Mende, S., Jackel, B., Frey, H., Syrjäsuo, M., Voronkov, I. Trondsen, T., Peticolas, L., Angelopoulos, V., Harris, S., Greffen, M., and Connors, M.: The
THEMIS all-sky imaging array – System design and initial results from the
prototype imager, J. Atmos. Sol.-Terr. Phy., 68,
1472–1487, 2006. a
Fang, X., Randall, C. E., Lummerzheim, D., Solomon, S. C., Mills, M. J., Marsh,
D. R., Jackman, C. H., Wang, W., and Lu, G.: Electron impact ionization: A
new parameterization for 100 eV to 1 MeV electrons, J.
Geophys. Res.-Space, 113, A09311, https://doi.org/10.1029/2008JA013384, 2008. a
Fiori, R. A. D., Koustov, A. V., Chakraborty, S., Ruohoniemi, J. M., Danskin,
D. W., Boteler, D. H., and Shepherd, S. G.: Examining the potential of the
Super Dual Auroral Radar Network for monitoring the space weather
impact of solar X-ray flares, Space Weather, 16, 1348–1362, https://doi.org/10.1029/2018SW001905, 2018. a
Greenwald, R. A., Baker, K. B., Dudeney, J. R., Pinnock, M., Jones, T. B.,
Thomas, E. C., Villain, J. P., Cerisier, J. C., Senior, C., Hanuise, C.,
Hunsucker, R. D., Sofko, G. J., Koehler, J., Nielsen, E., Pellinen, R.,
Walker, A. D. M., Sato, N., and Yamagishi, H.: DARN/SuperDARN: A Global
View of the Dynamics of High-Latitude Convection, Space Sci. Rev., 71,
761–796, https://doi.org/10.1007/BF00751350, 1995. a
Grono, E. and Donovan, E.: Differentiating diffuse auroras based on phenomenology, Ann. Geophys., 36, 891–898, https://doi.org/10.5194/angeo-36-891-2018, 2018. a, b
Grono, E. and Donovan, E.: Constraining the Source Regions of Pulsating
Auroras, Geophys. Res. Lett., 46, 10267–10273, https://doi.org/10.1029/2019GL084611, 2019. a, b
Jones, S. L., Lessard, M. R., Rychert, K., Spanswick, E., and Donovan, E.:
Large-scale aspects and temporal evolution of pulsating aurora, J.
Geophys. Res.-Space, 116, A03214, https://doi.org/10.1029/2010JA015840, 2011. a, b, c, d
Jones, S. L., Lessard, M. R., Rychert, K., Spanswick, E., Donovan, E., and
Jaynes, A. N.: Persistent, widespread pulsating aurora: A case study, J. Geophys. Res.-Space, 118, 2998–3006,
https://doi.org/10.1002/jgra.50301, 2013. a, b, c, d
Juusola, L., Østgaard, N., Tanskanen, E., Partamies, N., and Snekvik, K.:
Earthward plasma sheet flows during substorm phases, J. Geophys.
Res.-Space, 116, A10228, https://doi.org/10.1029/2011JA016852, 2011. a
Kasahara, S., Miyoshi, Y., Yokota, S., Mitani, T., Kasahara, Y., Matsuda, S., Kumamoto, A., Matsuoka, A., Kazama, Y., Frey, H. U., Angelopoulos, V., Kurita, S., Keika, K., Seki, K., and Shinohara, I.: Pulsating aurora
from electron scattering by chorus waves, Nature, 554, 337–340, https://doi.org/10.1038/nature25505, 2018. a
Kvifte, G. J. and Pettersen, H.: Morphology of the pulsating aurora, Planet. Space Sci., 17, 1599–1607, https://doi.org/10.1016/0032-0633(69)90148-2, 1969. a
Lessard, M. R.: A review of pulsating aurora, Auroral phenomenology and
magnetospheric processes: Earth and Other Planets, 197, 55–68, https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2011GM001187 (last access: 8 February 2021), 2012. a
Marsh, D., Garcia, R., Kinnison, D., Boville, B., Sassi, F., Solomon, S., and
Matthes, K.: Modeling the whole atmosphere response to solar cycle changes in
radiative and geomagnetic forcing, J. Geophys. Res.-Atmos., 112, D23306, https://doi.org/10.1029/2006JD008306, 2007. a, b
Milan, S. E., Jones, T. B., Robinson, T. R., Thomas, E. C., and Yeoman, T. K.: Interferometric evidence for the observation of ground backscatter originating behind the CUTLASS coherent HF radars, Ann. Geophys., 15, 29–39, https://doi.org/10.1007/s00585-997-0029-y, 1997. a
Miyoshi, Y., Katoh, Y., Nishiyama, T., Sakanoi, T., Asamura, K., and Hirahara,
M.: Time of flight analysis of pulsating aurora electrons, considering
wave-particle interactions with propagating whistler mode waves, J.
