CUTLASS HF radar observations of high-latitude azimuthally propagating vortical currents in the nightside ionosphere during magnetospheric substorms

Wild, J. A. and Yeoman, T. K. (2000) CUTLASS HF radar observations of high-latitude azimuthally propagating vortical currents in the nightside ionosphere during magnetospheric substorms. Annales Geophysicae, 18 (6). pp. 640-652. ISSN 0992-7689

Full text not available from this repository.

Abstract

High-time resolution CUTLASS observations and ground-based magnetometers have been employed to study the occurrence of vortical fl ̄ow 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 field-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: Journal Article
Journal or Publication Title: Annales Geophysicae
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/1900/1912
Subjects:
Departments: Faculty of Science and Technology > School of Computing & Communications
Faculty of Science and Technology > Physics
ID Code: 81948
Deposited By: ep_importer_pure
Deposited On: 07 Oct 2016 23:00
Refereed?: Yes
Published?: Published
Last Modified: 28 Feb 2020 00:55
URI: https://eprints.lancs.ac.uk/id/eprint/81948

Actions (login required)

View Item View Item