A theory of atmospheric tides generated by the differential heating between land and sea |
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| Authors: | F B A Giwa L A Hussain |
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| Institution: | (1) Physics Department, University of Ibadan, Nigeria |
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| Abstract: | Summary The differential heating between land and sea is incorporated into the theory of atmospheric tides. This involves the representation of the land and sea distribution by a set of Fourier series.The theory postulates the existence of waves of angular speeds different from the angular velocity of the earth with some of the waves travelling from West to East instead of the usual East to West.By considering the diurnal variation of eddy diffusion of heat energy absorbed close to the surface, the semidiurnal standing waves at the poles was calculated by the application of this theory. The order of magnitude of the calculated tides agreed well with observation, though, contrary to observation, the calculated amplitude at the South pole is larger than that at the North pole.It is also shown that the polar standing oscillation is caused mainly by the land and sea distribution between 75°N and 45°S. |
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| Keywords: | Atmospheric tides Differential heating Sea-land distribution |
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