A case study of storm commencement and recovery plasmaspheric electric fields near L=2.5 at equinox
Item
Title (Dublin Core)
A case study of storm commencement and recovery plasmaspheric electric fields near L=2.5 at equinox
Description (Dublin Core)
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 <i>L</i>-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 <strong>E</strong>×<strong>B</strong> 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 <i>N</i><sub>m</sub><i>F</i>2 values and the O<sup>+</sup>-H<sup>+</sup> 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.
Creator (Dublin Core)
Balmforth, H. F.
Clilverd, M. A.
Smith, A. J.
Date (Dublin Core)
2018-09-27
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.1007/s00585-994-0625-z
https://angeo.copernicus.org/articles/12/625/1994/
Source (Dublin Core)
eISSN: 1432-0576
Language (Dublin Core)
eng
