High time-resolution imaging of auroral arc deformation at substorm onset

Details High time-resolution imaging of auroral arc deformation at substorm onset High time-resolution imaging of auroral arc deformation at substorm onset

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988p%26ss...36..715s&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 36, July 1988, p. 715-723, 725-732.

Physics

10

Atmospheric Electricity, Atmospheric Models, Auroral Arcs, Current Sheets, Magnetic Storms, Temporal Resolution, Atmospheric Boundary Layer, Auroral Zones, Eiscat Radar System (Europe), Kelvin-Helmholtz Instability

Scientific paper

Observations of auroral disturbances such as westward-traveling surges, omega bands, and auroral folds are by necessity usually made when the luminous features have acquired their characteristic geometry; i.e., after the actual formation process. An event in which the initial brightening of an arc develops into a series of auroral spirals and finally into a westward-traveling surge is demonstrated. Two intervals of spiral formation were observed, but only the second of these generated a surgelike feature. Since the surge formation occurred on a time-scale of a few seconds, this type of observation can only be made with high-time-resolution imaging devices. The auroral developments took place in the zenith above Kiruna, where they were recorded by ground-based monochromatic imagers. The subsequent poleward expansion of the activity was observed by the EISCAT incoherent scatter radar 200 km to the north of the initial activation. These observations are discussed in the light of existing substorm theories, and it is proposed that the instability responsible for the final break-up of the arc is self-destructive.

Affiliated with

Also associated with

No associations

Rating

High time-resolution imaging of auroral arc deformation at substorm onset does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with High time-resolution imaging of auroral arc deformation at substorm onset, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High time-resolution imaging of auroral arc deformation at substorm onset will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1424306