Atmospheric tide: Difference between revisions
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{{Term | |||
|Display title=atmospheric tide | |||
|Definitions={{Definition | |||
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|Meaning=(''Also called'' atmospheric oscillation.) Defined in analogy to the oceanic [[tide]] as an atmospheric motion of the [[scale]] of the earth, in which vertical accelerations are neglected (but [[compressibility]] is taken into account). | |||
|Explanation=Both the sun and moon produce atmospheric tides, and there exist both [[gravitational tides]] and [[thermal tides]]. The [[harmonic]] component of greatest [[amplitude]], the 12-hour or semidiurnal [[solar atmospheric tide]], is both gravitational and thermal in origin, the fact that it is greater than the corresponding [[lunar atmospheric tide]] being ascribed usually to a [[resonance]] in the [[atmosphere]] with a free [[period]] very close to the tidal period. Other tides of 6, 8, 12, and 24 hours have been observed.<br/> Chapman, S. 1951. Compendium of Meteorology. 510–530. | |||
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Latest revision as of 21:47, 13 January 2024
(Also called atmospheric oscillation.) Defined in analogy to the oceanic tide as an atmospheric motion of the scale of the earth, in which vertical accelerations are neglected (but compressibility is taken into account).
Both the sun and moon produce atmospheric tides, and there exist both gravitational tides and thermal tides. The harmonic component of greatest amplitude, the 12-hour or semidiurnal solar atmospheric tide, is both gravitational and thermal in origin, the fact that it is greater than the corresponding lunar atmospheric tide being ascribed usually to a resonance in the atmosphere with a free period very close to the tidal period. Other tides of 6, 8, 12, and 24 hours have been observed.
Chapman, S. 1951. Compendium of Meteorology. 510–530.
