Correlation of Ice-Rafted Detritus in South Atlantic Sediments with Climate Proxies in Polar Ice over the Last Glacial Period
Previous study identified 6–7 millennial-scale episodes of South Atlantic ice-rafted sediment deposition (SA events) during the glaciation. Questions remain, however, regarding their origin, significance for sea-ice and/or Antarctic ice-sheet dynamics, and relationship to climate. Here I correlate s...
Published in: | The International Journal of Ocean and Climate Systems |
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Online Access: | https://doi.org/10.1260/1759-3131.4.1.1 https://doaj.org/article/a9e8affb067e438baa83158b82c5512c |
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ftdoajarticles:oai:doaj.org/article:a9e8affb067e438baa83158b82c5512c 2023-05-15T13:57:29+02:00 Correlation of Ice-Rafted Detritus in South Atlantic Sediments with Climate Proxies in Polar Ice over the Last Glacial Period Sharon L. Kanfoush 2013-03-01T00:00:00Z https://doi.org/10.1260/1759-3131.4.1.1 https://doaj.org/article/a9e8affb067e438baa83158b82c5512c EN eng SAGE Publishing https://doi.org/10.1260/1759-3131.4.1.1 https://doaj.org/toc/1759-3131 https://doaj.org/toc/1759-314X 1759-3131 1759-314X doi:10.1260/1759-3131.4.1.1 https://doaj.org/article/a9e8affb067e438baa83158b82c5512c International Journal of Ocean and Climate Systems, Vol 4 (2013) Ocean engineering TC1501-1800 Oceanography GC1-1581 article 2013 ftdoajarticles https://doi.org/10.1260/1759-3131.4.1.1 2022-12-31T01:10:20Z Previous study identified 6–7 millennial-scale episodes of South Atlantic ice-rafted sediment deposition (SA events) during the glaciation. Questions remain, however, regarding their origin, significance for sea-ice and/or Antarctic ice-sheet dynamics, and relationship to climate. Here I correlate sediment core (TTN057–21) SA events to Greenland and Antarctic ice using two independent methods, stable isotopes and geomagnetic paleointensity, placing SA events in the context of polar climate change in both hemispheres. Marine isotopic stage (MIS) 3 SA events generally coincided with Greenland interstadials and with cooling following Antarctic warm events (A1-A4). This anti-phase behavior is best illustrated when SA0 coincided with both the Antarctic Cold Reversal and Bolling-Allerod warming in Greenland. Moreover, SA events coincide with sea-level rises during the deglaciation (mwp1A) and MIS 3 (30.4, 38.3, 43.7, 51.5 ka), implying unpinning of grounded Weddell Sea region ice masses discharged debris-laden bergs that had a chilling effect on South Atlantic surface temperatures. Article in Journal/Newspaper Antarc* Antarctic Greenland Ice Sheet Sea ice Weddell Sea Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Weddell Sea Greenland Weddell The International Journal of Ocean and Climate Systems 4 1 1 20 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ocean engineering TC1501-1800 Oceanography GC1-1581 |
spellingShingle |
Ocean engineering TC1501-1800 Oceanography GC1-1581 Sharon L. Kanfoush Correlation of Ice-Rafted Detritus in South Atlantic Sediments with Climate Proxies in Polar Ice over the Last Glacial Period |
topic_facet |
Ocean engineering TC1501-1800 Oceanography GC1-1581 |
description |
Previous study identified 6–7 millennial-scale episodes of South Atlantic ice-rafted sediment deposition (SA events) during the glaciation. Questions remain, however, regarding their origin, significance for sea-ice and/or Antarctic ice-sheet dynamics, and relationship to climate. Here I correlate sediment core (TTN057–21) SA events to Greenland and Antarctic ice using two independent methods, stable isotopes and geomagnetic paleointensity, placing SA events in the context of polar climate change in both hemispheres. Marine isotopic stage (MIS) 3 SA events generally coincided with Greenland interstadials and with cooling following Antarctic warm events (A1-A4). This anti-phase behavior is best illustrated when SA0 coincided with both the Antarctic Cold Reversal and Bolling-Allerod warming in Greenland. Moreover, SA events coincide with sea-level rises during the deglaciation (mwp1A) and MIS 3 (30.4, 38.3, 43.7, 51.5 ka), implying unpinning of grounded Weddell Sea region ice masses discharged debris-laden bergs that had a chilling effect on South Atlantic surface temperatures. |
format |
Article in Journal/Newspaper |
author |
Sharon L. Kanfoush |
author_facet |
Sharon L. Kanfoush |
author_sort |
Sharon L. Kanfoush |
title |
Correlation of Ice-Rafted Detritus in South Atlantic Sediments with Climate Proxies in Polar Ice over the Last Glacial Period |
title_short |
Correlation of Ice-Rafted Detritus in South Atlantic Sediments with Climate Proxies in Polar Ice over the Last Glacial Period |
title_full |
Correlation of Ice-Rafted Detritus in South Atlantic Sediments with Climate Proxies in Polar Ice over the Last Glacial Period |
title_fullStr |
Correlation of Ice-Rafted Detritus in South Atlantic Sediments with Climate Proxies in Polar Ice over the Last Glacial Period |
title_full_unstemmed |
Correlation of Ice-Rafted Detritus in South Atlantic Sediments with Climate Proxies in Polar Ice over the Last Glacial Period |
title_sort |
correlation of ice-rafted detritus in south atlantic sediments with climate proxies in polar ice over the last glacial period |
publisher |
SAGE Publishing |
publishDate |
2013 |
url |
https://doi.org/10.1260/1759-3131.4.1.1 https://doaj.org/article/a9e8affb067e438baa83158b82c5512c |
geographic |
Antarctic The Antarctic Weddell Sea Greenland Weddell |
geographic_facet |
Antarctic The Antarctic Weddell Sea Greenland Weddell |
genre |
Antarc* Antarctic Greenland Ice Sheet Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Greenland Ice Sheet Sea ice Weddell Sea |
op_source |
International Journal of Ocean and Climate Systems, Vol 4 (2013) |
op_relation |
https://doi.org/10.1260/1759-3131.4.1.1 https://doaj.org/toc/1759-3131 https://doaj.org/toc/1759-314X 1759-3131 1759-314X doi:10.1260/1759-3131.4.1.1 https://doaj.org/article/a9e8affb067e438baa83158b82c5512c |
op_doi |
https://doi.org/10.1260/1759-3131.4.1.1 |
container_title |
The International Journal of Ocean and Climate Systems |
container_volume |
4 |
container_issue |
1 |
container_start_page |
1 |
op_container_end_page |
20 |
_version_ |
1766265159068680192 |