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| Titel |
Moon influence on equatorial atmospheric angular momentum |
| VerfasserIn |
Christian Bizouard, Leonid Zotov, Nikolay Sidorenkov |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250092163
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| Publikation (Nr.) |
 EGU/EGU2014-6488.pdf |
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| Zusammenfassung |
| The variation of the equatorial atmospheric angular momentum function, coordinated with
respect to a star-fixed system, is investigated in relation with the lunar tide. We isolate the
rapid fluctuations, below 30 days, where Moon motion has a possible influence. First we
notice that pressure term and wind term are almost proportional, by contrast to celestial
seasonal band (S1). This would mean that, in this frequency band, the torque of the
atmosphere on the solid Earth mostly results from the equatorial bulge. Spectrum reveals
sharp lunar tidal peaks at 13.66 days (O1 diurnal tide in the terrestrial frame) and 13.63 days,
reflecting the Moon influence on meridional circulation. We also observe powerful
episodic fluctuations between 5 and 8 days (up to 10 mas), possibly resulting from non
linear effect of the O1 tide, or tidal waves 2Q1 (6.86 days) and Ïă1 (7.095 days). |
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