Abstract
CRAIN et al.1 computed a power spectrum of the proportions of normal polarity measurements during the Phanerozoic, and their results were used as parameters for a stochastic model for geomagnetic reversals2. New data presented by McElhinny3 warrant a re-examination of the power spectrum of reversals during the Phanerozoic. Whereas Crain et al.1 used a hanning window in an attempt to minimize the end effects of the short record, a radically different approach, proposed by Burg4, is used in this note. The purpose of this letter is to point out the existence of a powerful new method for the analysis of short records.
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References
Crain, I. K., Crain, P. L., and Plant, M. G., Nature, 223, 283 (1969).
Crain, I. K., and Crain, P. L., Nature, 228, 39 (1970).
McElhinny, M. W., Science, 172, 157 (1971).
Burg, J. P., Geophysics, 36, 661 (1971).
Jones, R. A., Technometrics, 7, 531 (1965).
Blackman, R. B., and Tukey, J. W., The Measurement of Power Spectra (Dover, New York, 1958).
Toman, K., J. Geophys. Res., 70, 1749 (1965).
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ULRYCH, T. Maximum Entropy Power Spectrum of Long Period Geomagnetic Reversals. Nature 235, 218–219 (1972). https://doi.org/10.1038/235218a0
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DOI: https://doi.org/10.1038/235218a0
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