A case study of storm commencement and recovery plasmaspheric electric fields near L=2.5 at equinox
Balmforth, H. F.; Clilverd, M. A. ORCID: https://orcid.org/0000-0002-7388-1529; Smith, A. J.. 1994 A case study of storm commencement and recovery plasmaspheric electric fields near L=2.5 at equinox. Annales Geophysicae, 12 (7). 625-635. https://doi.org/10.1007/s00585-994-0625-z
Full text not available from this repository. (Request a copy)Abstract/Summary
Data from the VLF Doppler experiment at Faraday, Antarctica (65○ S, 64○ W) are used to study the penetration of the high-latitude convection electric field to lower latitudes during severely disturbed conditions. Alterations of the electric field at L-values within the range 2.0 - 2.7 are studied for two cases at equinox (10 - 12 September 1986 and 1 - 3 May 1986). The recovery of the electric field is found to be approximately an exponential function of time. Values for the equatorial meridional E×B drift velocity, inferred from the data, are used as inputs to a model of the plasmasphere and ionosphere. The model and experimental results are used to investigate the post-storm alteration of ionospheric coupling processes. The magnitude of the effect of ionosphere-plasmasphere coupling fluxes on NmF2 values and the O+-H+ transition height is dependent on the local time of storm commencement, and on the orientation of the electric field. The coupling fluxes appear to have a maximum influence on ionospheric content during the main phase of geomagnetic activity that produces outward motion of plasmaspheric whistler ducts.
Item Type: | Publication - Article |
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Digital Object Identifier (DOI): | https://doi.org/10.1007/s00585-994-0625-z |
Programmes: | BAS Programmes > Pre 2000 programme |
ISSN: | 1432-0576 |
Date made live: | 17 Jan 2017 13:46 +0 (UTC) |
URI: | https://nora.nerc.ac.uk/id/eprint/515908 |
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