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://doi.org/10.5194/bg-13-4205-2016 https://www.biogeosciences.net/13/4205/2016/ |
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ftcopernicus:oai:publications.copernicus.org:bg48498 2023-05-15T13:43:09+02:00 Sedimentary response to sea ice and atmospheric variability over the instrumental period off Adélie Land, East Antarctica Campagne, Philippine Crosta, Xavier Schmidt, Sabine Noëlle Houssais, Marie Ther, Olivier Massé, Guillaume 2018-09-27 info:eu-repo/semantics/application/pdf https://doi.org/10.5194/bg-13-4205-2016 https://www.biogeosciences.net/13/4205/2016/ eng eng info:eu-repo/grantAgreement/EC/FP7/243908 doi:10.5194/bg-13-4205-2016 https://www.biogeosciences.net/13/4205/2016/ info:eu-repo/semantics/openAccess eISSN: 1726-4189 info:eu-repo/semantics/Text 2018 ftcopernicus https://doi.org/10.5194/bg-13-4205-2016 2019-12-24T09:52:07Z 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. Other/Unknown Material Antarc* Antarctic Antarctica East Antarctica Sea ice Southern Ocean Copernicus Publications: E-Journals Antarctic East Antarctica Southern Ocean The Antarctic Biogeosciences 13 14 4205 4218 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
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 |
Other/Unknown Material |
author |
Campagne, Philippine Crosta, Xavier Schmidt, Sabine Noëlle Houssais, Marie Ther, Olivier Massé, Guillaume |
spellingShingle |
Campagne, Philippine Crosta, Xavier Schmidt, Sabine Noëlle Houssais, Marie Ther, Olivier Massé, Guillaume Sedimentary response to sea ice and atmospheric variability over the instrumental period off Adélie Land, East Antarctica |
author_facet |
Campagne, Philippine Crosta, Xavier Schmidt, Sabine Noëlle Houssais, Marie Ther, Olivier Massé, Guillaume |
author_sort |
Campagne, Philippine |
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 |
2018 |
url |
https://doi.org/10.5194/bg-13-4205-2016 https://www.biogeosciences.net/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 |
eISSN: 1726-4189 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/243908 doi:10.5194/bg-13-4205-2016 https://www.biogeosciences.net/13/4205/2016/ |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-13-4205-2016 |
container_title |
Biogeosciences |
container_volume |
13 |
container_issue |
14 |
container_start_page |
4205 |
op_container_end_page |
4218 |
_version_ |
1766185196127780864 |