Geomagnetic dipole moment variations for the last glacial period inferred from cosmogenic radionuclides in Greenland ice cores via disentangling the climate and production signals
The geomagnetic dipole moment (GDM) modulates the production rates of cosmogenic radionuclides via the shielding of galactic cosmic rays. Therefore, it is possible to use this linkage to reconstruct past changes in the GDM based on cosmogenic radionuclide records from natural archives such as ice co...
Published in: | Quaternary Science Reviews |
---|---|
Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2021
|
Subjects: | |
Online Access: | https://epic.awi.de/id/eprint/55802/ https://www.sciencedirect.com/science/article/pii/S0277379121000883 https://hdl.handle.net/10013/epic.1f4240ab-555d-423b-833d-41365b1c08f0 |
id |
ftawi:oai:epic.awi.de:55802 |
---|---|
record_format |
openpolar |
spelling |
ftawi:oai:epic.awi.de:55802 2024-09-15T18:09:31+00:00 Geomagnetic dipole moment variations for the last glacial period inferred from cosmogenic radionuclides in Greenland ice cores via disentangling the climate and production signals Zheng, Minjie Sturevik-Storm, Anna Nilsson, Andreas Adolphi, Florian Aldahan, Ala Possnert, Göran Muscheler, Raimund 2021 https://epic.awi.de/id/eprint/55802/ https://www.sciencedirect.com/science/article/pii/S0277379121000883 https://hdl.handle.net/10013/epic.1f4240ab-555d-423b-833d-41365b1c08f0 unknown Zheng, M. , Sturevik-Storm, A. , Nilsson, A. , Adolphi, F. orcid:0000-0003-0014-8753 , Aldahan, A. , Possnert, G. and Muscheler, R. (2021) Geomagnetic dipole moment variations for the last glacial period inferred from cosmogenic radionuclides in Greenland ice cores via disentangling the climate and production signals , Quaternary Science Reviews, 258 , p. 106881 . doi:10.1016/j.quascirev.2021.106881 <https://doi.org/10.1016/j.quascirev.2021.106881> , hdl:10013/epic.1f4240ab-555d-423b-833d-41365b1c08f0 EPIC3Quaternary Science Reviews, 258, pp. 106881 Article isiRev 2021 ftawi https://doi.org/10.1016/j.quascirev.2021.106881 2024-06-24T04:28:46Z The geomagnetic dipole moment (GDM) modulates the production rates of cosmogenic radionuclides via the shielding of galactic cosmic rays. Therefore, it is possible to use this linkage to reconstruct past changes in the GDM based on cosmogenic radionuclide records from natural archives such as ice cores. Here we present a GDM reconstruction based on 10Be and 36Cl data from two Greenland ice cores from 11.7 ka to 108 ka b2k (before A.D. 2000). We find that the cosmogenic radionuclide records reflect a mixture of climate and production effects that require separation to evaluate the changes in the GDM. To minimize climate-related variations on isotope data, we applied a multi-linear correction method by removing common variability between 10Be and 36Cl and climate parameters (accumulation rates, δ18O and ion data) from radionuclide records. The resulting “climate corrected” radionuclide data are converted to GDM using a theoretical production model. Comparison of “climate corrected” radionuclides based GDM reconstructions with independent paleomagnetic-derived GDM records shows a good agreement. Furthermore, the “climate correction” leads to an improved agreement with GDM reconstructions than simply using radionuclide fluxes, lending support to the validity of our correction method to isolate production rate changes from ice core radionuclide records. With this correction method, we can extend the GDM reconstructions based on the cosmogenic radionuclides in ice cores to a period when there is a strong climate signal in the data. Article in Journal/Newspaper Greenland Greenland ice cores ice core Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Quaternary Science Reviews 258 106881 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
