Multi-instrument Observations of Ion-Neutral Coupling in the Dayside Cusp
- 1Physics Department, Lancaster University, Lancaster, United Kingdom (j.wild@lancaster.ac.uk)
- 2Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Canada (daniel.billett@usask.ca)
- 3Department of Communication Engineering and Informatics, University of Electro-Communications, Tokyo, Japan
- 4Department of Physics and Astronomy, University College London, London, United Kingdom
- 5National Institute of Polar Research, Tokyo, Japan
- 6Graduate School of Science, Kyoto University, Kyoto, Japan
- 7Department of Physics and Astronomy, University of Leicester, Leicester, United Kingdom
Using data from the Scanning Doppler Imager, the Super Dual Auroral Radar Network, the EISCAT Svalbard Radar and an auroral all-sky imager, we examine an instance of F-region neutral winds which have been influenced by the presence of poleward moving auroral forms near the dayside cusp region. We observe a reduction in the time taken for the ion-drag force to re-orientate the neutrals into the direction of the convective plasma (on the order of minutes), compared to before the auroral activity began. Additionally, because the ionosphere near the cusp is influenced much more readily by changes in the solar wind via dayside reconnection, we observe the neutrals responding to an interplanetary magnetic field change within minutes of it occurring. This has implications on the rate that energy is deposited into the ionosphere via Joule heating, which we show to become dampened by the neutral winds.
How to cite: Wild, J., Billett, D., Hosokawa, K., Grocott, A., Aruliah, A., Ogawa, Y., Taguchi, S., and Lester, M.: Multi-instrument Observations of Ion-Neutral Coupling in the Dayside Cusp, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-11789, https://doi.org/10.5194/egusphere-egu2020-11789, 2020.
