Productivity and dissolved oxygen controls on the Southern Ocean deep‐sea benthos during the Antarctic Cold Reversal
The Antarctic Cold Reversal (ACR; 14.7 to 13 thousand years ago; ka) phase of the last deglaciation saw a pause in the rise of atmospheric CO 2 and Antarctic temperature, that contrasted with warming in the North. A re-expansion of sea ice and a northward shift in the position of the westerly winds...
Published in: | Paleoceanography and Paleoclimatology |
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Main Authors: | , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2021
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Online Access: | https://risweb.st-andrews.ac.uk/portal/en/researchoutput/productivity-and-dissolved-oxygen-controls-on-the-southern-ocean-deepsea-benthos-during-the-antarctic-cold-reversal(efd1f50e-9e8c-47a3-bbfc-2eea5b794cc1).html https://doi.org/10.1029/2021pa004288 https://research-repository.st-andrews.ac.uk/bitstream/10023/24176/1/Stewart_2021_PP_Productivity_dissolved_oxygen_CC.pdf |
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ftunstandrewcris:oai:risweb.st-andrews.ac.uk:publications/efd1f50e-9e8c-47a3-bbfc-2eea5b794cc1 2023-05-15T13:39:30+02:00 Productivity and dissolved oxygen controls on the Southern Ocean deep‐sea benthos during the Antarctic Cold Reversal Stewart, Joseph A. Li, Tao Spooner, Peter T. Burke, Andrea Chen, Tianyu Roberts, Jenny Rae, James W. B. Peck, Victoria Kender, Sev Liu, Qian Robinson, Laura F. 2021-10-19 application/pdf https://risweb.st-andrews.ac.uk/portal/en/researchoutput/productivity-and-dissolved-oxygen-controls-on-the-southern-ocean-deepsea-benthos-during-the-antarctic-cold-reversal(efd1f50e-9e8c-47a3-bbfc-2eea5b794cc1).html https://doi.org/10.1029/2021pa004288 https://research-repository.st-andrews.ac.uk/bitstream/10023/24176/1/Stewart_2021_PP_Productivity_dissolved_oxygen_CC.pdf eng eng info:eu-repo/semantics/openAccess Stewart , J A , Li , T , Spooner , P T , Burke , A , Chen , T , Roberts , J , Rae , J W B , Peck , V , Kender , S , Liu , Q & Robinson , L F 2021 , ' Productivity and dissolved oxygen controls on the Southern Ocean deep‐sea benthos during the Antarctic Cold Reversal ' , Paleoceanography and Paleoclimatology , vol. 36 , no. 10 , e2021PA004288 . https://doi.org/10.1029/2021pa004288 Coral Foraminifera Drake Passage Deglacial article 2021 ftunstandrewcris https://doi.org/10.1029/2021pa004288 2022-06-02T07:53:32Z The Antarctic Cold Reversal (ACR; 14.7 to 13 thousand years ago; ka) phase of the last deglaciation saw a pause in the rise of atmospheric CO 2 and Antarctic temperature, that contrasted with warming in the North. A re-expansion of sea ice and a northward shift in the position of the westerly winds in the Southern Ocean are well-documented, but the response of deep-sea biota and the primary drivers of habitat viability remain unclear. Here we present a new perspective on ecological changes in the deglacial Southern Ocean, including multi-faunal benthic assemblage (foraminifera and cold-water corals) and coral geochemical data (Ba/Ca and δ 11 B) from the Drake Passage. Our records show that, during the ACR, peak abundances of thick-walled benthic foraminifera Uvigerina bifurcata and corals are observed at shallow depths in the sub-Antarctic (∼300 m), while coral populations at greater depths and further south diminished. Our ecological and geochemical data indicate that habitat shifts were dictated by (i) a northward migration of food supply (primary production) into the Subantarctic Zone and (ii) poorly oxygenated seawater at depth during this Antarctic cooling interval. Article in Journal/Newspaper Antarc* Antarctic Drake Passage Sea ice Southern Ocean University of St Andrews: Research Portal Antarctic Drake Passage Southern Ocean The Antarctic Paleoceanography and Paleoclimatology 36 10 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
Coral Foraminifera Drake Passage Deglacial |
spellingShingle |
