Seasonal and subseasonal climate changes recorded in laminated diatom ooze sediments, Adelie Land, East Antarctica
A 40 m long sediment core covering the 1000-9600 years BP period was retrieved from the Dumont d'Urville Trough off Adelie Land, East Antarctica, during the MD 130-Images X-CADO cruise. This sedimentary sequence allows the documentation of changes in climate seasonality during the Holocene. Her...
Published in: | The Holocene |
---|---|
Main Authors: | , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
SAGE Publications
2006
|
Subjects: | |
Online Access: | https://archimer.ifremer.fr/doc/2006/publication-2275.pdf https://doi.org/10.1177/0959683606069414 https://archimer.ifremer.fr/doc/00000/2275/ |
id |
ftarchimer:oai:archimer.ifremer.fr:2275 |
---|---|
record_format |
openpolar |
spelling |
ftarchimer:oai:archimer.ifremer.fr:2275 2023-05-15T13:04:10+02:00 Seasonal and subseasonal climate changes recorded in laminated diatom ooze sediments, Adelie Land, East Antarctica Denis, Delphine Crosta, X Zaragosi, S Romero, O Martin, B Mas, Virginie 2006-12 application/pdf https://archimer.ifremer.fr/doc/2006/publication-2275.pdf https://doi.org/10.1177/0959683606069414 https://archimer.ifremer.fr/doc/00000/2275/ eng eng SAGE Publications https://archimer.ifremer.fr/doc/2006/publication-2275.pdf doi:10.1177/0959683606069414 https://archimer.ifremer.fr/doc/00000/2275/ 2006 Sage info:eu-repo/semantics/openAccess restricted use The Holocene (0959-6836) (SAGE Publications), 2006-12 , Vol. 16 , N. 8 , P. 1137-1147 East Antarctica Sea ice Seasonality Diatom ooze Laminated sediments Holocene Adelie Land text Publication info:eu-repo/semantics/article 2006 ftarchimer https://doi.org/10.1177/0959683606069414 2021-09-23T20:14:33Z A 40 m long sediment core covering the 1000-9600 years BP period was retrieved from the Dumont d'Urville Trough off Adelie Land, East Antarctica, during the MD 130-Images X-CADO cruise. This sedimentary sequence allows the documentation of changes in climate seasonality during the Holocene. Here we show preliminary results of diatom communities, lithic grain distribution and titanium content measured on two 30 cm long sequences of thin sections. The two sequences originate from two different climate regimes, the colder Neoglacial and the warmer Hypsithermal. Proxies were measured at microscale resolution on 25 laminations for the Neoglacial and 14 laminations for the Hypsithermal. The two sequences reveal alternating light-green and dark-green laminae. Light laminae result from low terrigenous input and high sea-ice edge diatom fluxes and are interpreted to represent the spring season. Dark laminae result from high terrigenous input mixed with a diversified open ocean diatom flora and are interpreted to represent the summer-autumn season. The two sequences therefore resolve annual couplets composed of one light plus one dark lamina. Variations in the relative thickness of laminations and annual couplets, associated with diatom assemblage changes, are observed in each sequence and between the two sequences giving information on interannual to millennial changes in environmental conditions. Article in Journal/Newspaper Adelie Land Antarc* Antarctica East Antarctica Sea ice Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Dumont d'Urville ENVELOPE(140.017,140.017,-66.667,-66.667) Dumont d'Urville Trough ENVELOPE(136.000,136.000,-65.500,-65.500) Dumont-d'Urville ENVELOPE(140.013,140.013,-66.667,-66.667) East Antarctica The Holocene 16 8 1137 1147 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
East Antarctica Sea ice Seasonality Diatom ooze Laminated sediments Holocene Adelie Land |
spellingShingle |
East Antarctica Sea ice Seasonality Diatom ooze Laminated sediments Holocene Adelie Land Denis, Delphine Crosta, X Zaragosi, S Romero, O Martin, B Mas, Virginie Seasonal and subseasonal climate changes recorded in laminated diatom ooze sediments, Adelie Land, East Antarctica |
