Spatial variations of ionospheric conductivity and radar auroral amplitude in the eastward electrojet region during pre-substorm conditions
Item
Title (Dublin Core)
en-US
Spatial variations of ionospheric conductivity and radar auroral amplitude in the eastward electrojet region during pre-substorm conditions
Description (Dublin Core)
en-US
The dependence of auroral backscatter amplitude on different ionospheric parameters (conductivity, current density, electric field) is studied by means of data recorded by STARE (Scandinavian Twin Auroral Radar Experiment), the two-dimensional Scandinavian Magnetometer Array (SMA), and auroral all-sky cameras. The observations were made on 16 March 1978 during pre-substorm conditions in the region of the eastward polar electrojet. The paper shows that in this event the auroral backscatter amplitudes in the 140 MHz frequency band were controlled mainly by spatial variations in the electron density or conductivity inside the back-scatter volume. To a certain extent also a linear relationship between backscatter amplitude and ionospheric current density was found but it is regarded as a special case of a more general relationship between electron density and backscatter amplitude. A stable discontinuity in the Hall conductivity over the most equatorward auroral arc was deduced from the data: On the equatorward side the conductivity was 3-5 times higher than on the nearby poleward side. Our conclusions are discussed in the light of some previously published results on the same subject.
ARK: https://n2t.net/ark:/88439/y000016
Permalink: https://geophysicsjournal.com/article/262
ARK: https://n2t.net/ark:/88439/y000016
Permalink: https://geophysicsjournal.com/article/262
Creator (Dublin Core)
Uspensky, M.V.
Pellinen, R.J.
Baumjohann, W.
Starkov, G.V.
Nielsen, E.
Sofko, G.
Kaila, K.U.
Subject (Dublin Core)
en-US
Radar aurora
en-US
Eastward electrojet
en-US
Substorm growth phase
en-US
Hall conductivity
en-US
Backscatter amplitude
en-US
Atmosphere
Publisher (Dublin Core)
en-US
Journal of Geophysics
Date (Dublin Core)
1983-02-24
Type (Dublin Core)
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
en-US
Peer-reviewed Article
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
https://journal.geophysicsjournal.com/JofG/article/view/262
Source (Dublin Core)
en-US
Journal of Geophysics; Vol 52 No 1 (1983): Journal of Geophysics; 40-48
2643-2986
2643-9271
Language (Dublin Core)
eng
Relation (Dublin Core)
https://journal.geophysicsjournal.com/JofG/article/view/262/220