Geophys. Res.-Space, 115, A10312, https://doi.org/10.1029/2009JA015127, 2010. a
Miyoshi, Y., Oyama, S., Saito, S., Kurita, S., Fujiwara, H., Kataoka, R., Ebihara, Y., Kletzing, C., Reeves, G., Santolik, O., Clilverd, M., Rodger, C. J., Turunen, E., and Tsuchiya, F.: Energetic
electron precipitation associated with pulsating aurora: EISCAT and Van
Allen Probe observations, J. Geophys. Res.-Space,
120, 2754–2766, https://doi.org/10.1002/2014JA020690, 2015. a
NASA: GSFC/SPDF OMNIWeb interface, available at: https://omniweb.gsfc.nasa.gov, last access: 1 June 2020. a
National Institute of Polar Research, Japan: Syowa Color Digital Camera (CDC), available at: http://polaris.nipr.ac.jp/~acaurora/syowa_CDC_QL/, last access: 1 June 2020. a
Nishimura, Y., Lessard, M. R., Katoh, Y., Miyoshi, Y., Grono, E., Partamies, N., Sivadas, N., Hosokawa, K., Fukizawa, M., Samara, M., Michell, R. G., Kataoka, R., Sakanoi, T., Whiter, D. K., Oyama, S., Ogawa, Y., and Kurita, S.: Diffuse and
pulsating aurora, Space Sci. Rev., 216, 1–38, https://doi.org/10.1007/s11214-019-0629-3, 2020. a
Nishitani, N., Ruohoniemi, J. M., Lester, M., Baker, J. B. H., Koustov, A. V., Shepherd, S. G., Chisham, G., Hori, T., Thomas, E. G., Makarevich, R. A., Marchaudon, A., Ponomarenko, P., Wild, J. A., Milan, S. E., Bristow, W. A., Devlin, J., Miller, E., Greenwald, R. A., Ogawa, T., and Kikuchi, T.: Review of the accomplishments of mid-latitude Super Dual
Auroral Radar Network (SuperDARN) HF radars, Prog. Earth Planet. Sc., 6, 1–57, https://doi.org/10.1186/s40645-019-0270-5, 2019. a, b
Oguti, T., Kokubun, S., Hayashi, K., Tsuruda, K., Machida, S., Kitamura, T.,
Saka, O., and Watanabe, T.: Statistics of pulsating auroras on the basis of
all-sky TV data from five stations. I. Occurrence frequency, Can.
