04 Oct 2023
 | 04 Oct 2023
Status: this preprint is currently under review for the journal ANGEO.

Scale Size Estimation of Magnetosheath Jets

Adrian Pöppelwerth, Georg Glebe, Johannes Z. D. Mieth, Florian Koller, Tomas Karlsson, Zoltan Vörös, and Ferdinand Plaschke

Abstract. Transient enhancements in the dynamic pressure, so-called magnetosheath jets or simply jets, are abundantly found in the magnetosheath. After their formation at the bow shock, they travel through the magnetosheath towards the magnetopause. On their way through the magnetosheath, jets disturb the ambient plasma. In this paper, we use multi-point measurements from the Time History of Events and Macroscale Interactions during Substorms (THEMIS) mission of the motion of ambient magnetosheath plasma responding to the passage of a jet to reconstruct the location of the central axis of that jet, along its propagation direction. This method allows to estimate the spatial distribution of the dynamic pressure within the jet. In addition, the scale size perpendicular to the propagation direction could be estimated for different cross sections. Both dynamic pressure and scale size decrease from the center along the propagation axis towards the rear part.

Adrian Pöppelwerth et al.

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on angeo-2023-31', Anonymous Referee #1, 23 Oct 2023
  • RC2: 'Comment on angeo-2023-31', Anonymous Referee #2, 30 Oct 2023

Adrian Pöppelwerth et al.

Adrian Pöppelwerth et al.


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Short summary
In the magnetosheath, a near-Earth region of space, we observe increases in plasma velocity and density called jets. As they propagate, the jets disturb the ambient plasma. We study this interaction with three spacecraft simultaneously. Using the plasma motion, we reconstruct the propagation axis and calculate a simple model of the jet shape. We find that the cross section perpendicular to the propagation and the dynamic pressure decrease from the center of the jet to the rear.