Forced waves involve some problems concerning long oceanic waves, and are considered less interesting than short wind waves (which are forced by wind). They are often thought to have the same, or longer, period interval as tides and seiches.
A well-known forced wave is the induced tide (tide oscillation), which develops in semiclosed basins by the induction of the true tides ( autonomous tides) acting in a nearby open sea. The eigenperiods in oscillating basins can be close to tide periods (diurnal, semidiurnal, or others); therefore the induced tide can be reinforced by resonance. Tide-forced waves have many properties similar to the tide-wave properties; but other forced waves also appear in oceans (Henderschott, 1973).
Forced waves are induced by wind or by atmospheric pressure differences; they appear only if wind or pressure differences occur periodically. For example, in some cases low pressure systems can pass over a sea about every 3 days or every 5 days; in consequence of the...
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References
Hendershott, M. C., 1973. Inertial oscillation of tidal period, in B. Warren, ed., Progress in Oceanography, Vol. 6. New York: Pergamon Press, 1–27.
Manca, B.; Mosetti, F.; and Zennaro, P., 1974. Analisi spettrale delle Sesse dell 'Adriatico, Boll. Geof. Teorica e Appl. (Trieste) 16, 51–60.
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© 1982 Hutchinson Ross Publishing Company
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Mosetti, F. (1982). Forced waves . In: Beaches and Coastal Geology. Encyclopedia of Earth Sciences Series. Springer, New York, NY. https://doi.org/10.1007/0-387-30843-1_196
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DOI: https://doi.org/10.1007/0-387-30843-1_196
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