Lockwood, M;
Moen, J;
Cowley, SWH;
Farmer, AD;
Løvhaug, UP;
Lühr, H;
Davda, VN;
(1993)
Variability of dayside convection and motions of the cusp/cleft aurora.
Geophysical Research Letters
, 20
(11)
1011 - 1014.
10.1029/93GL00846.
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Abstract
We present measurements of the ionospheric plasma flow over the range of invariant latitudes 71-76-degrees, observed at 10-second resolution using both the EISCAT radars, with simultaneous observations of the 630 nm cusp/cleft aurora made by a meridian-scanning photometer at Ny Alesund, Svalbard. A major increase in the trans-auroral voltage from 5 to 40 kV (associated with sunward convection in the early afternoon sector) is found to follow a southward motion of the aurora and coincide with the onset of regular transient auroral breakup events. It is shown that these observations are consistent with recent theoretical work on how ionospheric flows are excited by time-dependent reconnection at the dayside magnetopause.
| Type: | Article |
|---|---|
| Title: | Variability of dayside convection and motions of the cusp/cleft aurora |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1029/93GL00846 |
| Publisher version: | http://dx.doi.org/10.1029/93GL00846 |
| Language: | English |
| Additional information: | Copyright 1993 by the American Geophysical Union |
| Keywords: | Interplanetary magnetic-field, North-south component, Polar cusp, Latitude, Dependence, Time, IMF |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/104046 |
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