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
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Noora Partamies, Fasil Tesema, Emma Bland, Erkka Heino, Hilde Nesse Tyssøy, and Erlend Kallelid
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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.
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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...
