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| Titel |
A nonlinear interaction event between a 16-day wave and a diurnal tide from meteor radar observations |
| VerfasserIn |
K. M. Huang, A. Z. Liu, S. D. Zhang, F. Yi, C. M. Huang, Q. Gan, Y. Gong, Y. H. Zhang |
| 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 ; 31, no. 11 ; Nr. 31, no. 11 (2013-11-21), S.2039-2048 |
| Datensatznummer |
250086149
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| Publikation (Nr.) |
 copernicus.org/angeo-31-2039-2013.pdf |
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| Zusammenfassung |
| Relative to extensive studies of interactions between the quasi 2-day wave
and tides, nonlinear interaction of the 16-day wave with tides was reported
less, in particular interaction with the diurnal tide. We present an
observational study of a possible nonlinear interaction event between the
16-day wave and the diurnal tide based on meteor radar measurement at Maui.
An obvious 16-day wave can be observed from raw wind data. Its maximum
meridional wind amplitude can attain 18.0 m s−1 at a height of 92 km
during the time of our attention, which is larger than that in previous
reports. Sum and difference interactions between the 16-day wave and the
diurnal tide are observed to have rather different intensities. Because sum
nonlinear interaction is very intense, the secondary sum wave with a period
of 22.59 h is stronger than the diurnal tide. However, weak spectrum of the
secondary difference wave is hardly identified. The beat of the diurnal tide
with the secondary sum wave leads to substantial modulation of the diurnal
tide at a period of 16 days. Moreover, this strong secondary sum wave further
interacts with the 16-day wave to generate a new secondary wave with a period
of 21.33 h. Such an interaction may be also regarded as a third-order
nonlinear interaction between the 16-day wave and the diurnal tide with
two-step interaction. Hence, the third-order nonlinear interaction between
planetary waves and tides may occur significantly in the MLT region. |
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