Aruliah, AL;
Rees, D;
Steen, A;
(1991)
Seasonal and solar cycle variations in high-latitude thermospheric winds.
Geophysical Research Letters
, 18
(11)
1983 - 1986.
10.1029/91GL02240.
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Abstract
Thermospheric wind measurements have been collected systematically every winter for over nine years from a high-latitude site at Kiruna, Sweden (67.8-degrees-N, 20.4-degrees-E). The database contains 1242 nights of data collected with a Fabry-Perot Interferometer (FPI), perhaps the largest single- site database of thermospheric winds. This analysis shows a marked seasonal and solar cycle variation. Particularly at high solar activity, sunward winds of the evening period (16 - 20 UT) are more than 50% stronger at Spring than at Autumn equinox. This large asymmetry in the behaviour of high-latitude thermospheric winds at spring and autumn equinox has not yet been predicted by model simulations.
| Type: | Article |
|---|---|
| Title: | Seasonal and solar cycle variations in high-latitude thermospheric winds |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1029/91GL02240 |
| Publisher version: | http://dx.doi.org/10.1029/91GL02240 |
| Language: | English |
| Additional information: | Copyright 1991 by the American Geophysical Union |
| Keywords: | Model, Circulation |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/144956 |
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