Holocene paleoceanographic variability in Robertson Bay, Ross Sea, Antarctica: A marine record of ocean, ice sheet, and climate connectivity
Accelerating ocean-driven basal melting of Antarctic ice shelves in recent decades has implications for sea level rise and global overturning circulation. Here, we reconstruct oceanographic conditions at the confluence of the Ross Sea and the Southern Ocean by analyzing a multi-proxy Holocene marine...
Published in: | Quaternary Science Reviews |
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Format: | Article in Journal/Newspaper |
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2024
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Online Access: | https://archimer.ifremer.fr/doc/00889/100064/110319.pdf https://archimer.ifremer.fr/doc/00889/100064/110320.pdf https://archimer.ifremer.fr/doc/00889/100064/110321.xlsx https://doi.org/10.1016/j.quascirev.2024.108635 https://archimer.ifremer.fr/doc/00889/100064/ |
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ftarchimer:oai:archimer.ifremer.fr:100064 2024-06-09T07:40:01+00:00 Holocene paleoceanographic variability in Robertson Bay, Ross Sea, Antarctica: A marine record of ocean, ice sheet, and climate connectivity Truax, Olivia J. Riesselman, Christina R. Wilson, Gary S. Stevens, Craig L. Parker, Rebecca L. Lee, Jae Il Mckay, Robert M. Rosenheim, Brad E. Ginnane, Catherine E. Turnbull, Jocelyn C. Moon, Heung Soo Lee, Min Kyung Dagg, Bob Yoo, Kyu-cheul 2024-05 application/pdf https://archimer.ifremer.fr/doc/00889/100064/110319.pdf https://archimer.ifremer.fr/doc/00889/100064/110320.pdf https://archimer.ifremer.fr/doc/00889/100064/110321.xlsx https://doi.org/10.1016/j.quascirev.2024.108635 https://archimer.ifremer.fr/doc/00889/100064/ eng eng Elsevier BV https://archimer.ifremer.fr/doc/00889/100064/110319.pdf https://archimer.ifremer.fr/doc/00889/100064/110320.pdf https://archimer.ifremer.fr/doc/00889/100064/110321.xlsx doi:10.1016/j.quascirev.2024.108635 https://archimer.ifremer.fr/doc/00889/100064/ info:eu-repo/semantics/openAccess restricted use Quaternary Science Reviews (0277-3791) (Elsevier BV), 2024-05 , Vol. 332 , P. 108635 (18p.) Antarctica Holocene Ross Sea Sea ice Circumpolar Deep Water Paleoceanography Diatoms Sedimentology text Article info:eu-repo/semantics/article 2024 ftarchimer https://doi.org/10.1016/j.quascirev.2024.108635 2024-05-16T09:24:32Z Accelerating ocean-driven basal melting of Antarctic ice shelves in recent decades has implications for sea level rise and global overturning circulation. Here, we reconstruct oceanographic conditions at the confluence of the Ross Sea and the Southern Ocean by analyzing a multi-proxy Holocene marine sedimentary record collected from Robertson Bay. A ramped pyrolysis oxidation radiocarbon age-depth model provides a timeline for glacial behavior and oceanographic changes over the last 6700 years. The diatom assemblage, magnetic susceptibility, grain size, total organic carbon and nitrogen, trace elements, and bulk δ13C are used as proxies for changing ocean and glacial conditions, which we interpret in the context of modern oceanographic measurements. Our record shows evidence of persistent ice cover in the northwestern Ross Sea during the Antarctic mid-Holocene climate optimum (ca. 5 cal kyr BP). Based on this observation, we suggest that meltwater and iceberg discharge associated with ice sheet retreat in the Ross Sea region altered local oceanography during the mid-Holocene. The onset of modern style oceanographic conditions in Robertson Bay occurred at ca. 4 cal kyr BP. Stable late Holocene conditions in are punctuated by a period of enhanced polynya activity and upwelling of nutrient rich Circumpolar Deep Water ca. 0.8 cal kyr BP and an increase in the seasonal duration of sea ice after 0.7 cal kyr BP, during the Little Ice Age. The response of the marine environment in Robertson Bay to mid-Holocene ice sheet retreat and natural climate variability during the last millennium underscores the sensitivity of the Antarctic ice-ocean interface to projected changes in coming decades. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Ice Shelves Iceberg* Ross Sea Sea ice Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Antarctic Robertson Bay ENVELOPE(170.000,170.000,-71.417,-71.417) Ross Sea Southern Ocean The Antarctic Quaternary Science Reviews 332 108635 |
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 |
Antarctica Holocene Ross Sea Sea ice Circumpolar Deep Water Paleoceanography Diatoms Sedimentology |
spellingShingle |
Antarctica Holocene Ross Sea Sea ice Circumpolar Deep Water Paleoceanography Diatoms Sedimentology Truax, Olivia J. Riesselman, Christina R. Wilson, Gary S. Stevens, Craig L. Parker, Rebecca L. Lee, Jae Il Mckay, Robert M. Rosenheim, Brad E. Ginnane, Catherine E. Turnbull, Jocelyn C. Moon, Heung Soo Lee, Min Kyung Dagg, Bob Yoo, Kyu-cheul Holocene paleoceanographic variability in Robertson Bay, Ross Sea, Antarctica: A marine record of ocean, ice sheet, and climate connectivity |
