Rapid regional perturbations to the recent global geomagnetic decay revealed by a new Hawaiian record

L. V. de Groot (), A. J. Biggin, M. J. Dekkers, C. G. Langereis and E. Herrero-Bervera
Additional contact information
L. V. de Groot: Paleomagnetic laboratory Fort Hoofddijk, Utrecht University
A. J. Biggin: Geomagnetism Laboratory, Oliver Lodge Labs, School of Environmental Sciences, University of Liverpool
M. J. Dekkers: Paleomagnetic laboratory Fort Hoofddijk, Utrecht University
C. G. Langereis: Paleomagnetic laboratory Fort Hoofddijk, Utrecht University
E. Herrero-Bervera: Hawaii Institute of Geophysics and Planetology, University of Hawaii at Manoa

Nature Communications, 2013, vol. 4, issue 1, 1-7

Abstract: Abstract The dominant dipolar component of the Earth’s magnetic field has been steadily weakening for at least the last 170 years. Prior to these direct measurements, archaeomagnetic records show short periods of significantly elevated geomagnetic intensity. These striking phenomena are not captured by current field models and their relationship to the recent dipole decay is highly unclear. Here we apply a novel multi-method archaeomagnetic approach to produce a new high-quality record of geomagnetic intensity variations for Hawaii, a crucial locality in the central Pacific. It reveals a short period of high intensity occurring ~1,000 years ago, qualitatively similar to behaviour observed 200 years earlier in Europe and 500 years later in Mesoamerica. We combine these records with one from Japan to produce a coherent picture that includes the dipole decaying steadily over the last millennium. Strong, regional, short-term intensity perturbations are superimposed on this global trend; their asynchronicity necessitates a highly non-dipolar nature.

Date: 2013
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/ncomms3727 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3727

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/ncomms3727

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().