Geomagnetic excursions: knowns and unknowns
Geomagnetic excursions: knowns and unknowns
Geomagnetic excursions are short-lived episodes when Earth’s magnetic field deviates into an intermediate polarity state. Understanding the origin, frequency, amplitude, duration, and field behavior associated with excursions is a forefront research area within solid earth geophysics. Recent advances in excursion research are summarized here, and key further research is suggested to resolve major unanswered questions. Improving the global distribution of excursion records, particularly from the southern hemisphere, obtaining high-resolution sedimentary excursion records with good age control from sites with sedimentation rates >10 cm/kyr, obtaining volcanic excursion records coupled with high-precision geochronology, and estimating excursion duration with high chronological precision will all facilitate hypothesis testing concerning the deep earth dynamics that generate geomagnetic excursions.
paleomagnetism, geomagnetic field, excursion
L17307
Roberts, Andrew P.
4f062491-5408-4edb-8dd1-140c6a42e93f
2008
Roberts, Andrew P.
4f062491-5408-4edb-8dd1-140c6a42e93f
Roberts, Andrew P.
(2008)
Geomagnetic excursions: knowns and unknowns.
Geophysical Research Letters, 35, .
(doi:10.1029/2008GL034719).
Abstract
Geomagnetic excursions are short-lived episodes when Earth’s magnetic field deviates into an intermediate polarity state. Understanding the origin, frequency, amplitude, duration, and field behavior associated with excursions is a forefront research area within solid earth geophysics. Recent advances in excursion research are summarized here, and key further research is suggested to resolve major unanswered questions. Improving the global distribution of excursion records, particularly from the southern hemisphere, obtaining high-resolution sedimentary excursion records with good age control from sites with sedimentation rates >10 cm/kyr, obtaining volcanic excursion records coupled with high-precision geochronology, and estimating excursion duration with high chronological precision will all facilitate hypothesis testing concerning the deep earth dynamics that generate geomagnetic excursions.
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Published date: 2008
Keywords:
paleomagnetism, geomagnetic field, excursion
Organisations:
Ocean and Earth Science, National Oceanography Centre,Southampton
Identifiers
Local EPrints ID: 63852
URI: http://eprints.soton.ac.uk/id/eprint/63852
ISSN: 0094-8276
PURE UUID: 405533e0-6d6f-427f-9c82-fd8bfbd94b85
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Date deposited: 11 Nov 2008
Last modified: 15 Mar 2024 11:44
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Author:
Andrew P. Roberts
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