Southern Ocean sea-ice extent, productivity and iron flux over the past eight glacial cycles
Sea ice and dust flux increased greatly in the Southern Ocean during the last glacial period. Palaeorecords provide contradictory evidence about marine productivity in this region, but beyond one glacial cycle, data were sparse. Here we present continuous chemical proxy data spanning the last eight...
Published in: | Nature |
---|---|
Main Authors: | , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
Nature Publishing Group
2006
|
Subjects: | |
Online Access: | http://nora.nerc.ac.uk/id/eprint/163/ http://www.nature.com/nature/journal/v440/n7083/full/nature04614.html https://doi.org/10.1038/nature04614 |
id |
ftnerc:oai:nora.nerc.ac.uk:163 |
---|---|
record_format |
openpolar |
spelling |
ftnerc:oai:nora.nerc.ac.uk:163 2023-05-15T14:05:15+02:00 Southern Ocean sea-ice extent, productivity and iron flux over the past eight glacial cycles Wolff, E.W. Fischer, H. Fundel, F. Ruth, U. Twarloh, B. Littot, G.C. Mulvaney, R. Rothlisberger, R. Angelis, M. De Boutron, C.F. Hansson, M. Jonsell, U. Hutterli, M.A. 15 others, . 2006 http://nora.nerc.ac.uk/id/eprint/163/ http://www.nature.com/nature/journal/v440/n7083/full/nature04614.html https://doi.org/10.1038/nature04614 unknown Nature Publishing Group Wolff, E.W.; Fischer, H.; Fundel, F.; Ruth, U.; Twarloh, B.; Littot, G.C.; Mulvaney, R. orcid:0000-0002-5372-8148 Rothlisberger, R.; Angelis, M. De; Boutron, C.F.; Hansson, M.; Jonsell, U.; Hutterli, M.A.; 15 others, . 2006 Southern Ocean sea-ice extent, productivity and iron flux over the past eight glacial cycles. Nature, 440 (7083). 491-496. https://doi.org/10.1038/nature04614 <https://doi.org/10.1038/nature04614> Glaciology Publication - Article PeerReviewed 2006 ftnerc https://doi.org/10.1038/nature04614 2023-02-04T19:20:06Z Sea ice and dust flux increased greatly in the Southern Ocean during the last glacial period. Palaeorecords provide contradictory evidence about marine productivity in this region, but beyond one glacial cycle, data were sparse. Here we present continuous chemical proxy data spanning the last eight glacial cycles (740,000 years) from the Dome C Antarctic ice core. These data constrain winter sea-ice extent in the Indian Ocean, Southern Ocean biogenic productivity and Patagonian climatic conditions. We found that maximum sea-ice extent is closely tied to Antarctic temperature on multi-millennial timescales, but less so on shorter timescales. Biological dimethylsulphide emissions south of the polar front seem to have changed little with climate, suggesting that sulphur compounds were not active in climate regulation. We observe large glacial–interglacial contrasts in iron deposition, which we infer reflects strongly changing Patagonian conditions. During glacial terminations, changes in Patagonia apparently preceded sea-ice reduction, indicating that multiple mechanisms may be responsible for different phases of CO2 increase during glacial terminations. We observe no changes in internal climatic feedbacks that could have caused the change in amplitude of Antarctic temperature variations observed 440,000 years ago. Article in Journal/Newspaper Antarc* Antarctic ice core Sea ice Southern Ocean Natural Environment Research Council: NERC Open Research Archive Antarctic Indian Patagonia Southern Ocean Nature 440 7083 491 496 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Glaciology |
spellingShingle |
Glaciology Wolff, E.W. Fischer, H. Fundel, F. Ruth, U. Twarloh, B. Littot, G.C. Mulvaney, R. Rothlisberger, R. Angelis, M. De Boutron, C.F. Hansson, M. Jonsell, U. Hutterli, M.A. 15 others, . Southern Ocean sea-ice extent, productivity and iron flux over the past eight glacial cycles |
