Effects of global geomagnetic field variations over the past 100,000 years on cosmogenic radionuclide production rates in the Earth’s atmosphere
The production rates of cosmogenic radionuclides, such as 10Be, 14C, and 36Cl, in the Earth’s atmosphere vary with the geomagnetic field and solar activity. For the first time, the production rates of several cosmogenic nuclides are estimated for the past 100 ka based on global, time-dependent geoma...
Published in: | Journal of Geophysical Research: Space Physics |
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ftgfzpotsdam:oai:gfzpublic.gfz-potsdam.de:item_5022294 2023-09-05T13:19:54+02:00 Effects of global geomagnetic field variations over the past 100,000 years on cosmogenic radionuclide production rates in the Earth’s atmosphere Panovska, S. Poluianov, S. Gao, J. Korte, M. Mishev, A. SHPRITS, Y. Usoskin, I. 2023 application/pdf https://gfzpublic.gfz-potsdam.de/pubman/item/item_5022294 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5022294_2/component/file_5022430/5022294.pdf unknown info:eu-repo/semantics/altIdentifier/doi/10.1029/2022JA031158 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5022294 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5022294_2/component/file_5022430/5022294.pdf info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ Journal of Geophysical Research: Space Physics info:eu-repo/semantics/article 2023 ftgfzpotsdam https://doi.org/10.1029/2022JA031158 2023-08-13T23:41:24Z The production rates of cosmogenic radionuclides, such as 10Be, 14C, and 36Cl, in the Earth’s atmosphere vary with the geomagnetic field and solar activity. For the first time, the production rates of several cosmogenic nuclides are estimated for the past 100 ka based on global, time-dependent geomagnetic field models and a moderate solar-activity level. In particular, the production rates were high with no notable latitudinal dependence during the Laschamps geomagnetic excursion (41 ka BP). The mean global production of 10Be over the Laschamps excursion was more than two times greater than the present-day one, whereas the increase was 1.9 times for the Norwegian-Greenland Sea excursion ( ∼65 ka), and only 1.3 times for the Mono Lake/Auckland excursion ( ∼34 ka). All analyzed geomagnetic field models covering the past 100 ka, including the modern and Holocene epochs, lead to hemispheric asymmetry in the production rates, persistent over all time ranges, and reflected in the time-averaged nuclide production rates. Production rates predicted by the geomagnetic field models are in good agreement with actual measurements from ice cores and sediment records. These global, long-term production rates are important for a wide range of studies that employ cosmogenic nuclides as a proxy/tracer of different Earth system processes. Article in Journal/Newspaper Greenland Greenland Sea GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) Greenland Journal of Geophysical Research: Space Physics 128 8 |
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Open Polar |
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GFZpublic (German Research Centre for Geosciences, Helmholtz-Zentrum Potsdam) |
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ftgfzpotsdam |
language |
unknown |
description |
The production rates of cosmogenic radionuclides, such as 10Be, 14C, and 36Cl, in the Earth’s atmosphere vary with the geomagnetic field and solar activity. For the first time, the production rates of several cosmogenic nuclides are estimated for the past 100 ka based on global, time-dependent geomagnetic field models and a moderate solar-activity level. In particular, the production rates were high with no notable latitudinal dependence during the Laschamps geomagnetic excursion (41 ka BP). The mean global production of 10Be over the Laschamps excursion was more than two times greater than the present-day one, whereas the increase was 1.9 times for the Norwegian-Greenland Sea excursion ( ∼65 ka), and only 1.3 times for the Mono Lake/Auckland excursion ( ∼34 ka). All analyzed geomagnetic field models covering the past 100 ka, including the modern and Holocene epochs, lead to hemispheric asymmetry in the production rates, persistent over all time ranges, and reflected in the time-averaged nuclide production rates. Production rates predicted by the geomagnetic field models are in good agreement with actual measurements from ice cores and sediment records. These global, long-term production rates are important for a wide range of studies that employ cosmogenic nuclides as a proxy/tracer of different Earth system processes. |
format |
Article in Journal/Newspaper |
author |
Panovska, S. Poluianov, S. Gao, J. Korte, M. Mishev, A. SHPRITS, Y. Usoskin, I. |
spellingShingle |
Panovska, S. Poluianov, S. Gao, J. Korte, M. Mishev, A. SHPRITS, Y. Usoskin, I. Effects of global geomagnetic field variations over the past 100,000 years on cosmogenic radionuclide production rates in the Earth’s atmosphere |
author_facet |
Panovska, S. Poluianov, S. Gao, J. Korte, M. Mishev, A. SHPRITS, Y. Usoskin, I. |
author_sort |
Panovska, S. |
title |
Effects of global geomagnetic field variations over the past 100,000 years on cosmogenic radionuclide production rates in the Earth’s atmosphere |
title_short |
Effects of global geomagnetic field variations over the past 100,000 years on cosmogenic radionuclide production rates in the Earth’s atmosphere |
title_full |
Effects of global geomagnetic field variations over the past 100,000 years on cosmogenic radionuclide production rates in the Earth’s atmosphere |
title_fullStr |
Effects of global geomagnetic field variations over the past 100,000 years on cosmogenic radionuclide production rates in the Earth’s atmosphere |
title_full_unstemmed |
Effects of global geomagnetic field variations over the past 100,000 years on cosmogenic radionuclide production rates in the Earth’s atmosphere |
title_sort |
effects of global geomagnetic field variations over the past 100,000 years on cosmogenic radionuclide production rates in the earth’s atmosphere |
publishDate |
2023 |
url |
https://gfzpublic.gfz-potsdam.de/pubman/item/item_5022294 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5022294_2/component/file_5022430/5022294.pdf |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland Sea |
genre_facet |
Greenland Greenland Sea |
op_source |
Journal of Geophysical Research: Space Physics |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2022JA031158 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5022294 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5022294_2/component/file_5022430/5022294.pdf |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1029/2022JA031158 |
container_title |
Journal of Geophysical Research: Space Physics |
container_volume |
128 |
container_issue |
8 |
_version_ |
1776200683465211904 |