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| Titel |
Observations of lunar tides in the mesosphere and lower thermosphere at Arctic and middle latitudes |
| VerfasserIn |
D. J. Sandford, H. G. Muller, N. J. Mitchell |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 6, no. 12 ; Nr. 6, no. 12 (2006-09-13), S.4117-4127 |
| Datensatznummer |
250004110
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| Publikation (Nr.) |
 copernicus.org/acp-6-4117-2006.pdf |
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| Zusammenfassung |
| Meteor radars have been used to measure the horizontal winds in the
mesosphere and lower thermosphere over Castle Eaton (52° N) in the UK and
over Esrange (68° N) in Arctic Sweden. We consider a 16-year data set
covering the interval 1988–2004 for the UK and a 6-year data set covering
the interval 1999–2005 for the Arctic. The signature of the 12.42-h
(M2) lunar tide has been identified at both locations. The lunar tide
is observed to reach amplitudes as large as 11 ms−1. The Arctic radar
has an interferometer and so allows investigation of the vertical structure
of the lunar tide. At both locations the tide has maximum amplitudes in
winter with a second autumnal maximum. The amplitude is found to increase
with height over the 80–100 km height range observed. Vertical wavelengths
are very variable, ranging from about 15 km in summer to more than 60 km in
winter. Comparisons with the Vial and Forbes (1994) model reveals generally
good agreement, except in the case of the summer vertical wavelengths which
are observed to be significantly shorter than predicted. |
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