Solar and climate influences on ice core 10 Be records from Antarctica and Greenland during the neutron monitor era
Cosmogenic 10 Be in polar ice cores is a primary proxy for past solar activity. However, interpretation of the 10 Be record is hindered by limited understanding of the physical processes governing its atmospheric transport and deposition to the ice sheets. This issue is addressed by evaluating two a...
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Online Access: | https://doi.org/10.1016/j.epsl.2012.08.038 http://ecite.utas.edu.au/80552 |
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ftunivtasecite:oai:ecite.utas.edu.au:80552 2023-05-15T14:02:30+02:00 Solar and climate influences on ice core 10 Be records from Antarctica and Greenland during the neutron monitor era Pedro, JB McConnell, JR van Ommen, TD Fink, D Curran, MAJ Smith, AM Simon, KJ Moy, AD Das, SB 2012 https://doi.org/10.1016/j.epsl.2012.08.038 http://ecite.utas.edu.au/80552 en eng Elsevier Science Bv http://dx.doi.org/10.1016/j.epsl.2012.08.038 Pedro, JB and McConnell, JR and van Ommen, TD and Fink, D and Curran, MAJ and Smith, AM and Simon, KJ and Moy, AD and Das, SB, Solar and climate influences on ice core 10 Be records from Antarctica and Greenland during the neutron monitor era, Earth and Planetary Science Letters, 355 pp. 174-186. ISSN 0012-821X (2012) [Refereed Article] http://ecite.utas.edu.au/80552 Earth Sciences Physical Geography and Environmental Geoscience Glaciology Refereed Article PeerReviewed 2012 ftunivtasecite https://doi.org/10.1016/j.epsl.2012.08.038 2019-12-13T21:45:47Z Cosmogenic 10 Be in polar ice cores is a primary proxy for past solar activity. However, interpretation of the 10 Be record is hindered by limited understanding of the physical processes governing its atmospheric transport and deposition to the ice sheets. This issue is addressed by evaluating two accurately dated, annually resolved ice core 10 Be records against modern solar activity observations and instrumental and reanalysis climate data. The cores are sampled from the DSS site on Law Dome, East Antarctica (spanning 1936-2009) and the Das2 site, southeast Greenland (1936-2002), permitting inter-hemispheric comparisons. Concentrations at both DSS and Das2 are significantly correlated to the 11-yr solar cycle modulation of cosmic ray intensity, r xy = 0.54 with 95% CI [0.31; 0.70], and r xy = 0.45 with 95% CI [0.22; 0.62], respectively. For both sites, if fluxes are used instead of concentrations then correlations with solar activity decrease. The strength and spectral coherence of the solar activity signal in 10 Be is enhanced when ice core records are combined from both Antarctica and Greenland. The amplitudes of the 11-yr solar cycles in the 10 Be data appear inconsistent with the view that the ice sheets receive only 10 Be produced at polar latitudes. Significant climate signals detected in the 10 Be series include the zonal wave three pattern of atmospheric circulation at DSS, r xy = -0.36 with 95% CI [-0.57; -0.10], and the North Atlantic Oscillation at Das2, r xy = -0.42 with 95% CI [-0.64; -0.15]. The sensitivity of 10Be concentrations to modes of atmospheric circulation advises caution in the use of 10 Be records from single sites in solar forcing reconstructions. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Greenland ice core North Atlantic North Atlantic oscillation eCite UTAS (University of Tasmania) East Antarctica Greenland Law Dome ENVELOPE(112.833,112.833,-66.733,-66.733) Earth and Planetary Science Letters 355-356 174 186 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology Pedro, JB McConnell, JR van Ommen, TD Fink, D Curran, MAJ Smith, AM Simon, KJ Moy, AD Das, SB Solar and climate influences on ice core 10 Be records from Antarctica and Greenland during the neutron monitor era |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
description |
