Title :
Small-scale structure on the poleward edge of a stable auroral red arc
Author :
Nicolls, Michael J. ; Kelley, Michael C. ; Erdogan, Can
Author_Institution :
Sch. of Electr. & Comput. Eng., Cornell Univ., Ithaca, NY, USA
fDate :
4/1/2005 12:00:00 AM
Abstract :
Here we present all-sky images of a stable auroral red arc collocated with the low-density trough. Small-scale, dynamic structure is observed on the poleward edge of the arc that may be caused by a crossed density/temperature gradient or by a collisional Kelvin-Helmholtz shear-flow instability in conjunction with a sufficient density gradient.
Keywords :
arcs (electric); aurora; plasma collision processes; plasma density; plasma diagnostics; plasma flow; plasma instability; plasma temperature; all-sky images; arc poleward edge; collisional Kelvin-Helmholtz shear-flow instability; crossed density/temperature gradient; low-density trough; small-scale dynamic structure; stable auroral red arc; Charge coupled devices; Charge-coupled image sensors; Electrons; Magnetosphere; Optical filters; Plasma density; Plasma stability; Plasma temperature; Satellites; Storms; Airglow; aurora; ionosphere; plasma instabilities; plasmasphere; red-line; ring current; stable auroral red (SAR) arc;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2005.845008
