A deglacial palaeomagnetic master curve for Fennoscandia Providing a dating template and supporting millennial-scale geomagnetic field patterns for the past 14 ka
Reconstructions of palaeomagnetic secular variation (PSV) in sediment cores can be compared to well-dated regional PSV master curves to infer deposition age. The existing PSV master curve for Fennoscandia, "Fennostack" (Snowball et al., 2007), is limited to the past 10 ka. In this study, w...
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ftulundlup:oai:lup.lub.lu.se:55f173c0-daf1-4613-8234-12e718703cc6 2023-05-15T16:11:35+02:00 A deglacial palaeomagnetic master curve for Fennoscandia Providing a dating template and supporting millennial-scale geomagnetic field patterns for the past 14 ka Lougheed, Bryan Nilsson, Andreas Björck, Svante Snowball, Ian Muscheler, Raimund 2014 https://lup.lub.lu.se/record/5070072 https://doi.org/10.1016/j.quascirev.2014.03.008 eng eng Elsevier https://lup.lub.lu.se/record/5070072 http://dx.doi.org/10.1016/j.quascirev.2014.03.008 wos:000348010900011 scopus:85027957989 Quaternary Science Reviews; 106, pp 155-166 (2014) ISSN: 0277-3791 Geology Palaeomagnetic secular variation PSV Geomagnetic field Dipole tilt Cyclicity Deglacial Fennoscandia Baltic Sea Northern Europe Master curve contributiontojournal/article info:eu-repo/semantics/article text 2014 ftulundlup https://doi.org/10.1016/j.quascirev.2014.03.008 2023-02-01T23:29:20Z Reconstructions of palaeomagnetic secular variation (PSV) in sediment cores can be compared to well-dated regional PSV master curves to infer deposition age. The existing PSV master curve for Fennoscandia, "Fennostack" (Snowball et al., 2007), is limited to the past 10 ka. In this study, we construct a deglacial (for the interval 14-11 ka) PSV master curve for Fennoscandia by including data from a number of existing studies in the region, updating geochronologies where necessary. We also produce new deglacial PSV data from Baltic Sea long-core sediments. By selecting three suitable sites, one in southern Sweden and two in northwest Russia, we produce, for the first time, a deglacial PSV master curve for Fennoscandia, which will provide a useful alternative dating tool for deglacial time intervals, especially considering that deglacial sediments are often unsuitable for C-14 dating. Additionally, we use the deglacial PSV master curve to assess current hypotheses regarding geomagnetic field changes. Time varying geomagnetic field models constrained by Holocene PSV data from around the globe have predicted the presence of latitudinal and longitudinal patterns in the position of the north geomagnetic pole (NGP). Specifically, a 1350 year cycle in NGP latitude has been noted, along with two preferred dominant mode longitudinal bands for NGP; in Europe and North America (Korte et al., 2011; Nilsson et al., 2011). Most PSV studies of sediment are, however, limited to the Holocene epoch. By combining our deglacial PSV master curve with 'Fennostack', we are able to assess general patterns in inclination for the past 14 ka, and compare these to a general prediction of regional inclination for the last 14 ka, based on an extrapolation of the latitudinal and longitudinal NGP periodicity noted by Nilsson et al. (2011). The model prediction suggests that the Fennoscandian PSV for the past 14 ka should reveal three recurring intervals of generally steeper inclination due to a dominant NGP longitudinal band in Europe. We find ... Article in Journal/Newspaper Fennoscandia Fennoscandian Geomagnetic Pole Northwest Russia Lund University Publications (LUP) Quaternary Science Reviews 106 155 166 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Geology Palaeomagnetic secular variation PSV Geomagnetic field Dipole tilt Cyclicity Deglacial Fennoscandia Baltic Sea Northern Europe Master curve |
spellingShingle |
Geology Palaeomagnetic secular variation PSV Geomagnetic field Dipole tilt Cyclicity Deglacial Fennoscandia Baltic Sea Northern Europe Master curve Lougheed, Bryan Nilsson, Andreas Björck, Svante Snowball, Ian Muscheler, Raimund A deglacial palaeomagnetic master curve for Fennoscandia Providing a dating template and supporting millennial-scale geomagnetic field patterns for the past 14 ka |
topic_facet |