Cosmogenic 10 Be in polar ice cores is a primary proxy for past solar activity. However, interpretation of the 10 Be record is hindered by limited understanding of the physical processes governing its atmospheric transport and deposition to the ice sheets. This issue is addressed by evaluating two accurately dated, annually resolved ice core 10 Be records against modern solar activity observations and instrumental and reanalysis climate data. The cores are sampled from the DSS site on Law Dome, East Antarctica (spanning 1936-2009) and the Das2 site, southeast Greenland (1936-2002), permitting inter-hemispheric comparisons. Concentrations at both DSS and Das2 are significantly correlated to the 11-yr solar cycle modulation of cosmic ray intensity, r xy = 0.54 with 95% CI [0.31; 0.70], and r xy = 0.45 with 95% CI [0.22; 0.62], respectively. For both sites, if fluxes are used instead of concentrations then correlations with solar activity decrease. The strength and spectral coherence of the solar activity signal in 10 Be is enhanced when ice core records are combined from both Antarctica and Greenland. The amplitudes of the 11-yr solar cycles in the 10 Be data appear inconsistent with the view that the ice sheets receive only 10 Be produced at polar latitudes. Significant climate signals detected in the 10 Be series include the zonal wave three pattern of atmospheric circulation at DSS, r xy = -0.36 with 95% CI [-0.57; -0.10], and the North Atlantic Oscillation at Das2, r xy = -0.42 with 95% CI [-0.64; -0.15]. The sensitivity of 10Be concentrations to modes of atmospheric circulation advises caution in the use of 10 Be records from single sites in solar forcing reconstructions. |
format |
Article in Journal/Newspaper |
author |
Pedro, JB McConnell, JR van Ommen, TD Fink, D Curran, MAJ Smith, AM Simon, KJ Moy, AD Das, SB |
author_facet |
Pedro, JB McConnell, JR van Ommen, TD Fink, D Curran, MAJ Smith, AM Simon, KJ Moy, AD Das, SB |
author_sort |
Pedro, JB |
title |
Solar and climate influences on ice core 10 Be records from Antarctica and Greenland during the neutron monitor era |
title_short |
Solar and climate influences on ice core 10 Be records from Antarctica and Greenland during the neutron monitor era |
title_full |
Solar and climate influences on ice core 10 Be records from Antarctica and Greenland during the neutron monitor era |
title_fullStr |
Solar and climate influences on ice core 10 Be records from Antarctica and Greenland during the neutron monitor era |
title_full_unstemmed |
Solar and climate influences on ice core 10 Be records from Antarctica and Greenland during the neutron monitor era |
title_sort |
solar and climate influences on ice core 10 be records from antarctica and greenland during the neutron monitor era |
publisher |
Elsevier Science Bv |
publishDate |
2012 |
url |
https://doi.org/10.1016/j.epsl.2012.08.038 http://ecite.utas.edu.au/80552 |
long_lat |
ENVELOPE(112.833,112.833,-66.733,-66.733) |
geographic |
East Antarctica Greenland Law Dome |
geographic_facet |
East Antarctica Greenland Law Dome |
genre |
Antarc* Antarctica East Antarctica Greenland ice core North Atlantic North Atlantic oscillation |
genre_facet |
Antarc* Antarctica East Antarctica Greenland ice core North Atlantic North Atlantic oscillation |
op_relation |
http://dx.doi.org/10.1016/j.epsl.2012.08.038 Pedro, JB and McConnell, JR and van Ommen, TD and Fink, D and Curran, MAJ and Smith, AM and Simon, KJ and Moy, AD and Das, SB, Solar and climate influences on ice core 10 Be records from Antarctica and Greenland during the neutron monitor era, Earth and Planetary Science Letters, 355 pp. 174-186. ISSN 0012-821X (2012) [Refereed Article] http://ecite.utas.edu.au/80552 |
op_doi |
https://doi.org/10.1016/j.epsl.2012.08.038 |
container_title |
Earth and Planetary Science Letters |
container_volume |
355-356 |
container_start_page |
174 |
op_container_end_page |
186 |
_version_ |
1766272808903507968 |