The effect of geomagnetic activity on north polar currents in winter

Robinson, P.R.; Dowswell, H.J.; Hamilton, R.A.. 1987 The effect of geomagnetic activity on north polar currents in winter. Journal of Atmospheric and Terrestrial Physics, 49 (2). 145-152. 10.1016/0021-9169(87)90049-3

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Official URL: http://dx.doi.org/10.1016/0021-9169(87)90049-3

Abstract/Summary

Average north polar currents for the winter season have been derived from geomagnetic hourly means at six levels of geomagnetic activity. The twin-vortex pattern, normally associated with more disturbed conditions, persisted even on the quietest (mean Ap ≈ 1) days. When Ap increased to 24, the Harang discontinuity appeared earlier by about 3.5 h, though the current system as a whole remained unchanged in orientation. The average quiet day seems to be associated with a weak IMF oriented northwards and towards the Sun, with a low solar wind velocity and low proton temperature.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1016/0021-9169(87)90049-3
ISSN:	00219169
Date made live:	18 Apr 2019 08:19 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/522946

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1016/0021-9169(87)90049-3

ISSN:

00219169

Date made live:

18 Apr 2019 08:19 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/522946