Sedimentological investigations and age model on profile PS58/254
Modern global warming is likely to cause future melting of Earth's polar ice sheets that may result in dramatic sea-level rise. A possible collapse of the West Antarctic Ice Sheet (WAIS) alone, which is considered highly vulnerable as it is mainly based below sea level, may raise global sea lev...
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2009
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Online Access: | https://doi.pangaea.de/10.1594/PANGAEA.701224 https://doi.org/10.1594/PANGAEA.701224 |
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.701224 2023-05-15T13:24:04+02:00 Sedimentological investigations and age model on profile PS58/254 Hillenbrand, Claus-Dieter Kuhn, Gerhard Frederichs, Thomas MEDIAN LATITUDE: -69.401803 * MEDIAN LONGITUDE: -90.845886 * SOUTH-BOUND LATITUDE: -71.150000 * WEST-BOUND LONGITUDE: -119.918330 * NORTH-BOUND LATITUDE: -68.732500 * EAST-BOUND LONGITUDE: -5.849660 * DATE/TIME START: 1985-12-28T20:53:00 * DATE/TIME END: 2001-03-10T02:45:00 2009-04-06 application/zip, 11 datasets https://doi.pangaea.de/10.1594/PANGAEA.701224 https://doi.org/10.1594/PANGAEA.701224 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.701224 https://doi.org/10.1594/PANGAEA.701224 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Hillenbrand, Claus-Dieter; Kuhn, Gerhard; Frederichs, Thomas (2009): Record of a Mid-Pleistocene depositional anomaly in West Antarctic continental margin sediments: An indicator for ice-sheet collapse? Quaternary Science Reviews, 28(13-14), 1147-1159, https://doi.org/10.1016/j.quascirev.2008.12.010 Amundsen Sea ANT-IV/3 ANT-V/4 ANT-XI/3 ANT-XVIII/5a Atka Bay AWI_Paleo Eastern Weddell Sea Southern Ocean Gravity corer (Kiel type) KL MUC MultiCorer Paleoenvironmental Reconstructions from Marine Sediments @ AWI Piston corer (BGR type) Polarstern PS08 PS08/366 PS10 PS10/816 PS1388-3 PS1506-1 PS2547-3 PS29 PS29/063 PS58 PS58/254-1 PS58/254-2 SL Southeast Pacific Dataset 2009 ftpangaea https://doi.org/10.1594/PANGAEA.701224 https://doi.org/10.1016/j.quascirev.2008.12.010 2023-01-20T07:31:12Z Modern global warming is likely to cause future melting of Earth's polar ice sheets that may result in dramatic sea-level rise. A possible collapse of the West Antarctic Ice Sheet (WAIS) alone, which is considered highly vulnerable as it is mainly based below sea level, may raise global sea level by up to 5-6 m. Despite the importance of the WAIS for changes in global sea level, its response to the glacial-interglacial cycles of the Quaternary is poorly constrained. Moreover, the geological evidence for the disintegration of the WAIS at some time within the last ca. 750 kyr, possibly during Marine Isotope Stage (MIS) 11 (424-374 ka), is ambiguous. Here we present physical properties, palaeomagnetic, geochemical and clay mineralogical data from a glaciomarine sedimentary sequence that was recovered from the West Antarctic continental margin in the Amundsen Sea and spans more than the last 1 Myr. Within the sedimentary sequence, proxies for biological productivity (such as biogenic opal and the barium/aluminum ratio) and the supply of lithogenic detritus from the West Antarctic hinterland (such as ice-rafted debris and clay minerals) exhibit cyclic fluctuations in accordance with the glacial-interglacial cycles of the Quaternary. A prominent depositional anomaly spans MIS 15-MIS 13 (621-478 ka). The proxies for biological productivity and lithogenic sediment supply indicate that this interval has the characteristics of a single, prolonged interglacial period. Even though no proxy suggests environmental conditions much different from today, we conclude that, if the WAIS collapsed during the last 800 kyr, then MIS 15-MIS 13 was the most likely time period. Apparently, the duration rather than the strength of interglacial conditions was the crucial factor for the WAIS drawdown. A comparison with various marine and terrestrial climate archives from around the world corroborates that unusual environmental conditions prevailed throughout MIS 15-MIS 13. Some of these anomalies are observed in the pelagic Southern Ocean ... Dataset Amundsen Sea Antarc* Antarctic Ice Sheet Southern Ocean Weddell Sea PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Southern Ocean Weddell Sea Amundsen Sea West Antarctic Ice Sheet Pacific Weddell Atka ENVELOPE(151.789,151.789,60.835,60.835) ENVELOPE(-119.918330,-5.849660,-68.732500,-71.150000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Amundsen Sea ANT-IV/3 ANT-V/4 ANT-XI/3 ANT-XVIII/5a Atka Bay AWI_Paleo Eastern Weddell Sea Southern Ocean Gravity corer (Kiel type) KL MUC MultiCorer Paleoenvironmental Reconstructions from Marine Sediments @ AWI Piston corer (BGR type) Polarstern PS08 PS08/366 PS10 PS10/816 PS1388-3 PS1506-1 PS2547-3 PS29 PS29/063 PS58 PS58/254-1 PS58/254-2 SL Southeast Pacific |