topic_facet |
Glaciology |
description |
Sea ice and dust flux increased greatly in the Southern Ocean during the last glacial period. Palaeorecords provide contradictory evidence about marine productivity in this region, but beyond one glacial cycle, data were sparse. Here we present continuous chemical proxy data spanning the last eight glacial cycles (740,000 years) from the Dome C Antarctic ice core. These data constrain winter sea-ice extent in the Indian Ocean, Southern Ocean biogenic productivity and Patagonian climatic conditions. We found that maximum sea-ice extent is closely tied to Antarctic temperature on multi-millennial timescales, but less so on shorter timescales. Biological dimethylsulphide emissions south of the polar front seem to have changed little with climate, suggesting that sulphur compounds were not active in climate regulation. We observe large glacial–interglacial contrasts in iron deposition, which we infer reflects strongly changing Patagonian conditions. During glacial terminations, changes in Patagonia apparently preceded sea-ice reduction, indicating that multiple mechanisms may be responsible for different phases of CO2 increase during glacial terminations. We observe no changes in internal climatic feedbacks that could have caused the change in amplitude of Antarctic temperature variations observed 440,000 years ago. |
format |
Article in Journal/Newspaper |
author |
Wolff, E.W. Fischer, H. Fundel, F. Ruth, U. Twarloh, B. Littot, G.C. Mulvaney, R. Rothlisberger, R. Angelis, M. De Boutron, C.F. Hansson, M. Jonsell, U. Hutterli, M.A. 15 others, . |
author_facet |
Wolff, E.W. Fischer, H. Fundel, F. Ruth, U. Twarloh, B. Littot, G.C. Mulvaney, R. Rothlisberger, R. Angelis, M. De Boutron, C.F. Hansson, M. Jonsell, U. Hutterli, M.A. 15 others, . |
author_sort |
Wolff, E.W. |
title |
Southern Ocean sea-ice extent, productivity and iron flux over the past eight glacial cycles |
title_short |
Southern Ocean sea-ice extent, productivity and iron flux over the past eight glacial cycles |
title_full |
Southern Ocean sea-ice extent, productivity and iron flux over the past eight glacial cycles |
title_fullStr |
Southern Ocean sea-ice extent, productivity and iron flux over the past eight glacial cycles |
title_full_unstemmed |
Southern Ocean sea-ice extent, productivity and iron flux over the past eight glacial cycles |
title_sort |
southern ocean sea-ice extent, productivity and iron flux over the past eight glacial cycles |
publisher |
Nature Publishing Group |
publishDate |
2006 |
url |
http://nora.nerc.ac.uk/id/eprint/163/ http://www.nature.com/nature/journal/v440/n7083/full/nature04614.html https://doi.org/10.1038/nature04614 |
geographic |
Antarctic Indian Patagonia Southern Ocean |
geographic_facet |
Antarctic Indian Patagonia Southern Ocean |
genre |
Antarc* Antarctic ice core Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic ice core Sea ice Southern Ocean |
op_relation |
Wolff, E.W.; Fischer, H.; Fundel, F.; Ruth, U.; Twarloh, B.; Littot, G.C.; Mulvaney, R. orcid:0000-0002-5372-8148 Rothlisberger, R.; Angelis, M. De; Boutron, C.F.; Hansson, M.; Jonsell, U.; Hutterli, M.A.; 15 others, . 2006 Southern Ocean sea-ice extent, productivity and iron flux over the past eight glacial cycles. Nature, 440 (7083). 491-496. https://doi.org/10.1038/nature04614 <https://doi.org/10.1038/nature04614> |
op_doi |
https://doi.org/10.1038/nature04614 |
container_title |
Nature |
container_volume |
440 |
container_issue |
7083 |
container_start_page |
491 |
op_container_end_page |
496 |
_version_ |
1766277013750939648 |