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ANGEO | Articles | Volume 37, issue 6
Ann. Geophys., 37, 1063–1077, 2019
https://doi.org/10.5194/angeo-37-1063-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: Vertical coupling in the atmosphere–ionosphere system

Ann. Geophys., 37, 1063–1077, 2019
https://doi.org/10.5194/angeo-37-1063-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Regular paper 28 Nov 2019

Regular paper | 28 Nov 2019

Magnetic local time asymmetries in precipitating electron and proton populations with and without substorm activity

Olesya Yakovchuk and Jan Maik Wissing
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Cited articles  
Akasofu, S.-I.: The development of the auroral substorm, Planet. Space Sci., 12, 273–282, https://doi.org/10.1016/0032-0633(64)90151-5, 1964. a
Akasofu, S.-I.: Auroral substorms as an electrical discharge phenomenon, Progress in Earth and Planetary Science, 2, 20, https://doi.org/10.1186/s40645-015-0050-9, 2015. a
Akasofu, S. I., Chapman, S., and Meng, C. I.: The polar electrojet, J. Atmos. Terr. Phys., 27, 1275–1300, https://doi.org/10.1016/0021-9169(65)90087-5, 1965. a
Allison, H. J., Horne, R. B., Glauert, S. A., and Del Zanna, G.: The magnetic local time distribution of energetic electrons in the radiation belt region, J. Geophys. Res.-Space, 122, 8108–8123, https://doi.org/10.1002/2017JA024084, 2017. a, b
Asikainen, T., Mursula, K., and Maliniemi, V.: Correction of detector noise and recalibration of NOAA/MEPED energetic proton fluxes, J. Geophys. Res., 117, A09204, https://doi.org/10.1029/2012JA017593, 2012. a
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We present the magnetic local time (MLT) distribution of energetic particle precipitation into the ionosphere in combination with different substorm activities. In the long term average substorms may increase the night-sector flux by factor 2–4 and eventually reduce the day-time flux. The MLT flux differences themselves may even reach 2 orders of magnitude independently of substorm activity level. Since precipitating particles impact the ozone chemistry, this may have atmospheric implications.
We present the magnetic local time (MLT) distribution of energetic particle precipitation into...
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