The geomagnetic dipole moment (GDM) modulates the production rates of cosmogenic radionuclides via the shielding of galactic cosmic rays. Therefore, it is possible to use this linkage to reconstruct past changes in the GDM based on cosmogenic radionuclide records from natural archives such as ice cores. Here we present a GDM reconstruction based on 10Be and 36Cl data from two Greenland ice cores from 11.7 ka to 108 ka b2k (before A.D. 2000). We find that the cosmogenic radionuclide records reflect a mixture of climate and production effects that require separation to evaluate the changes in the GDM. To minimize climate-related variations on isotope data, we applied a multi-linear correction method by removing common variability between 10Be and 36Cl and climate parameters (accumulation rates, δ18O and ion data) from radionuclide records. The resulting “climate corrected” radionuclide data are converted to GDM using a theoretical production model. Comparison of “climate corrected” radionuclides based GDM reconstructions with independent paleomagnetic-derived GDM records shows a good agreement. Furthermore, the “climate correction” leads to an improved agreement with GDM reconstructions than simply using radionuclide fluxes, lending support to the validity of our correction method to isolate production rate changes from ice core radionuclide records. With this correction method, we can extend the GDM reconstructions based on the cosmogenic radionuclides in ice cores to a period when there is a strong climate signal in the data. |
format |
Article in Journal/Newspaper |
author |
Zheng, Minjie Sturevik-Storm, Anna Nilsson, Andreas Adolphi, Florian Aldahan, Ala Possnert, Göran Muscheler, Raimund |
spellingShingle |
Zheng, Minjie Sturevik-Storm, Anna Nilsson, Andreas Adolphi, Florian Aldahan, Ala Possnert, Göran Muscheler, Raimund Geomagnetic dipole moment variations for the last glacial period inferred from cosmogenic radionuclides in Greenland ice cores via disentangling the climate and production signals |
author_facet |
Zheng, Minjie Sturevik-Storm, Anna Nilsson, Andreas Adolphi, Florian Aldahan, Ala Possnert, Göran Muscheler, Raimund |
author_sort |
Zheng, Minjie |
title |
Geomagnetic dipole moment variations for the last glacial period inferred from cosmogenic radionuclides in Greenland ice cores via disentangling the climate and production signals |
title_short |
Geomagnetic dipole moment variations for the last glacial period inferred from cosmogenic radionuclides in Greenland ice cores via disentangling the climate and production signals |
title_full |
Geomagnetic dipole moment variations for the last glacial period inferred from cosmogenic radionuclides in Greenland ice cores via disentangling the climate and production signals |
title_fullStr |
Geomagnetic dipole moment variations for the last glacial period inferred from cosmogenic radionuclides in Greenland ice cores via disentangling the climate and production signals |
title_full_unstemmed |
Geomagnetic dipole moment variations for the last glacial period inferred from cosmogenic radionuclides in Greenland ice cores via disentangling the climate and production signals |
title_sort |
geomagnetic dipole moment variations for the last glacial period inferred from cosmogenic radionuclides in greenland ice cores via disentangling the climate and production signals |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/55802/ https://www.sciencedirect.com/science/article/pii/S0277379121000883 https://hdl.handle.net/10013/epic.1f4240ab-555d-423b-833d-41365b1c08f0 |
genre |
Greenland Greenland ice cores ice core |
genre_facet |
Greenland Greenland ice cores ice core |
op_source |
EPIC3Quaternary Science Reviews, 258, pp. 106881 |
op_relation |
Zheng, M. , Sturevik-Storm, A. , Nilsson, A. , Adolphi, F. orcid:0000-0003-0014-8753 , Aldahan, A. , Possnert, G. and Muscheler, R. (2021) Geomagnetic dipole moment variations for the last glacial period inferred from cosmogenic radionuclides in Greenland ice cores via disentangling the climate and production signals , Quaternary Science Reviews, 258 , p. 106881 . doi:10.1016/j.quascirev.2021.106881 <https://doi.org/10.1016/j.quascirev.2021.106881> , hdl:10013/epic.1f4240ab-555d-423b-833d-41365b1c08f0 |
op_doi |
https://doi.org/10.1016/j.quascirev.2021.106881 |
container_title |
Quaternary Science Reviews |
container_volume |
258 |
container_start_page |
106881 |
_version_ |
1810447091920535552 |