A negative test of orbital control of geomagnetic reversals and excursions

Dennis Kent, J. Carlut

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A ˜41 Kyr periodic component has been reported in some sedimentary paleointensity records, allowing speculation that there may be some component of orbital control of geomagnetic field generation such as by obliquity modulation. However, no discernable tendency is found for astronomically-dated geomagnetic reversals in the Plio-Pleistocene (0 to 5.3 Ma) or excursions in the Brunhes (0 to 0.78 Ma) to occur at a consistent amplitude or phase of obliquity cyclicity, nor of orbital eccentricity. An implication is that paleointensity lows which are characteristically associated with these features are not distributed in a systematic way relative to obliquity and eccentricity, supporting the idea that orbital forcing does not power the geodynamo.

Original languageEnglish (US)
Pages (from-to)3561-3564
Number of pages4
JournalGeophysical Research Letters
Volume28
Issue number18
DOIs
StatePublished - Sep 15 2001

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magnetic reversal
obliquity
eccentricity
orbitals
orbital forcing
geodynamo
Brunhes chron
cyclicity
geomagnetism
geomagnetic field
tendencies
Pleistocene
modulation
test

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

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A negative test of orbital control of geomagnetic reversals and excursions. / Kent, Dennis; Carlut, J.

In: Geophysical Research Letters, Vol. 28, No. 18, 15.09.2001, p. 3561-3564.

Research output: Contribution to journalArticle

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