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| Titel |
Winds and tides in the mid-latitude Southern Hemisphere upper mesosphere recorded with the Falkland Islands SuperDARN radar |
| VerfasserIn |
R. E. Hibbins, M. P. Freeman, S. E. Milan, J. M. Ruohoniemi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 29, no. 11 ; Nr. 29, no. 11 (2011-11-04), S.1985-1996 |
| Datensatznummer |
250017121
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| Publikation (Nr.) |
 copernicus.org/angeo-29-1985-2011.pdf |
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| Zusammenfassung |
| Meteor wind data from the first year of operation of the Falkland Islands
SuperDARN radar (52° S, 59° W) are used to characterize the
atmospheric tides and background winds in the upper mesosphere above the
South Atlantic. Strong (>40 m s−1) semidiurnal tides are observed in
the winter time and large amplitude (>60 m s−1) bursts of quasi
two-day wave activity are seen in January 2011. Data are in good agreement
with those presented from the SAAMER meteor radar (54° S, 68° W).
Comparison with SuperDARN meteor wind data from a geographically similar
Northern Hemisphere site at Goose Bay (53° N 60° W) reveal clear
interhemispheric differences especially in the semidiurnal and terdiurnal
components of the tides. The winter time amplitudes of the tides are much
stronger in the Southern Hemisphere than in the north. Background winds are
observed to be significantly more polewards and westwards throughout the
year than those predicted by the empirical horizontal wind model HWM07. |
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