Abstract
As is well known, the semidiurnal barometric oscillations indicate that the atmosphere has a free oscillation of a period of 12 hours1. On the other hand, G. I. Taylor's evidence2 from the propagation of waves of explosion points to a free period of 10½ hours. Moreover, the diurnal variation of the earth's magnetic field, when interpreted by the dynamo theory, shows3 that at the upper conducting layer the pressure oscillations are nearly 180° out of phase with the observed pressure oscillations at the ground. Also, the required conductivity of the layer is larger than the value that can be inferred from radio soundings.
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References
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PEKERIS, C. Atmospheric Oscillations. Nature 138, 642–643 (1936). https://doi.org/10.1038/138642a0
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DOI: https://doi.org/10.1038/138642a0
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