Cited by 248Geomagnetism and Paleomagnetism StudiesGeology and Paleoclimatology ResearchGeological and Geophysical Studies

Reconstructing Holocene geomagnetic field variation: new methods, models and implications.

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Nilsson, Andreas, Holme, Richard, Korte, Monika, Suttie, Neil, Hill, Mimi·2014·Geophysical Journal International

Abstract

Reconstructions of the Holocene geomagnetic field and how it varies on millennial timescales are important for understanding processes in the core but may also be used to study long-term solar-terrestrial relationships and as relative dating tools for geological and archaeological archives. Here, we present a new family of spherical harmonic geomagnetic field models spanning the past 9000 yr based on magnetic field directions and intensity stored in archaeological artefacts, igneous rocks and sediment records. A new modelling strategy introduces alternative data treatments with a focus on extracting more information from sedimentary data. To reduce the influence of a few individual records all sedimentary data are resampled in 50-yr bins, which also means that more weight is given to archaeomagnetic data during the inversion. The sedimentary declination data are treated as relative values and adjusted iteratively based on prior information. Finally, an alternative way of treating the sediment data chronologies has enabled us to both assess the likely range of age uncertainties, often up to and possibly exceeding 500 yr and adjust the timescale of each record based on comparisons with predictions from a preliminary model. As a result of the data adjustments, power has been shifted from quadrupole and octupole to higher degrees compared with previous Holocene geomagnetic field models. We find evidence for dominantly westward drift of northern high latitude high intensity flux patches at the core mantle boundary for the last 4000 yr. The new models also show intermittent occurrence of reversed flux at the edge of or inside the inner core tangent cylinder, possibly originating from the equator.

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Research works printed but not linked: 3

  1. Brown, H., 1981. A palaeomagnetic, geochronological and palaeoenvironmental investigation of late post glacial maar lake sediments from NW Europe, PhD thesis , University of Edinburgh, Edinburgh.
  2. Hogg, E., 1978. The Holocene geomagnetic field in Europe, PhD thesis , University of Edinburgh, Edinburgh, U.K.
  3. King, J.W., 1983. Geomagnetic secular variation curves for northeastern North America for the last 9000 years, PhD thesis , University of Minnesota, Minneapolis.

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Authors
Nilsson, A., Holme, R., Korte, M., Suttie, N., & Hill, M.
Affiliations
  • University of Liverpool (GB)
  • GFZ Helmholtz Centre for Geosciences (DE)
Corresponding author
  • Nilsson, Andreas
  • Holme, Richard
  • Suttie, Neil
  • Hill, Mimi
Venue
Geophysical Journal International
Published
2014-05-15
Volume
198
Issue
1
Pages
229-248
ISSN
  • 0956-540X (ISSN-L)
  • 1365-246X
OpenAlex
W2168784807
Cited by
248
References
120
Citations by year
2026: 5 · 2025: 16 · 2024: 17 · 2023: 5 · 2022: 21 · 2021: 25 · 2020: 29 · 2019: 25 · 2018: 29 · 2017: 28 · 2016: 26 · 2015: 18 · 2014: 4
FWCI
10.37
Type
journal article
Language
en
Open access
Locations
  • Geophysical Journal International (publishedVersion)
  • Publication Database GFZ (GFZ German Research Centre for Geosciences) (submittedVersion)
  • Publication Database GFZ (GFZ German Research Centre for Geosciences) (submittedVersion, other-oa)
  • Lund University Publications (Lund University) (submittedVersion)
  • HighWire Press Open Archive (submittedVersion)
Funders
Natural Environment Research Council (NE/I013873/1, NE/H021043/1)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Geomagnetism and Paleomagnetism Studies
  • Physical Sciences › Earth and Planetary Sciences › Atmospheric Science › Geology and Paleoclimatology Research
  • Physical Sciences › Earth and Planetary Sciences › Geology › Geological and Geophysical Studies
Keywords
Holocene geomagnetic field, geomagnetic field reconstruction, spherical harmonic model, archaeomagnetic dating, geomagnetic field intensity, magnetic declination, westward drift, solar-terrestrial relations, age uncertainty

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