The Laschamp geomagnetic excursion featured in nitrate record from EPICA-Dome C ice core
Here we present the first direct comparison of cosmogenic 10Be and chemical species in the period of 38–45.5 kyr BP spanning the Laschamp geomagnetic excursion from the EPICA-Dome C ice core. A principal component analysis (PCA) allowed to group different components as a function of the main sources...
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ftpubmed:oai:pubmedcentral.nih.gov:4730186 2023-05-15T16:06:17+02:00 The Laschamp geomagnetic excursion featured in nitrate record from EPICA-Dome C ice core Traversi, R. Becagli, S. Poluianov, S. Severi, M. Solanki, S. K. Usoskin, I. G. Udisti, R. 2016-01-28 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4730186/ http://www.ncbi.nlm.nih.gov/pubmed/26819064 https://doi.org/10.1038/srep20235 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4730186/ http://www.ncbi.nlm.nih.gov/pubmed/26819064 http://dx.doi.org/10.1038/srep20235 Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2016 ftpubmed https://doi.org/10.1038/srep20235 2016-02-07T01:28:48Z Here we present the first direct comparison of cosmogenic 10Be and chemical species in the period of 38–45.5 kyr BP spanning the Laschamp geomagnetic excursion from the EPICA-Dome C ice core. A principal component analysis (PCA) allowed to group different components as a function of the main sources, transport and deposition processes affecting the atmospheric aerosol at Dome C. Moreover, a wavelet analysis highlighted the high coherence and in-phase relationship between 10Be and nitrate at this time. The evident preferential association of 10Be with nitrate rather than with other chemical species was ascribed to the presence of a distinct source, here labelled as “cosmogenic”. Both the PCA and wavelet analyses ruled out a significant role of calcium in driving the 10Be and nitrate relationship, which is particularly relevant for a plateau site such as Dome C, especially in the glacial period during which the Laschamp excursion took place. The evidence that the nitrate record from the EDC ice core is able to capture the Laschamp event hints toward the possibility of using this marker for studying galactic cosmic ray flux variations and thus also major geomagnetic field excursions at pluri-centennial-millennial time scales, thus opening up new perspectives in paleoclimatic studies. Text EPICA ice core PubMed Central (PMC) Scientific Reports 6 1 |
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Article Traversi, R. Becagli, S. Poluianov, S. Severi, M. Solanki, S. K. Usoskin, I. G. Udisti, R. The Laschamp geomagnetic excursion featured in nitrate record from EPICA-Dome C ice core |
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Here we present the first direct comparison of cosmogenic 10Be and chemical species in the period of 38–45.5 kyr BP spanning the Laschamp geomagnetic excursion from the EPICA-Dome C ice core. A principal component analysis (PCA) allowed to group different components as a function of the main sources, transport and deposition processes affecting the atmospheric aerosol at Dome C. Moreover, a wavelet analysis highlighted the high coherence and in-phase relationship between 10Be and nitrate at this time. The evident preferential association of 10Be with nitrate rather than with other chemical species was ascribed to the presence of a distinct source, here labelled as “cosmogenic”. Both the PCA and wavelet analyses ruled out a significant role of calcium in driving the 10Be and nitrate relationship, which is particularly relevant for a plateau site such as Dome C, especially in the glacial period during which the Laschamp excursion took place. The evidence that the nitrate record from the EDC ice core is able to capture the Laschamp event hints toward the possibility of using this marker for studying galactic cosmic ray flux variations and thus also major geomagnetic field excursions at pluri-centennial-millennial time scales, thus opening up new perspectives in paleoclimatic studies. |
format |
Text |
author |
Traversi, R. Becagli, S. Poluianov, S. Severi, M. Solanki, S. K. Usoskin, I. G. Udisti, R. |
author_facet |
Traversi, R. Becagli, S. Poluianov, S. Severi, M. Solanki, S. K. Usoskin, I. G. Udisti, R. |
author_sort |
Traversi, R. |
title |
The Laschamp geomagnetic excursion featured in nitrate record from EPICA-Dome C ice core |
title_short |
The Laschamp geomagnetic excursion featured in nitrate record from EPICA-Dome C ice core |
title_full |
The Laschamp geomagnetic excursion featured in nitrate record from EPICA-Dome C ice core |
title_fullStr |
The Laschamp geomagnetic excursion featured in nitrate record from EPICA-Dome C ice core |
title_full_unstemmed |
The Laschamp geomagnetic excursion featured in nitrate record from EPICA-Dome C ice core |
title_sort |
laschamp geomagnetic excursion featured in nitrate record from epica-dome c ice core |
publisher |
Nature Publishing Group |
publishDate |
2016 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4730186/ http://www.ncbi.nlm.nih.gov/pubmed/26819064 https://doi.org/10.1038/srep20235 |
genre |
EPICA ice core |
genre_facet |
EPICA ice core |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4730186/ http://www.ncbi.nlm.nih.gov/pubmed/26819064 http://dx.doi.org/10.1038/srep20235 |
op_rights |
Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
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CC-BY |
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https://doi.org/10.1038/srep20235 |
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Scientific Reports |
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