Seasonal and subseasonal climate changes recorded in laminated diatom ooze sediments, Adélie 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 Adélie 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...
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Online Access: | http://dx.doi.org/10.1177/0959683606069414 http://journals.sagepub.com/doi/pdf/10.1177/0959683606069414 |
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crsagepubl:10.1177/0959683606069414 2023-05-15T14:10:51+02:00 Seasonal and subseasonal climate changes recorded in laminated diatom ooze sediments, Adélie Land, East Antarctica Denis, D. Crosta, X. Zaragosi, S. Romero, O. Martin, B. Mas, V. 2006 http://dx.doi.org/10.1177/0959683606069414 http://journals.sagepub.com/doi/pdf/10.1177/0959683606069414 en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license The Holocene volume 16, issue 8, page 1137-1147 ISSN 0959-6836 1477-0911 Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change journal-article 2006 crsagepubl https://doi.org/10.1177/0959683606069414 2022-09-28T19:04:44Z A 40 m long sediment core covering the 1000–9600 years BP period was retrieved from the Dumont d'Urville Trough off Adélie 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 Antarc* Antarctica East Antarctica Sea ice SAGE Publications (via Crossref) 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 |
SAGE Publications (via Crossref) |
op_collection_id |
crsagepubl |
language |
English |
topic |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change |
spellingShingle |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change Denis, D. Crosta, X. Zaragosi, S. Romero, O. Martin, B. Mas, V. Seasonal and subseasonal climate changes recorded in laminated diatom ooze sediments, Adélie Land, East Antarctica |
topic_facet |
Paleontology Earth-Surface Processes Ecology Archeology Global and Planetary Change |
description |
A 40 m long sediment core covering the 1000–9600 years BP period was retrieved from the Dumont d'Urville Trough off Adélie 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, D. Crosta, X. Zaragosi, S. Romero, O. Martin, B. Mas, V. |
author_facet |
Denis, D. Crosta, X. Zaragosi, S. Romero, O. Martin, B. Mas, V. |
author_sort |
Denis, D. |
title |
Seasonal and subseasonal climate changes recorded in laminated diatom ooze sediments, Adélie Land, East Antarctica |
title_short |
Seasonal and subseasonal climate changes recorded in laminated diatom ooze sediments, Adélie Land, East Antarctica |
title_full |
Seasonal and subseasonal climate changes recorded in laminated diatom ooze sediments, Adélie Land, East Antarctica |
title_fullStr |
Seasonal and subseasonal climate changes recorded in laminated diatom ooze sediments, Adélie Land, East Antarctica |
title_full_unstemmed |
Seasonal and subseasonal climate changes recorded in laminated diatom ooze sediments, Adélie Land, East Antarctica |
title_sort |
seasonal and subseasonal climate changes recorded in laminated diatom ooze sediments, adélie land, east antarctica |
publisher |
SAGE Publications |
publishDate |
2006 |
url |
http://dx.doi.org/10.1177/0959683606069414 http://journals.sagepub.com/doi/pdf/10.1177/0959683606069414 |
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 |
Antarc* Antarctica East Antarctica Sea ice |
genre_facet |
Antarc* Antarctica East Antarctica Sea ice |
op_source |
The Holocene volume 16, issue 8, page 1137-1147 ISSN 0959-6836 1477-0911 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
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 |
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1766282961280303104 |