Multi‐instrument Observations of Ion‐Neutral Coupling in the Dayside Cusp

Billett, Daniel and Hosokawa, K. and Grocott, Adrian and Wild, Jim and Aruliah, A. and Ogawa, Y. and Taguchi, S. and Lester, M. (2020) Multi‐instrument Observations of Ion‐Neutral Coupling in the Dayside Cusp. Geophysical Research Letters, 47 (4). ISSN 0094-8276

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Abstract

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.

Item Type:
Journal Article
Journal or Publication Title:
Geophysical Research Letters
Additional Information:
Accepted for publication in Geophysical Research Letters. Copyright 2020 American Geophysical Union. Further reproduction or electronic distribution is not permitted. An edited version of this paper was published by AGU. Copyright 2020 American Geophysical Union. Billett, D. D., Hosokawa, K., Grocott, A., Wild, J. A., Aruliah, A. L., Ogawa, Y., et al ( 2020). Multi‐instrument Observations of Ion‐Neutral Coupling in the Dayside Cusp. Geophysical Research Letters, 47, e2019GL085590. https://doi.org/10.1029/2019GL085590 To view the published open abstract, go to http://dx.doi.org and enter the DOI.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/1900
Subjects:
ID Code:
140973
Deposited By:
Deposited On:
03 Feb 2020 09:35
Refereed?:
Yes
Published?:
Published
Last Modified:
31 Oct 2020 06:57