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Title: On the longitudinal structure of the transient day-to-day variation of the semidiurnal tide in the mid-latitude lower thermosphere - I. Winter season
Authors: Merzlyakov, E. G.Portnyagin, Yu. I.Jacobi, C.Mitchell, N. J.Muller, H. G.Manson, A. H.Fachrutdinova, A. N.Singer, W.Hoffmann, P.
Publishers Version: https://doi.org/10.5194/angeo-19-545-2001
Issue Date: 2001
Published in: Annales Geophysicae, Volume 19, Issue 5, Page 545-562
Publisher: München : European Geopyhsical Union
Abstract: The longitudinal structure of the day-to-day variations of semidiurnal tide amplitudes is analysed based on coordinated mesosphere/lower thermosphere wind measurements at several stations during three winter campaigns. Possible excitation sources of these variations are discussed. Special attention is given to a nonlinear interaction between the semidiurnal tide and the day-to-day mean wind variations. Data processing includes the S-transform analysis which takes into account transient behaviour of secondary waves. It is shown that strong tidal modulations appear during a stratospheric warming and may be caused by aperiodic mean wind variations during this event.
Keywords: Meteorology and atmospheric dynamics (middle atmosphere dynamics; waves and tides)
DDC: 530
License: CC BY 3.0 Unported
Link to License: https://creativecommons.org/licenses/by/3.0/
Appears in Collections:Physik



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