Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 44, issue 1
Articles | Volume 44, issue 1
https://doi.org/10.5194/angeo-44-1-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-44-1-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 44, issue 1
Regular paper
 | 
12 Jan 2026
Regular paper |  | 12 Jan 2026

Time-dependent modeling of Alfvénic precipitation observed in the ionosphere

Etienne Gavazzi, Andres Spicher, Björn Gustavsson, James Clemmons, Robert Pfaff, and Douglas Rowland

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Latest update: 23 Oct 2026
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Short summary
Auroral precipitation refers to energetic particles that come down into the upper part of our atmosphere, the ionosphere. There, they collide with atoms and molecules and transfer some of their energy, causing aurora. The most rapid time-variation of this energy deposition and its consequences on the ionosphere are not fully understood. We show here that one can use a new model to study auroral precipitation on sub-second timescales and advance our understanding about small-scale dynamic aurora.
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