Articles | Volume 43, issue 1
https://doi.org/10.5194/angeo-43-331-2025
https://doi.org/10.5194/angeo-43-331-2025
Regular paper
 | 
27 Jun 2025
Regular paper |  | 27 Jun 2025

Indications for particle precipitation impact on the ion-neutral collision frequency analyzed with EISCAT measurements

Florian Günzkofer, Gunter Stober, Johan Kero, David R. Themens, Anders Tjulin, Njål Gulbrandsen, Masaki Tsutsumi, and Claudia Borries

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Latest update: 18 Jul 2025
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Short summary
The Earth’s magnetic field is not closed at high latitudes. Electrically charged particles can penetrate the Earth’s atmosphere, deposit their energy, and heat the local atmosphere–ionosphere. This presumably causes an upwelling of the neutral atmosphere, which affects the atmosphere–ionosphere coupling. We apply a new analysis technique to infer the atmospheric density from incoherent scatter radar measurements. We identify signs of particle precipitation impact on the neutral atmosphere.
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