Periodicities of palaeomagnetic intensity and palaeoclimatic variations - A Walsh spectral approach

Details Periodicities of palaeomagnetic intensity and palaeoclimatic variations - A Walsh spectral approach Periodicities of palaeomagnetic intensity and palaeoclimatic variations - A Walsh spectral approach

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984e%26psl..70..139n&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 70, no. 1, Sept. 1984, p. 139-147.

Physics

9

Climatology, Paleomagnetism, Periodic Variations, Power Spectra, Walsh Function, Climate Change, Magnetic Flux, Paleoclimatology, Statistical Analysis

Scientific paper

The Walsh power-spectral technique has been applied to the nonsinusoidal paleoclimatic (the Globorotalia menardii climatic curve) and paleomagnetic-intensity-variation records of the last 1.2 Myr. The analysis reveals, in the case of paleomagnetic variations, statistically significant peaks (at 90-percent confidence level) centered around 150, 60 and 24 kyr. The paleoclimatic spectrum, however, indicates only two significant peaks of 60 and 24 kyr. The identical periodicities in both the phenomena may suggest a causal link between the geomagnetic intensity variations and climatic changes.

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