Ice-rafted debris record in the Prydz Bay
Ice-rafted debris mass accumulation rates (IRD MAR) at a drill site on the Antarctic continental margin are investigated to evaluate the linkages between East Antarctic Ice Sheet extent and Southern Ocean temperatures in the early to mid-Pliocene. ODP Site 1165 is within 400 km of the Antarctic coas...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.832115 2023-05-15T13:22:00+02:00 Ice-rafted debris record in the Prydz Bay Passchier, Sandra LATITUDE: -64.379650 * LONGITUDE: 67.219050 * DATE/TIME START: 2000-01-29T05:15:00 * DATE/TIME END: 2000-02-04T05:30:00 2011-04-25 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.832115 https://doi.org/10.1594/PANGAEA.832115 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.832115 https://doi.org/10.1594/PANGAEA.832115 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Passchier, Sandra (2011): Linkages between East Antarctic Ice Sheet extent and Southern Ocean temperatures based on a Pliocene high-resolution record of ice-rafted debris off Prydz Bay, East Antarctica. Paleoceanography, 26(4), PA4204, https://doi.org/10.1029/2010PA002061 188-1165B DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg188 Ocean Drilling Program ODP Dataset 2011 ftpangaea https://doi.org/10.1594/PANGAEA.832115 https://doi.org/10.1029/2010PA002061 2023-01-20T07:33:16Z Ice-rafted debris mass accumulation rates (IRD MAR) at a drill site on the Antarctic continental margin are investigated to evaluate the linkages between East Antarctic Ice Sheet extent and Southern Ocean temperatures in the early to mid-Pliocene. ODP Site 1165 is within 400 km of the Antarctic coastline and in the direct pathway of icebergs released by the Amery Ice Shelf. The Amery Ice Shelf is the largest ice shelf in East Antarctica and it buttresses the Lambert Glacier drainage system, which accounts for 14% of the outflow from the East Antarctic Ice Sheet. IRD MAR were low during peak Southern Ocean warming in the early Pliocene. After a brief precursor, a tenfold increase in IRD MAR at 3.3 Ma marks the termination of the early Pliocene ice sheet minimum, coincident with the M2 glacial. For the mid-Pliocene, a strong correlation exists between the high-amplitude signal in the LR04 benthic stack and IRD MAR, suggesting linkages between East Antarctic ice extent, global ice volume and deep-water temperatures. The IRD record at Site 1165 provides evidence of greater sensitivity of the Lambert Glacier-Amery Ice Shelf system to Southern Ocean warming than is currently predicted by ice sheet models, which may relate to uncertainties in the understanding of ocean heat uptake, poleward heat transport and ice sheet-ocean interactions. Dataset Amery Ice Shelf Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Iceberg* Lambert Glacier Prydz Bay Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Southern Ocean The Antarctic East Antarctica Prydz Bay East Antarctic Ice Sheet Indian Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Amery Ice Shelf ENVELOPE(71.000,71.000,-69.750,-69.750) Lambert Glacier ENVELOPE(67.490,67.490,-73.065,-73.065) ENVELOPE(67.219050,67.219050,-64.379650,-64.379650) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
188-1165B DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg188 Ocean Drilling Program ODP |
spellingShingle |
188-1165B DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg188 Ocean Drilling Program ODP Passchier, Sandra Ice-rafted debris record in the Prydz Bay |
topic_facet |
188-1165B DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg188 Ocean Drilling Program ODP |
description |
Ice-rafted debris mass accumulation rates (IRD MAR) at a drill site on the Antarctic continental margin are investigated to evaluate the linkages between East Antarctic Ice Sheet extent and Southern Ocean temperatures in the early to mid-Pliocene. ODP Site 1165 is within 400 km of the Antarctic coastline and in the direct pathway of icebergs released by the Amery Ice Shelf. The Amery Ice Shelf is the largest ice shelf in East Antarctica and it buttresses the Lambert Glacier drainage system, which accounts for 14% of the outflow from the East Antarctic Ice Sheet. IRD MAR were low during peak Southern Ocean warming in the early Pliocene. After a brief precursor, a tenfold increase in IRD MAR at 3.3 Ma marks the termination of the early Pliocene ice sheet minimum, coincident with the M2 glacial. For the mid-Pliocene, a strong correlation exists between the high-amplitude signal in the LR04 benthic stack and IRD MAR, suggesting linkages between East Antarctic ice extent, global ice volume and deep-water temperatures. The IRD record at Site 1165 provides evidence of greater sensitivity of the Lambert Glacier-Amery Ice Shelf system to Southern Ocean warming than is currently predicted by ice sheet models, which may relate to uncertainties in the understanding of ocean heat uptake, poleward heat transport and ice sheet-ocean interactions. |
format |
Dataset |
author |
Passchier, Sandra |
author_facet |
Passchier, Sandra |
author_sort |
Passchier, Sandra |
title |
Ice-rafted debris record in the Prydz Bay |
title_short |
Ice-rafted debris record in the Prydz Bay |
title_full |
Ice-rafted debris record in the Prydz Bay |
title_fullStr |
Ice-rafted debris record in the Prydz Bay |
title_full_unstemmed |
Ice-rafted debris record in the Prydz Bay |
title_sort |
ice-rafted debris record in the prydz bay |
publisher |
PANGAEA |
publishDate |
2011 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.832115 https://doi.org/10.1594/PANGAEA.832115 |
op_coverage |
LATITUDE: -64.379650 * LONGITUDE: 67.219050 * DATE/TIME START: 2000-01-29T05:15:00 * DATE/TIME END: 2000-02-04T05:30:00 |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(71.000,71.000,-69.750,-69.750) ENVELOPE(67.490,67.490,-73.065,-73.065) ENVELOPE(67.219050,67.219050,-64.379650,-64.379650) |
geographic |
Antarctic Southern Ocean The Antarctic East Antarctica Prydz Bay East Antarctic Ice Sheet Indian Amery Amery Ice Shelf Lambert Glacier |
geographic_facet |
Antarctic Southern Ocean The Antarctic East Antarctica Prydz Bay East Antarctic Ice Sheet Indian Amery Amery Ice Shelf Lambert Glacier |
genre |
Amery Ice Shelf Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Iceberg* Lambert Glacier Prydz Bay Southern Ocean |
genre_facet |
Amery Ice Shelf Antarc* Antarctic Antarctica East Antarctica Ice Sheet Ice Shelf Iceberg* Lambert Glacier Prydz Bay Southern Ocean |
op_source |
Supplement to: Passchier, Sandra (2011): Linkages between East Antarctic Ice Sheet extent and Southern Ocean temperatures based on a Pliocene high-resolution record of ice-rafted debris off Prydz Bay, East Antarctica. Paleoceanography, 26(4), PA4204, https://doi.org/10.1029/2010PA002061 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.832115 https://doi.org/10.1594/PANGAEA.832115 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.832115 https://doi.org/10.1029/2010PA002061 |
_version_ |
1766362774211919872 |