Coral Foraminifera Drake Passage Deglacial Stewart, Joseph A. Li, Tao Spooner, Peter T. Burke, Andrea Chen, Tianyu Roberts, Jenny Rae, James W. B. Peck, Victoria Kender, Sev Liu, Qian Robinson, Laura F. Productivity and dissolved oxygen controls on the Southern Ocean deep‐sea benthos during the Antarctic Cold Reversal |
topic_facet |
Coral Foraminifera Drake Passage Deglacial |
description |
The Antarctic Cold Reversal (ACR; 14.7 to 13 thousand years ago; ka) phase of the last deglaciation saw a pause in the rise of atmospheric CO 2 and Antarctic temperature, that contrasted with warming in the North. A re-expansion of sea ice and a northward shift in the position of the westerly winds in the Southern Ocean are well-documented, but the response of deep-sea biota and the primary drivers of habitat viability remain unclear. Here we present a new perspective on ecological changes in the deglacial Southern Ocean, including multi-faunal benthic assemblage (foraminifera and cold-water corals) and coral geochemical data (Ba/Ca and δ 11 B) from the Drake Passage. Our records show that, during the ACR, peak abundances of thick-walled benthic foraminifera Uvigerina bifurcata and corals are observed at shallow depths in the sub-Antarctic (∼300 m), while coral populations at greater depths and further south diminished. Our ecological and geochemical data indicate that habitat shifts were dictated by (i) a northward migration of food supply (primary production) into the Subantarctic Zone and (ii) poorly oxygenated seawater at depth during this Antarctic cooling interval. |
format |
Article in Journal/Newspaper |
author |
Stewart, Joseph A. Li, Tao Spooner, Peter T. Burke, Andrea Chen, Tianyu Roberts, Jenny Rae, James W. B. Peck, Victoria Kender, Sev Liu, Qian Robinson, Laura F. |
author_facet |
Stewart, Joseph A. Li, Tao Spooner, Peter T. Burke, Andrea Chen, Tianyu Roberts, Jenny Rae, James W. B. Peck, Victoria Kender, Sev Liu, Qian Robinson, Laura F. |
author_sort |
Stewart, Joseph A. |
title |
Productivity and dissolved oxygen controls on the Southern Ocean deep‐sea benthos during the Antarctic Cold Reversal |
title_short |
Productivity and dissolved oxygen controls on the Southern Ocean deep‐sea benthos during the Antarctic Cold Reversal |
title_full |
Productivity and dissolved oxygen controls on the Southern Ocean deep‐sea benthos during the Antarctic Cold Reversal |
title_fullStr |
Productivity and dissolved oxygen controls on the Southern Ocean deep‐sea benthos during the Antarctic Cold Reversal |
title_full_unstemmed |
Productivity and dissolved oxygen controls on the Southern Ocean deep‐sea benthos during the Antarctic Cold Reversal |
title_sort |
productivity and dissolved oxygen controls on the southern ocean deep‐sea benthos during the antarctic cold reversal |
publishDate |
2021 |
url |
https://risweb.st-andrews.ac.uk/portal/en/researchoutput/productivity-and-dissolved-oxygen-controls-on-the-southern-ocean-deepsea-benthos-during-the-antarctic-cold-reversal(efd1f50e-9e8c-47a3-bbfc-2eea5b794cc1).html https://doi.org/10.1029/2021pa004288 https://research-repository.st-andrews.ac.uk/bitstream/10023/24176/1/Stewart_2021_PP_Productivity_dissolved_oxygen_CC.pdf |
geographic |
Antarctic Drake Passage Southern Ocean The Antarctic |
geographic_facet |
Antarctic Drake Passage Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Drake Passage Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Drake Passage Sea ice Southern Ocean |
op_source |
Stewart , J A , Li , T , Spooner , P T , Burke , A , Chen , T , Roberts , J , Rae , J W B , Peck , V , Kender , S , Liu , Q & Robinson , L F 2021 , ' Productivity and dissolved oxygen controls on the Southern Ocean deep‐sea benthos during the Antarctic Cold Reversal ' , Paleoceanography and Paleoclimatology , vol. 36 , no. 10 , e2021PA004288 . https://doi.org/10.1029/2021pa004288 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2021pa004288 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
36 |
container_issue |
10 |
_version_ |
1766119721444311040 |