Solar and climate signals revealed by seasonal 10Be data from the NEEM ice core project for the neutron monitor period
10Be in ice cores has been instrumental for reconstructing past changes in solar activity prior to direct observations. For a robust use of these records, it is pivotal to understand the 10Be transport and deposition. However, there are only few high-resolution seasonal 10Be data longer than one ful...
Published in: | Earth and Planetary Science Letters |
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Online Access: | https://lup.lub.lu.se/record/1c4cf35b-ca45-4c92-a9d3-22640b4d2fe0 https://doi.org/10.1016/j.epsl.2020.116273 |
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ftulundlup:oai:lup.lub.lu.se:1c4cf35b-ca45-4c92-a9d3-22640b4d2fe0 2023-05-15T16:26:54+02:00 Solar and climate signals revealed by seasonal 10Be data from the NEEM ice core project for the neutron monitor period Zheng, Minjie Adolphi, Florian Sjolte, Jesper Aldahan, Ala Possnert, Göran Wu, Mousong Chen, Peng Muscheler, Raimund 2020 https://lup.lub.lu.se/record/1c4cf35b-ca45-4c92-a9d3-22640b4d2fe0 https://doi.org/10.1016/j.epsl.2020.116273 eng eng Elsevier https://lup.lub.lu.se/record/1c4cf35b-ca45-4c92-a9d3-22640b4d2fe0 http://dx.doi.org/10.1016/j.epsl.2020.116273 scopus:85084186941 Earth and Planetary Science Letters; 541, no 116273 (2020) ISSN: 0012-821X Climate Research Geosciences Multidisciplinary climate and solar signal cosmogenic radionuclides NEEM firn core seasonally resolved Be contributiontojournal/article info:eu-repo/semantics/article text 2020 ftulundlup https://doi.org/10.1016/j.epsl.2020.116273 2023-02-01T23:40:02Z 10Be in ice cores has been instrumental for reconstructing past changes in solar activity prior to direct observations. For a robust use of these records, it is pivotal to understand the 10Be transport and deposition. However, there are only few high-resolution seasonal 10Be data longer than one full solar cycle (11 years) that could enable a quantification of the influences of atmospheric circulation and deposition processes on the 10Be signal in ice. Here we present a seasonally resolved 10Be data set covering the neutron monitor period (1951–2002) from a firn core connected to the NEEM (North Greenland Eemian Ice Drilling) project. The results suggest that both summer and winter 10Be reflect the production signal induced by solar modulation of galactic cosmic rays. However, superimposed on this solar signal we find additional meteorologically driven influences on 10Be transport and deposition. We found that the tropopause pressure over 30°N represents an important factor influencing NEEM 10Be concentrations on seasonal and annual scales. 10Be deposited in summer also correlates significantly with the tropopause pressure over Greenland suggesting a direct contribution of stratospheric intrusions during summer to the 10Be deposition in Greenland. To correct for these transport/deposition influences, we apply a first-order correction to the 10Be data using a multi-linear regression model. The “climate-corrected” 10Be data shows a comparable skill for reconstructing production rate changes as the 10Be composite record from five different ice cores in Greenland. The results suggest that the correction approach can be a complementary method to the stacking to better isolate the production rate signal from the 10Be data when only limited data are available. Article in Journal/Newspaper Greenland ice core North Greenland Lund University Publications (LUP) Greenland Earth and Planetary Science Letters 541 116273 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Climate Research Geosciences Multidisciplinary climate and solar signal cosmogenic radionuclides NEEM firn core seasonally resolved Be |
spellingShingle |
Climate Research Geosciences Multidisciplinary climate and solar signal cosmogenic radionuclides NEEM firn core seasonally resolved Be Zheng, Minjie Adolphi, Florian Sjolte, Jesper Aldahan, Ala Possnert, Göran Wu, Mousong Chen, Peng Muscheler, Raimund Solar and climate signals revealed by seasonal 10Be data from the NEEM ice core project for the neutron monitor period |
topic_facet |
Climate Research Geosciences Multidisciplinary climate and solar signal cosmogenic radionuclides NEEM firn core seasonally resolved Be |
description |
10Be in ice cores has been instrumental for reconstructing past changes in solar activity prior to direct observations. For a robust use of these records, it is pivotal to understand the 10Be transport and deposition. However, there are only few high-resolution seasonal 10Be data longer than one full solar cycle (11 years) that could enable a quantification of the influences of atmospheric circulation and deposition processes on the 10Be signal in ice. Here we present a seasonally resolved 10Be data set covering the neutron monitor period (1951–2002) from a firn core connected to the NEEM (North Greenland Eemian Ice Drilling) project. The results suggest that both summer and winter 10Be reflect the production signal induced by solar modulation of galactic cosmic rays. However, superimposed on this solar signal we find additional meteorologically driven influences on 10Be transport and deposition. We found that the tropopause pressure over 30°N represents an important factor influencing NEEM 10Be concentrations on seasonal and annual scales. 10Be deposited in summer also correlates significantly with the tropopause pressure over Greenland suggesting a direct contribution of stratospheric intrusions during summer to the 10Be deposition in Greenland. To correct for these transport/deposition influences, we apply a first-order correction to the 10Be data using a multi-linear regression model. The “climate-corrected” 10Be data shows a comparable skill for reconstructing production rate changes as the 10Be composite record from five different ice cores in Greenland. The results suggest that the correction approach can be a complementary method to the stacking to better isolate the production rate signal from the 10Be data when only limited data are available. |
format |
Article in Journal/Newspaper |
author |
Zheng, Minjie Adolphi, Florian Sjolte, Jesper Aldahan, Ala Possnert, Göran Wu, Mousong Chen, Peng Muscheler, Raimund |
author_facet |
Zheng, Minjie Adolphi, Florian Sjolte, Jesper Aldahan, Ala Possnert, Göran Wu, Mousong Chen, Peng Muscheler, Raimund |
author_sort |
Zheng, Minjie |
title |
Solar and climate signals revealed by seasonal 10Be data from the NEEM ice core project for the neutron monitor period |
title_short |
Solar and climate signals revealed by seasonal 10Be data from the NEEM ice core project for the neutron monitor period |
title_full |
Solar and climate signals revealed by seasonal 10Be data from the NEEM ice core project for the neutron monitor period |
title_fullStr |
Solar and climate signals revealed by seasonal 10Be data from the NEEM ice core project for the neutron monitor period |
title_full_unstemmed |
Solar and climate signals revealed by seasonal 10Be data from the NEEM ice core project for the neutron monitor period |
title_sort |
solar and climate signals revealed by seasonal 10be data from the neem ice core project for the neutron monitor period |
publisher |
Elsevier |
publishDate |
2020 |
url |
https://lup.lub.lu.se/record/1c4cf35b-ca45-4c92-a9d3-22640b4d2fe0 https://doi.org/10.1016/j.epsl.2020.116273 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland ice core North Greenland |
genre_facet |
Greenland ice core North Greenland |
op_source |
Earth and Planetary Science Letters; 541, no 116273 (2020) ISSN: 0012-821X |
op_relation |
https://lup.lub.lu.se/record/1c4cf35b-ca45-4c92-a9d3-22640b4d2fe0 http://dx.doi.org/10.1016/j.epsl.2020.116273 scopus:85084186941 |
op_doi |
https://doi.org/10.1016/j.epsl.2020.116273 |
container_title |
Earth and Planetary Science Letters |
container_volume |
541 |
container_start_page |
116273 |
_version_ |
1766015913841131520 |