topic_facet |
Antarctica Holocene Ross Sea Sea ice Circumpolar Deep Water Paleoceanography Diatoms Sedimentology |
description |
Accelerating ocean-driven basal melting of Antarctic ice shelves in recent decades has implications for sea level rise and global overturning circulation. Here, we reconstruct oceanographic conditions at the confluence of the Ross Sea and the Southern Ocean by analyzing a multi-proxy Holocene marine sedimentary record collected from Robertson Bay. A ramped pyrolysis oxidation radiocarbon age-depth model provides a timeline for glacial behavior and oceanographic changes over the last 6700 years. The diatom assemblage, magnetic susceptibility, grain size, total organic carbon and nitrogen, trace elements, and bulk δ13C are used as proxies for changing ocean and glacial conditions, which we interpret in the context of modern oceanographic measurements. Our record shows evidence of persistent ice cover in the northwestern Ross Sea during the Antarctic mid-Holocene climate optimum (ca. 5 cal kyr BP). Based on this observation, we suggest that meltwater and iceberg discharge associated with ice sheet retreat in the Ross Sea region altered local oceanography during the mid-Holocene. The onset of modern style oceanographic conditions in Robertson Bay occurred at ca. 4 cal kyr BP. Stable late Holocene conditions in are punctuated by a period of enhanced polynya activity and upwelling of nutrient rich Circumpolar Deep Water ca. 0.8 cal kyr BP and an increase in the seasonal duration of sea ice after 0.7 cal kyr BP, during the Little Ice Age. The response of the marine environment in Robertson Bay to mid-Holocene ice sheet retreat and natural climate variability during the last millennium underscores the sensitivity of the Antarctic ice-ocean interface to projected changes in coming decades. |
format |
Article in Journal/Newspaper |
author |
Truax, Olivia J. Riesselman, Christina R. Wilson, Gary S. Stevens, Craig L. Parker, Rebecca L. Lee, Jae Il Mckay, Robert M. Rosenheim, Brad E. Ginnane, Catherine E. Turnbull, Jocelyn C. Moon, Heung Soo Lee, Min Kyung Dagg, Bob Yoo, Kyu-cheul |
author_facet |
Truax, Olivia J. Riesselman, Christina R. Wilson, Gary S. Stevens, Craig L. Parker, Rebecca L. Lee, Jae Il Mckay, Robert M. Rosenheim, Brad E. Ginnane, Catherine E. Turnbull, Jocelyn C. Moon, Heung Soo Lee, Min Kyung Dagg, Bob Yoo, Kyu-cheul |
author_sort |
Truax, Olivia J. |
title |
Holocene paleoceanographic variability in Robertson Bay, Ross Sea, Antarctica: A marine record of ocean, ice sheet, and climate connectivity |
title_short |
Holocene paleoceanographic variability in Robertson Bay, Ross Sea, Antarctica: A marine record of ocean, ice sheet, and climate connectivity |
title_full |
Holocene paleoceanographic variability in Robertson Bay, Ross Sea, Antarctica: A marine record of ocean, ice sheet, and climate connectivity |
title_fullStr |
Holocene paleoceanographic variability in Robertson Bay, Ross Sea, Antarctica: A marine record of ocean, ice sheet, and climate connectivity |
title_full_unstemmed |
Holocene paleoceanographic variability in Robertson Bay, Ross Sea, Antarctica: A marine record of ocean, ice sheet, and climate connectivity |
title_sort |
holocene paleoceanographic variability in robertson bay, ross sea, antarctica: a marine record of ocean, ice sheet, and climate connectivity |
publisher |
Elsevier BV |
publishDate |
2024 |
url |
https://archimer.ifremer.fr/doc/00889/100064/110319.pdf https://archimer.ifremer.fr/doc/00889/100064/110320.pdf https://archimer.ifremer.fr/doc/00889/100064/110321.xlsx https://doi.org/10.1016/j.quascirev.2024.108635 https://archimer.ifremer.fr/doc/00889/100064/ |
long_lat |
ENVELOPE(170.000,170.000,-71.417,-71.417) |
geographic |
Antarctic Robertson Bay Ross Sea Southern Ocean The Antarctic |
geographic_facet |
Antarctic Robertson Bay Ross Sea Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelves Iceberg* Ross Sea Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Ice Shelves Iceberg* Ross Sea Sea ice Southern Ocean |
op_source |
Quaternary Science Reviews (0277-3791) (Elsevier BV), 2024-05 , Vol. 332 , P. 108635 (18p.) |
op_relation |
https://archimer.ifremer.fr/doc/00889/100064/110319.pdf https://archimer.ifremer.fr/doc/00889/100064/110320.pdf https://archimer.ifremer.fr/doc/00889/100064/110321.xlsx doi:10.1016/j.quascirev.2024.108635 https://archimer.ifremer.fr/doc/00889/100064/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1016/j.quascirev.2024.108635 |
container_title |
Quaternary Science Reviews |
container_volume |
332 |
container_start_page |
108635 |
_version_ |
1801383531244421120 |