Physics
Scientific paper
Jun 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29l..26s&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 12, pp. 26-1, CiteID 1586, DOI 10.1029/2001GL014388
Physics
1
Ionosphere: Modeling And Forecasting, Atmospheric Composition And Structure: Airglow And Aurora, Ionosphere: Ionosphere/Magnetosphere Interactions (2736), Ionosphere: Midlatitude Ionosphere, Ionosphere: Electric Fields (2712)
Scientific paper
Polarization Jet (PJ), also known as Sub-Auroral Ion Drift (SAID), events are supersonic westward plasma drifts on the equatorward edge of the diffuse aurora in the evening and nighttime sector. Their optical F-region signatures are weak 630.0 nm red arcs colocated with regions of fast convection. These weak arcs resemble Stable Auroral Red (SAR) arcs observed during the recovery phase of magnetic storms, but have lower intensities, shorter lifetimes, and occur without a significant heat flux from the magnetosphere. Previous model studies underestimated the brightness of weak SAR arcs. We present calculations showing that ion-neutral collisional heating and ion composition changes during PJ events may be an additional source of 630.0 nm emission, and propose experimental tests that could verify our modeling results.
Fejer Bela G.
Gal'perin Yu I.
Grigoriev S. A.
Mendillo Michael
Sazykin Stanislav
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