EGU24-6886, updated on 08 Mar 2024
https://doi.org/10.5194/egusphere-egu24-6886
EGU General Assembly 2024
© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Energy transfer of imbalanced Alfvénic turbulence in the heliosphere

Liping Yang1, Jiansen He2, Daniel Verscharen3, Hui Li4, Trevor A. Bowen5, Stuart D. Bale5, Honghong Wu7, Wenya Li8, Ying Wang, Lei Zhang9, Xueshang Feng1, and Ziqi Wu2
Liping Yang et al.
  • 1SIGMA Weather Group, State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, 100190 Beijing, People’s Republic of China (lpyang@swl.ac.cn)
  • 2School of Earth and Space Sciences, Peking University, 100871 Beijing, People’s Republic of China.
  • 3Mullard Space Science Laboratory, University College London, Surrey RH5 6NT, UK.
  • 4Theoretical Division, Los Alamos National Laboratory, Los Alamos NM 87545, USA.
  • 5Space Sciences Laboratory, University of California, Berkeley, CA 94720-7450, USA.
  • 7Electronic Information, Wuhan University, 430072 Wuhan, People’s Republic of China.
  • 8State Key Laboratory of Space Weather, National Space Science Center, Chinese Academy of Sciences, 100190 Beijing, People’s Republic of China.
  • 9China Academy of Aerospace Science and Innovation, 100190 Beijing, People’s Republic of China.

Imbalanced Alfvénic turbulence is a universal process playing a crucial role in energy transfer in space, astrophysical, and laboratory plasmas. A funda-
mental and long-lasting question about the imbalanced Alfvénic turbulence is how and through which mechanism the energy transfers between scales. Here, we show that the energy transfer of imbalanced Alfvénic turbulence is completed by coherent interactions between Alfvén waves and co-propagating anomalous fluctuations. These anomalous fluctuations are generated by nonlinear couplings instead of linear reflection. We also reveal that the energy transfer of the waves and the anomalous fluctuations is carried out mainly through local-scale and large-scale nonlinear interactions, respectively, responsible for their bifurcated power-law spectra. This work unveils the energy transfer physics of imbalanced Alfvénic turbulence, and advances the understanding of imbalanced Alfvénic turbulence observed by Parker Solar Probe in the inner heliosphere.

How to cite: Yang, L., He, J., Verscharen, D., Li, H., Bowen, T. A., Bale, S. D., Wu, H., Li, W., Wang, Y., Zhang, L., Feng, X., and Wu, Z.: Energy transfer of imbalanced Alfvénic turbulence in the heliosphere, EGU General Assembly 2024, Vienna, Austria, 14–19 Apr 2024, EGU24-6886, https://doi.org/10.5194/egusphere-egu24-6886, 2024.