- 1Institute for Plasma Science and Technology - CNR, Bari, Italy (lucasorriso@gmail.com)
- 2KTH, Stockholm, Sweden (lucasorriso@gmail.com)
- 3Queen Mary university, London, UK (shiladittya.02@gmail.com)
- 4Department of Physics, Indian Institute of Technology, Kanpur, India (sbanerjee@iitk.ac.in)
- 5School of Electronic Information, Wuhan University, Wuhan, People's Republic of China (honghongwu@whu.edu.cn)
- 6Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, CA, USA (nsioulas@g.ucla.edu)
- 7INAF-OATO, Pino Torinese, Italy (daniele.telloni@oato.inaf.it)
- 8INAF-IAPS, Roma, Italy (raffaella.damicis@iaps.inaf.it)
- 9IRF Uppsala, Sweden (eya@irfu.se)
The solar wind is highly turbulent, which results in power-law spectra and intermittency for magnetic and velocity fluctuations within the inertial range.
Using fast solar wind intervals measured during solar minima between 0.3 au and 3.16 au, a clear break emerges within the traditional inertial range, with signatures of two inertial sub-ranges with f-3/2 and f-5/3 power laws in the magnetic power spectra. The intermittency, measured through the scaling law of the kurtosis of magnetic field fluctuations, further confirms the existence of two different power laws separated by a clear break. A systematic study on the evolution of the said sub-ranges as a function of heliospheric distance shows correlation of the break scale with both the turbulence outer scale and the typical ion scales. Finally, using Parker Solar Probe data measured closer to the Sun, we highlight the role of switchbacks and switchback patches in generating such scale breaks.
How to cite: Sorriso-Valvo, L., Mondal, S., Banerjee, S., Larosa, A., Wu, H., Sioulas, N., Telloni, D., D'Amicis, R., and Yordanova, E.: Emergence of a characteristic scale in the Alfvénic solar wind turbulence, EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-11551, https://doi.org/10.5194/egusphere-egu25-11551, 2025.
