EGU26-3992, updated on 13 Mar 2026
https://doi.org/10.5194/egusphere-egu26-3992
EGU General Assembly 2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Oral | Monday, 04 May, 14:25–14:35 (CEST)
 
Room -2.15
Solar wind turbulence from fluid to kinetic scales: observations at 0.053 and 1 au. 
Olga Alexandrova1, Amelie Fournier2, Petr Hellinger3, Milan Maksimovic1, Andre Mangeney1, and Stuart Bale4
Olga Alexandrova et al.
  • 1LIRA, Observatoire de Paris, Université PSL, Sorbonne Université, Université Paris Cité, CY Cergy Paris Université, CNRS, 92190 Meudon, France
  • 2ENS de Paris, France
  • 3Astronomical Institute, Boční II 1401, Prague CZ-141 00, Czech Republic
  • 4Space Sciences Laboratory, University of California, Berkeley, USA

We study Cluster Guest Investigator data when 2 satellites were at 7 km distance, that corresponds to few electron Larmor radius. We find a typical spectral shape within the kinetic range and signatures of intermittency up to electron scales. Local analysis of magnetic fluctuations at electron scales indicates presence of vortex-like coherent structures. We show that these electron scale events are embedded in coherent structures at ion and fluid scales. The results at 1 au are compared with spectral properties and coherent structures at kinetic scales observed by Parker Solar Probe at 11.4 solar radii distance from the Sun during Encounter 19.

How to cite: Alexandrova, O., Fournier, A., Hellinger, P., Maksimovic, M., Mangeney, A., and Bale, S.: Solar wind turbulence from fluid to kinetic scales: observations at 0.053 and 1 au. , EGU General Assembly 2026, Vienna, Austria, 3–8 May 2026, EGU26-3992, https://doi.org/10.5194/egusphere-egu26-3992, 2026.