Other
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm21b..09m&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #SM21B-09
Other
2407 Auroral Ionosphere (2704), 2409 Current Systems (2708), 2411 Electric Fields (2712), 2730 Magnetosphere: Inner
Scientific paper
Results are presented on auroral electric field structures using Cluster data obtained near perigee, where the four Cluster spacecraft are aligned as pearls on a string. Intense highly structured electric fields are frequently observed on auroral field lines by Cluster during substorm activity. The scale sizes are typically 5-20 km (at the ionospheric level) and field magnitudes up to 150 mV/m are observed. With a time separation of a few minutes between the four satellites the temporal evolution and stability of the structures can be investigated in detail. The stability of the structures is found to depend strongly on the substorm activity level. During oval expansion the structures are very dynamic and change shape and polarity but otherwise the structures can be fairly stable over 100 s.The more stable structures are associated with field-aligned currents and energetic electron transition regions associated with steep gradients in the satellite potential. For the more stable structures it is likely that they represent the high-altitude extension of quasi-stationary auroral potential structures. The Cluster data may further be used to reveal the specific form of the auroral potential structures and their stability.
André Martial
Buchert Stephan
Gustafsson Georg
Ivchenko Nickolay
Karlsson Torgny
No associations
LandOfFree
Auroral Electric Fields Observed by Cluster Near Perigee 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 Auroral Electric Fields Observed by Cluster Near Perigee, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Auroral Electric Fields Observed by Cluster Near Perigee will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1383261