topic_facet |
East Antarctica Sea ice Seasonality Diatom ooze Laminated sediments Holocene Adelie Land |
description |
A 40 m long sediment core covering the 1000-9600 years BP period was retrieved from the Dumont d'Urville Trough off Adelie Land, East Antarctica, during the MD 130-Images X-CADO cruise. This sedimentary sequence allows the documentation of changes in climate seasonality during the Holocene. Here we show preliminary results of diatom communities, lithic grain distribution and titanium content measured on two 30 cm long sequences of thin sections. The two sequences originate from two different climate regimes, the colder Neoglacial and the warmer Hypsithermal. Proxies were measured at microscale resolution on 25 laminations for the Neoglacial and 14 laminations for the Hypsithermal. The two sequences reveal alternating light-green and dark-green laminae. Light laminae result from low terrigenous input and high sea-ice edge diatom fluxes and are interpreted to represent the spring season. Dark laminae result from high terrigenous input mixed with a diversified open ocean diatom flora and are interpreted to represent the summer-autumn season. The two sequences therefore resolve annual couplets composed of one light plus one dark lamina. Variations in the relative thickness of laminations and annual couplets, associated with diatom assemblage changes, are observed in each sequence and between the two sequences giving information on interannual to millennial changes in environmental conditions. |
format |
Article in Journal/Newspaper |
author |
Denis, Delphine Crosta, X Zaragosi, S Romero, O Martin, B Mas, Virginie |
author_facet |
Denis, Delphine Crosta, X Zaragosi, S Romero, O Martin, B Mas, Virginie |
author_sort |
Denis, Delphine |
title |
Seasonal and subseasonal climate changes recorded in laminated diatom ooze sediments, Adelie Land, East Antarctica |
title_short |
Seasonal and subseasonal climate changes recorded in laminated diatom ooze sediments, Adelie Land, East Antarctica |
title_full |
Seasonal and subseasonal climate changes recorded in laminated diatom ooze sediments, Adelie Land, East Antarctica |
title_fullStr |
Seasonal and subseasonal climate changes recorded in laminated diatom ooze sediments, Adelie Land, East Antarctica |
title_full_unstemmed |
Seasonal and subseasonal climate changes recorded in laminated diatom ooze sediments, Adelie Land, East Antarctica |
title_sort |
seasonal and subseasonal climate changes recorded in laminated diatom ooze sediments, adelie land, east antarctica |
publisher |
SAGE Publications |
publishDate |
2006 |
url |
https://archimer.ifremer.fr/doc/2006/publication-2275.pdf https://doi.org/10.1177/0959683606069414 https://archimer.ifremer.fr/doc/00000/2275/ |
long_lat |
ENVELOPE(140.017,140.017,-66.667,-66.667) ENVELOPE(136.000,136.000,-65.500,-65.500) ENVELOPE(140.013,140.013,-66.667,-66.667) |
geographic |
Dumont d'Urville Dumont d'Urville Trough Dumont-d'Urville East Antarctica |
geographic_facet |
Dumont d'Urville Dumont d'Urville Trough Dumont-d'Urville East Antarctica |
genre |
Adelie Land Antarc* Antarctica East Antarctica Sea ice |
genre_facet |
Adelie Land Antarc* Antarctica East Antarctica Sea ice |
op_source |
The Holocene (0959-6836) (SAGE Publications), 2006-12 , Vol. 16 , N. 8 , P. 1137-1147 |
op_relation |
https://archimer.ifremer.fr/doc/2006/publication-2275.pdf doi:10.1177/0959683606069414 https://archimer.ifremer.fr/doc/00000/2275/ |
op_rights |
2006 Sage info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1177/0959683606069414 |
container_title |
The Holocene |
container_volume |
16 |
container_issue |
8 |
container_start_page |
1137 |
op_container_end_page |
1147 |
_version_ |
1766353620353155072 |