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https://hdl.handle.net/2440/12536
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Type: | Journal article |
Title: | Global-scale tidal variability during the PSMOS campaign of June-August 1999: interaction with planetary waves |
Author: | Pancheva, D. Merzlyakov, E. Mitchell, N. Portnyagin, Y. Manson, A. Jacobi, C. Meek, C. Luo, Y. Clark, R. Hocking, W. MacDougall, J. Muller, H. Kurschner, D. Jones, G. Vincent, R. Reid, I. Singer, W. Igarashi, K. Fraser, G. Fahrutdinova, A. et al. |
Citation: | Journal of Atmospheric and Solar: Terrestrial Physics, 2002; 64(17):1865-1896 |
Publisher: | Pergamon-Elsevier Science Ltd |
Issue Date: | 2002 |
ISSN: | 1364-6826 1879-1824 |
Abstract: | During the PSMOS Global-scale tidal variability experiment campaign of June 1–August 31, 1999, a network of radars made measurements of winds, waves and tides in the mesosphere/lower-thermosphere region over a wide range of latitudes. Clear evidence was found that fluctuations in tidal amplitudes occur on a global scale in both hemispheres, and that at least some of these fluctuations are periodic in nature. Modulation of the amplitude of the 12 h tide was particularly evident at periods of 10 and 16 days, suggesting a non-linear interaction with planetary waves of those periods to be responsible. In selected cases, the secondary waves predicted from non-linear theory could be identified and their zonal wave numbers determined. In some, but not all, cases the longitudinal structure of the secondary waves supports the theory of planetary-wave/tidal interaction being responsible for the observed tidal modulation. It was noted also that beating between a 12.4-lunar and the solar tide could produce a near 16-day modulation of the 12 h tide amplitude that is frequently observed in late summer. |
Keywords: | MLT region dynamics Tidal variability Non-linear interactions Lunar tide |
DOI: | 10.1016/S1364-6826(02)00199-2 |
Published version: | http://dx.doi.org/10.1016/s1364-6826(02)00199-2 |
Appears in Collections: | Aurora harvest 7 Physics publications |
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