Geology Palaeomagnetic secular variation PSV Geomagnetic field Dipole tilt Cyclicity Deglacial Fennoscandia Baltic Sea Northern Europe Master curve |
description |
Reconstructions of palaeomagnetic secular variation (PSV) in sediment cores can be compared to well-dated regional PSV master curves to infer deposition age. The existing PSV master curve for Fennoscandia, "Fennostack" (Snowball et al., 2007), is limited to the past 10 ka. In this study, we construct a deglacial (for the interval 14-11 ka) PSV master curve for Fennoscandia by including data from a number of existing studies in the region, updating geochronologies where necessary. We also produce new deglacial PSV data from Baltic Sea long-core sediments. By selecting three suitable sites, one in southern Sweden and two in northwest Russia, we produce, for the first time, a deglacial PSV master curve for Fennoscandia, which will provide a useful alternative dating tool for deglacial time intervals, especially considering that deglacial sediments are often unsuitable for C-14 dating. Additionally, we use the deglacial PSV master curve to assess current hypotheses regarding geomagnetic field changes. Time varying geomagnetic field models constrained by Holocene PSV data from around the globe have predicted the presence of latitudinal and longitudinal patterns in the position of the north geomagnetic pole (NGP). Specifically, a 1350 year cycle in NGP latitude has been noted, along with two preferred dominant mode longitudinal bands for NGP; in Europe and North America (Korte et al., 2011; Nilsson et al., 2011). Most PSV studies of sediment are, however, limited to the Holocene epoch. By combining our deglacial PSV master curve with 'Fennostack', we are able to assess general patterns in inclination for the past 14 ka, and compare these to a general prediction of regional inclination for the last 14 ka, based on an extrapolation of the latitudinal and longitudinal NGP periodicity noted by Nilsson et al. (2011). The model prediction suggests that the Fennoscandian PSV for the past 14 ka should reveal three recurring intervals of generally steeper inclination due to a dominant NGP longitudinal band in Europe. We find ... |
format |
Article in Journal/Newspaper |
author |
Lougheed, Bryan Nilsson, Andreas Björck, Svante Snowball, Ian Muscheler, Raimund |
author_facet |
Lougheed, Bryan Nilsson, Andreas Björck, Svante Snowball, Ian Muscheler, Raimund |
author_sort |
Lougheed, Bryan |
title |
A deglacial palaeomagnetic master curve for Fennoscandia Providing a dating template and supporting millennial-scale geomagnetic field patterns for the past 14 ka |
title_short |
A deglacial palaeomagnetic master curve for Fennoscandia Providing a dating template and supporting millennial-scale geomagnetic field patterns for the past 14 ka |
title_full |
A deglacial palaeomagnetic master curve for Fennoscandia Providing a dating template and supporting millennial-scale geomagnetic field patterns for the past 14 ka |
title_fullStr |
A deglacial palaeomagnetic master curve for Fennoscandia Providing a dating template and supporting millennial-scale geomagnetic field patterns for the past 14 ka |
title_full_unstemmed |
A deglacial palaeomagnetic master curve for Fennoscandia Providing a dating template and supporting millennial-scale geomagnetic field patterns for the past 14 ka |
title_sort |
deglacial palaeomagnetic master curve for fennoscandia providing a dating template and supporting millennial-scale geomagnetic field patterns for the past 14 ka |
publisher |
Elsevier |
publishDate |
2014 |
url |
https://lup.lub.lu.se/record/5070072 https://doi.org/10.1016/j.quascirev.2014.03.008 |
genre |
Fennoscandia Fennoscandian Geomagnetic Pole Northwest Russia |
genre_facet |
Fennoscandia Fennoscandian Geomagnetic Pole Northwest Russia |
op_source |
Quaternary Science Reviews; 106, pp 155-166 (2014) ISSN: 0277-3791 |
op_relation |
https://lup.lub.lu.se/record/5070072 http://dx.doi.org/10.1016/j.quascirev.2014.03.008 wos:000348010900011 scopus:85027957989 |
op_doi |
https://doi.org/10.1016/j.quascirev.2014.03.008 |
container_title |
Quaternary Science Reviews |
container_volume |
106 |
container_start_page |
155 |
op_container_end_page |
166 |
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1765996735798181888 |