Sedimentary response to sea ice and atmospheric variability over the instrumental period off Adélie Land, East Antarctica
Diatoms account for a large proportion of primary productivity in Antarctic coastal and continental shelf zones. Diatoms, which have been used for a long time to infer past sea surface conditions in the Southern Ocean, have recently been associated with diatom-specific biomarkers (highly branched is...
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Online Access: | https://zenodo.org/record/163323 https://doi.org/10.5194/bg-13-4205-2016 |
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ftzenodo:oai:zenodo.org:163323 2023-05-15T13:59:18+02:00 Sedimentary response to sea ice and atmospheric variability over the instrumental period off Adélie Land, East Antarctica Campagne, P. Crosta, X. Schmidt, S. Noëlle Houssais, M. Ther, O. Massé, G. 2016-07-25 https://zenodo.org/record/163323 https://doi.org/10.5194/bg-13-4205-2016 unknown info:eu-repo/grantAgreement/EC/FP7/243908/ https://zenodo.org/communities/ecfunded https://zenodo.org/record/163323 https://doi.org/10.5194/bg-13-4205-2016 oai:zenodo.org:163323 info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode Biogeosciences 13(14) 4205-4218 info:eu-repo/semantics/article publication-article 2016 ftzenodo https://doi.org/10.5194/bg-13-4205-2016 2023-03-11T00:51:22Z Diatoms account for a large proportion of primary productivity in Antarctic coastal and continental shelf zones. Diatoms, which have been used for a long time to infer past sea surface conditions in the Southern Ocean, have recently been associated with diatom-specific biomarkers (highly branched isoprenoids, HBI). Our study is one of the few sedimentary research projects on diatom ecology and associated biomarkers in the Antarctic seasonal sea ice zone. To date, the Adélie Land region has received little attention, despite evidence for the presence of high accumulation of laminated sediment, allowing for finer climate reconstructions and sedimentary process studies. Here we provide a sequence of seasonally to annually laminated diatomaceous sediment from a 72.5 cm interface core retrieved on the continental shelf off Adélie Land, covering the 1970–2010 CE period. Investigations through statistical analyses of diatom communities, diatom-specific biomarkers and major element abundances document the relationships between these proxies at an unprecedented resolution. Additionally, comparison of sedimentary records to meteorological data monitored by automatic weather station and satellite derived sea ice concentrations help to refine the relationships between our proxies and environmental conditions over the last decades. Our results suggest a coupled interaction of the atmospheric and sea surface variability on sea ice seasonality, which acts as the proximal forcing of siliceous productivity at that scale. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Sea ice Southern Ocean Zenodo Antarctic East Antarctica Southern Ocean The Antarctic Biogeosciences 13 14 4205 4218 |
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Diatoms account for a large proportion of primary productivity in Antarctic coastal and continental shelf zones. Diatoms, which have been used for a long time to infer past sea surface conditions in the Southern Ocean, have recently been associated with diatom-specific biomarkers (highly branched isoprenoids, HBI). Our study is one of the few sedimentary research projects on diatom ecology and associated biomarkers in the Antarctic seasonal sea ice zone. To date, the Adélie Land region has received little attention, despite evidence for the presence of high accumulation of laminated sediment, allowing for finer climate reconstructions and sedimentary process studies. Here we provide a sequence of seasonally to annually laminated diatomaceous sediment from a 72.5 cm interface core retrieved on the continental shelf off Adélie Land, covering the 1970–2010 CE period. Investigations through statistical analyses of diatom communities, diatom-specific biomarkers and major element abundances document the relationships between these proxies at an unprecedented resolution. Additionally, comparison of sedimentary records to meteorological data monitored by automatic weather station and satellite derived sea ice concentrations help to refine the relationships between our proxies and environmental conditions over the last decades. Our results suggest a coupled interaction of the atmospheric and sea surface variability on sea ice seasonality, which acts as the proximal forcing of siliceous productivity at that scale. |
format |
Article in Journal/Newspaper |
author |
Campagne, P. Crosta, X. Schmidt, S. Noëlle Houssais, M. Ther, O. Massé, G. |
spellingShingle |
Campagne, P. Crosta, X. Schmidt, S. Noëlle Houssais, M. Ther, O. Massé, G. Sedimentary response to sea ice and atmospheric variability over the instrumental period off Adélie Land, East Antarctica |
author_facet |
Campagne, P. Crosta, X. Schmidt, S. Noëlle Houssais, M. Ther, O. Massé, G. |
author_sort |
Campagne, P. |
title |
Sedimentary response to sea ice and atmospheric variability over the instrumental period off Adélie Land, East Antarctica |
title_short |
Sedimentary response to sea ice and atmospheric variability over the instrumental period off Adélie Land, East Antarctica |
title_full |
Sedimentary response to sea ice and atmospheric variability over the instrumental period off Adélie Land, East Antarctica |
title_fullStr |
Sedimentary response to sea ice and atmospheric variability over the instrumental period off Adélie Land, East Antarctica |
title_full_unstemmed |
Sedimentary response to sea ice and atmospheric variability over the instrumental period off Adélie Land, East Antarctica |
title_sort |
sedimentary response to sea ice and atmospheric variability over the instrumental period off adélie land, east antarctica |
publishDate |
2016 |
url |
https://zenodo.org/record/163323 https://doi.org/10.5194/bg-13-4205-2016 |
geographic |
Antarctic East Antarctica Southern Ocean The Antarctic |
geographic_facet |
Antarctic East Antarctica Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica East Antarctica Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Sea ice Southern Ocean |
op_source |
Biogeosciences 13(14) 4205-4218 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/243908/ https://zenodo.org/communities/ecfunded https://zenodo.org/record/163323 https://doi.org/10.5194/bg-13-4205-2016 oai:zenodo.org:163323 |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.5194/bg-13-4205-2016 |
container_title |
Biogeosciences |
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13 |
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14 |
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4205 |
op_container_end_page |
4218 |
_version_ |
1766267828344717312 |