Geomagnetic storms in the Antarctic F-region. I. Diurnal and seasonal patterns for main phase effects

Wrenn, G.L.; Rodger, Alan S.; Rishbeth, H.. 1987 Geomagnetic storms in the Antarctic F-region. I. Diurnal and seasonal patterns for main phase effects. Journal of Atmospheric and Terrestrial Physics, 49 (9). 901-913. 10.1016/0021-9169(87)90004-3

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Official URL: http://dx.doi.org/10.1016/0021-9169(87)90004-3

Abstract/Summary

New analysis procedures are used to show that the main phase mid-latitude storm effects conform to consistent patterns in local time when suitable selection rules are applied, with averaging over several years. Changes in ƒ ƒoF2 , with respect to estimated quiet-time values, are analysed in terms of ap(τ), a new geomagnetic index derived to take account of integrated disturbance. Reduction of ƒ ƒoF2 is greatest during the early morning hours, in summer, at higher geomagnetic latitudes, near solar minimum and through the more active periods. The various dependencies are quantitatively determined for the first time by creating an average ‘steady state’ disturbance, rather than following specific storm events. This approach will permit tests of competing theories using available modelling programs.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1016/0021-9169(87)90004-3
ISSN:	00219169
Date made live:	24 Apr 2019 11:30 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/523024

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1016/0021-9169(87)90004-3

ISSN:

00219169

Date made live:

24 Apr 2019 11:30 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/523024