Sulfate spikes in the deep layers of EPICA-Dome C ice core: Evidence of glaciological artifacts
A detailed ionic component record was performed on EPICA Dome C ice core (East Antarctica) to a depth of 3190 m using Ion Chromatography and Fast Ion Chromatography (FIC). At depths greater than 2800 m, the sulfate profile shows intense, sharp spikes which are not expected due to the smoothing of su...
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ftunivbern:oai:boris.unibe.ch:37515 2023-08-20T04:00:18+02:00 Sulfate spikes in the deep layers of EPICA-Dome C ice core: Evidence of glaciological artifacts Traversi, Rita Becagli, Silvia Castellano, Emiliano Marino, Federica Rugi, Francesco Severi, Mirko de Angelis, Martine Fischer, Hubertus Hansson, Margareta Stauffer, Bernhard Steffensen, Jørgen P. Bigler, Matthias Udisti, Roberto 2009 application/pdf https://boris.unibe.ch/37515/1/es901426y.pdf https://boris.unibe.ch/37515/ eng eng ACS Publications https://boris.unibe.ch/37515/ info:eu-repo/semantics/restrictedAccess Traversi, Rita; Becagli, Silvia; Castellano, Emiliano; Marino, Federica; Rugi, Francesco; Severi, Mirko; de Angelis, Martine; Fischer, Hubertus; Hansson, Margareta; Stauffer, Bernhard; Steffensen, Jørgen P.; Bigler, Matthias; Udisti, Roberto (2009). Sulfate spikes in the deep layers of EPICA-Dome C ice core: Evidence of glaciological artifacts. Environmental science & technology, 43(23), pp. 8737-8743. Washington, D.C.: ACS Publications 10.1021/es901426y <http://dx.doi.org/10.1021/es901426y> 530 Physics info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2009 ftunivbern https://doi.org/10.1021/es901426y 2023-07-31T20:59:40Z A detailed ionic component record was performed on EPICA Dome C ice core (East Antarctica) to a depth of 3190 m using Ion Chromatography and Fast Ion Chromatography (FIC). At depths greater than 2800 m, the sulfate profile shows intense, sharp spikes which are not expected due to the smoothing of sulfate peaks by diffusion processes. Moreover, these spikes show an “anomalous” chemical composition (e.g., unusually low acidity, high Mg2+ concentration and high Mg2+/Ca2+ ratio). These peaks and the surrounding layers also exhibit good Mg2+ vs SO42− and Cl− vs Na+ correlations through both glacial and interglacial periods. Furthermore, the high-resolution analysis of two horizontally contiguous ice sections showed that some fraction of the impurities are characterized by a heterogeneous distribution. Altogether, these results suggest the occurrence of long-term postdepositional processes involving a rearrangement of impurities via migration in the vein network, characterized by sulfuric acidity and leading to the formation of soluble particles of magnesium sulfate salts, along with ionic association of ions in the liquid films along boundaries. This evidence should be taken into consideration when inferring information on for rapid climatic and environmental changes from ice core chemical records at great depths. At Dome C, the depth threshold was found to be 2800 m. Article in Journal/Newspaper Antarc* Antarctica East Antarctica EPICA ice core BORIS (Bern Open Repository and Information System, University of Bern) East Antarctica Environmental Science & Technology 43 23 8737 8743 |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
530 Physics |
spellingShingle |
530 Physics Traversi, Rita Becagli, Silvia Castellano, Emiliano Marino, Federica Rugi, Francesco Severi, Mirko de Angelis, Martine Fischer, Hubertus Hansson, Margareta Stauffer, Bernhard Steffensen, Jørgen P. Bigler, Matthias Udisti, Roberto Sulfate spikes in the deep layers of EPICA-Dome C ice core: Evidence of glaciological artifacts |
topic_facet |
530 Physics |
description |
