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High-time resolution radar observations of high-latitude flows during an isolated substorm

Wild, J.A. and Yeoman, T.K. and Davies, J.A. (2000) High-time resolution radar observations of high-latitude flows during an isolated substorm. In: Proceedings of the SuperDARN Workshop, 1900-01-01.

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Abstract

High-time resolution CUTLASS observations and ground-based magnetometers have been employed to study the occurrence of vortical flow structures propagating through the high-latitude ionosphere during magnetospheric substorms. Fast-moving flow vortices (~800 m/s) associated with Hall currents flowing around upward directed feld-aligned currents are frequently observed propagating at high speed (~1 km/s) azimuthally away from the region of the ionosphere associated with the location of the substorm expansion phase onset. Furthermore, a statistical analysis drawn from over 1000 h of high-time resolution, nightside radar data has enabled the characterisation of the bulk properties of these vortical flow systems. Their occurrence with respect to substorm phase has been investigated and a possible generation mechanism has been suggested.

Item Type: Conference or Workshop Item (Other)
Journal or Publication Title: Proceedings of the SuperDARN Workshop
Subjects: Q Science > QB Astronomy
Departments: Faculty of Science and Technology > School of Computing & Communications
Faculty of Science and Technology > Physics
ID Code: 28131
Deposited By: Dr Steve Marple
Deposited On: 10 Nov 2009 15:07
Refereed?: Yes
Published?: Published
Last Modified: 09 Apr 2014 20:51
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/28131

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