On the variability of tidal constants induced by the influence of one subsystem on another |
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| Authors: | B A Kagan D A Romanenkov |
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| Institution: | (1) Shirshov Institute of Oceanology (St. Petersburg Branch), Russian Academy of Sciences, Pervaya liniya 30, Vasil’evskii ostrov, St. Petersburg, 199053, Russia |
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| Abstract: | It is stated that the seasonal variation of tidal constants may be generated through a mechanism related to the influence of one subsystem on another. This statement is verified on the basis of the three-dimensional nonlinear finite-element thermohydrodynamic model QUODDY-4, which is used to investigate the tidal dynamics of the wave M 2 in the system of the White and Barents seas. It is testified that the freezing of the White Sea and the resulting fixed ice cover change the tidal characteristics in the other subsystem—the nonfreezing Barents Sea. Here (especially, in the southern part of the Barents Sea, adjacent to the boundary of the White Sea), the relative variations in the amplitude of tidal sea surface level elevations and the maximum barotropic tidal velocity may constitute up to 75%, and the variation in phases of tidal sea surface level elevations may cover a few tens of degrees. It follows that the seasonal variability of tidal constants induced by the influence of one subsystem on another may in principal occur and there are no good grounds for its disregard, as has been done usually. |
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