A detailed ionic component record was performed on EPICA Dome C ice core (East Antarctica) to a depth of 3190 m using Ion Chromatography and Fast Ion Chromatography (FIC). At depths greater than 2800 m, the sulfate profile shows intense, sharp spikes which are not expected due to the smoothing of sulfate peaks by diffusion processes. Moreover, these spikes show an “anomalous” chemical composition (e.g., unusually low acidity, high Mg2+ concentration and high Mg2+/Ca2+ ratio). These peaks and the surrounding layers also exhibit good Mg2+ vs SO42− and Cl− vs Na+ correlations through both glacial and interglacial periods. Furthermore, the high-resolution analysis of two horizontally contiguous ice sections showed that some fraction of the impurities are characterized by a heterogeneous distribution. Altogether, these results suggest the occurrence of long-term postdepositional processes involving a rearrangement of impurities via migration in the vein network, characterized by sulfuric acidity and leading to the formation of soluble particles of magnesium sulfate salts, along with ionic association of ions in the liquid films along boundaries. This evidence should be taken into consideration when inferring information on for rapid climatic and environmental changes from ice core chemical records at great depths. At Dome C, the depth threshold was found to be 2800 m. |
format |
Article in Journal/Newspaper |
author |
Traversi, Rita Becagli, Silvia Castellano, Emiliano Marino, Federica Rugi, Francesco Severi, Mirko de Angelis, Martine Fischer, Hubertus Hansson, Margareta Stauffer, Bernhard Steffensen, Jørgen P. Bigler, Matthias Udisti, Roberto |
author_facet |
Traversi, Rita Becagli, Silvia Castellano, Emiliano Marino, Federica Rugi, Francesco Severi, Mirko de Angelis, Martine Fischer, Hubertus Hansson, Margareta Stauffer, Bernhard Steffensen, Jørgen P. Bigler, Matthias Udisti, Roberto |
author_sort |
Traversi, Rita |
title |
Sulfate spikes in the deep layers of EPICA-Dome C ice core: Evidence of glaciological artifacts |
title_short |
Sulfate spikes in the deep layers of EPICA-Dome C ice core: Evidence of glaciological artifacts |
title_full |
Sulfate spikes in the deep layers of EPICA-Dome C ice core: Evidence of glaciological artifacts |
title_fullStr |
Sulfate spikes in the deep layers of EPICA-Dome C ice core: Evidence of glaciological artifacts |
title_full_unstemmed |
Sulfate spikes in the deep layers of EPICA-Dome C ice core: Evidence of glaciological artifacts |
title_sort |
sulfate spikes in the deep layers of epica-dome c ice core: evidence of glaciological artifacts |
publisher |
ACS Publications |
publishDate |
2009 |
url |
https://boris.unibe.ch/37515/1/es901426y.pdf https://boris.unibe.ch/37515/ |
geographic |
East Antarctica |
geographic_facet |
East Antarctica |
genre |
Antarc* Antarctica East Antarctica EPICA ice core |
genre_facet |
Antarc* Antarctica East Antarctica EPICA ice core |
op_source |
Traversi, Rita; Becagli, Silvia; Castellano, Emiliano; Marino, Federica; Rugi, Francesco; Severi, Mirko; de Angelis, Martine; Fischer, Hubertus; Hansson, Margareta; Stauffer, Bernhard; Steffensen, Jørgen P.; Bigler, Matthias; Udisti, Roberto (2009). Sulfate spikes in the deep layers of EPICA-Dome C ice core: Evidence of glaciological artifacts. Environmental science & technology, 43(23), pp. 8737-8743. Washington, D.C.: ACS Publications 10.1021/es901426y <http://dx.doi.org/10.1021/es901426y> |
op_relation |
https://boris.unibe.ch/37515/ |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1021/es901426y |
container_title |
Environmental Science & Technology |
container_volume |
43 |
container_issue |
23 |
container_start_page |
8737 |
op_container_end_page |
8743 |
_version_ |
1774717461886664704 |