Rights statement: 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.
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Final published version
Licence: CC BY: Creative Commons Attribution 4.0 International License
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Multi‐instrument Observations of Ion‐Neutral Coupling in the Dayside Cusp
AU - Billett, Daniel
AU - Hosokawa, K.
AU - Grocott, Adrian
AU - Wild, Jim
AU - Aruliah, A.
AU - Ogawa, Y.
AU - Taguchi, S.
AU - Lester, M.
N1 - 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.
PY - 2020/2/28
Y1 - 2020/2/28
N2 - 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.
AB - 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.
KW - ionosphere
KW - neutral wind
KW - ion-neutral coupling
KW - ion-drag
KW - superdarn
KW - fpi
U2 - 10.1029/2019GL085590
DO - 10.1029/2019GL085590
M3 - Journal article
VL - 47
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 4
M1 - e2019GL085590
ER -