J. Phys., 59, 1150–1157, https://doi.org/10.1139/p81-152, 1981. a
Partamies, N., Juusola, L., Tanskanen, E., and Kauristie, K.: Statistical properties of substorms during different storm and solar cycle phases, Ann. Geophys., 31, 349–358, https://doi.org/10.5194/angeo-31-349-2013, 2013. a
Partamies, N., Whiter, D., Kadokura, A., Kauristie, K., Nesse Tyssøy, H.,
Massetti, S., Stauning, P., and Raita, T.: Occurrence and average behavior of
pulsating aurora, J. Geophys. Res.-Space, 122,
5606–5618, https://doi.org/10.1002/2017JA024039, 2017. a, b, c, d
SuperDARN Data Analysis Working Group, Thomas, E. G., Schmidt, M. T., Bland, E. C., Burrell, A. G., Ponomarenko, P. V., Reimer, A. S., Sterne, K. T., and Walach, M.-T.: SuperDARN Radar Software Toolkit (RST) 4.5, Zenodo, https://doi.org/10.5281/zenodo.801458, 2021. a
Tesema, F., Partamies, N., Nesse Tyssøy, H., Kero, A., and Smith-Johnsen,
C.: Observations of electron precipitation during pulsating aurora and its
chemical impact, J. Geophys. Res.-Space, 125,
e2019JA027713, https://doi.org/10.1029/2019JA027713, 2020a. a, b, c
Tesema, F., Partamies, N., Nesse Tyssøy, H., and McKay, D.: Observations of precipitation energies during different types of pulsating aurora, Ann. Geophys., 38, 1191–1202, https://doi.org/10.5194/angeo-38-1191-2020, 2020b. a, b, c
Thorne, R. M., Ni, B., Tao, X., Horne, R. B., and Meredith, N. P.: Scattering
by chorus waves as the dominant cause of diffuse auroral precipitation,
Nature, 467, 943–946, https://doi.org/10.1038/nature09467, 2010. a
Turunen, E., Verronen, P. T., Seppälä, A., Rodger, C. J., Clilverd,
M. A., Tamminen, J., Enell, C.-F., and Ulich, T.: Impact of different
energies of precipitating particles on NOx generation in the middle and
upper atmosphere during geomagnetic storms, J. Atmos.
Sol.-Terr. Phy., 71, 1176–1189, https://doi.org/10.1016/j.jastp.2008.07.005,
2009. a, b
Turunen, E., Kero, A., Verronen, P. T., Miyoshi, Y., Oyama, S.-I., and Saito,
S.: Mesospheric ozone destruction by high-energy electron precipitation
associated with pulsating aurora, J. Geophys. Res.-Atmos., 121, 11852–11861, https://doi.org/10.1002/2016JD025015, 2016. a
van de Kamp, M., Seppälä, A., Clilverd, M. A., Rodger, C. J., Verronen,
P. T., and Whittaker, I. C.: A model providing long-term data sets of
energetic electron precipitation during geomagnetic storms, J.
Geophys. Res.-Atmos., 121, 12520–12540, https://doi.org/10.1002/2015JD024212, 2016.
a
Verronen, P. T., Seppälä, A., Clilverd, M. A., Rodger, C. J., Kyrölä,
E., Enell, C.-F., Ulich, T., and Turunen, E.: Diurnal variation of ozone
depletion during the October–November 2003 solar proton events, J. Geophys. Res.-Space, 110, A09S32, https://doi.org/10.1029/2004JA010932,
2005. a
Verronen, P. T., Andersson, M. E., Marsh, D. R., Kovács, T., and Plane, J.
M. C.: WACCM-D – Whole Atmosphere Community Climate Model with
D-region ion chemistry, J. Adv. Model. Earth Sy., 8,
954–975, https://doi.org/10.1002/2015MS000592, 2016. a
Watanabe, D. and Nishitani, N.: Study of ionospheric disturbances during solar
flare events using the SuperDARN Hokkaido radar, Advances in Polar
Science, 24, 12–18, https://doi.org/10.3724/SP.J.1085.2013.00012, 2013. a
Yang, B., Donovan, E., Liang, J., and Spanswick, E.: A statistical study of the motion of pulsating aurora patches: using the THEMIS All-Sky Imager, Ann. Geophys., 35, 217–225, https://doi.org/10.5194/angeo-35-217-2017, 2017. a
Yang, B., Spanswick, E., Liang, J., Grono, E., and Donovan, E.: Responses of
Different Types of Pulsating Aurora in Cosmic Noise Absorption, Geophys.
Res. Lett., 46, 5717–5724, https://doi.org/10.1029/2019GL083289, 2019. a, b
Short summary
A total of 10 Super Dual Auroral Radar Network radars were used to estimate the horizontal area over which energetic electrons impact the atmosphere at 70–100 km altitude during pulsating aurorae (PsAs). The impact area varies significantly from event to event. Approximately one-third extend over 12° of magnetic latitude, while others are highly localised. Our results could be used to improve the forcing used in atmospheric/climate models to properly capture the energy contribution from PsAs.
A total of 10 Super Dual Auroral Radar Network radars were used to estimate the horizontal area...