spellingShingle |
Amundsen Sea ANT-IV/3 ANT-V/4 ANT-XI/3 ANT-XVIII/5a Atka Bay AWI_Paleo Eastern Weddell Sea Southern Ocean Gravity corer (Kiel type) KL MUC MultiCorer Paleoenvironmental Reconstructions from Marine Sediments @ AWI Piston corer (BGR type) Polarstern PS08 PS08/366 PS10 PS10/816 PS1388-3 PS1506-1 PS2547-3 PS29 PS29/063 PS58 PS58/254-1 PS58/254-2 SL Southeast Pacific Hillenbrand, Claus-Dieter Kuhn, Gerhard Frederichs, Thomas Sedimentological investigations and age model on profile PS58/254 |
topic_facet |
Amundsen Sea ANT-IV/3 ANT-V/4 ANT-XI/3 ANT-XVIII/5a Atka Bay AWI_Paleo Eastern Weddell Sea Southern Ocean Gravity corer (Kiel type) KL MUC MultiCorer Paleoenvironmental Reconstructions from Marine Sediments @ AWI Piston corer (BGR type) Polarstern PS08 PS08/366 PS10 PS10/816 PS1388-3 PS1506-1 PS2547-3 PS29 PS29/063 PS58 PS58/254-1 PS58/254-2 SL Southeast Pacific |
description |
Modern global warming is likely to cause future melting of Earth's polar ice sheets that may result in dramatic sea-level rise. A possible collapse of the West Antarctic Ice Sheet (WAIS) alone, which is considered highly vulnerable as it is mainly based below sea level, may raise global sea level by up to 5-6 m. Despite the importance of the WAIS for changes in global sea level, its response to the glacial-interglacial cycles of the Quaternary is poorly constrained. Moreover, the geological evidence for the disintegration of the WAIS at some time within the last ca. 750 kyr, possibly during Marine Isotope Stage (MIS) 11 (424-374 ka), is ambiguous. Here we present physical properties, palaeomagnetic, geochemical and clay mineralogical data from a glaciomarine sedimentary sequence that was recovered from the West Antarctic continental margin in the Amundsen Sea and spans more than the last 1 Myr. Within the sedimentary sequence, proxies for biological productivity (such as biogenic opal and the barium/aluminum ratio) and the supply of lithogenic detritus from the West Antarctic hinterland (such as ice-rafted debris and clay minerals) exhibit cyclic fluctuations in accordance with the glacial-interglacial cycles of the Quaternary. A prominent depositional anomaly spans MIS 15-MIS 13 (621-478 ka). The proxies for biological productivity and lithogenic sediment supply indicate that this interval has the characteristics of a single, prolonged interglacial period. Even though no proxy suggests environmental conditions much different from today, we conclude that, if the WAIS collapsed during the last 800 kyr, then MIS 15-MIS 13 was the most likely time period. Apparently, the duration rather than the strength of interglacial conditions was the crucial factor for the WAIS drawdown. A comparison with various marine and terrestrial climate archives from around the world corroborates that unusual environmental conditions prevailed throughout MIS 15-MIS 13. Some of these anomalies are observed in the pelagic Southern Ocean ... |
format |
Dataset |
author |
Hillenbrand, Claus-Dieter Kuhn, Gerhard Frederichs, Thomas |
author_facet |
Hillenbrand, Claus-Dieter Kuhn, Gerhard Frederichs, Thomas |
author_sort |
Hillenbrand, Claus-Dieter |
title |
Sedimentological investigations and age model on profile PS58/254 |
title_short |
Sedimentological investigations and age model on profile PS58/254 |
title_full |
Sedimentological investigations and age model on profile PS58/254 |
title_fullStr |
Sedimentological investigations and age model on profile PS58/254 |
title_full_unstemmed |
Sedimentological investigations and age model on profile PS58/254 |
title_sort |
sedimentological investigations and age model on profile ps58/254 |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.701224 https://doi.org/10.1594/PANGAEA.701224 |
op_coverage |
MEDIAN LATITUDE: -69.401803 * MEDIAN LONGITUDE: -90.845886 * SOUTH-BOUND LATITUDE: -71.150000 * WEST-BOUND LONGITUDE: -119.918330 * NORTH-BOUND LATITUDE: -68.732500 * EAST-BOUND LONGITUDE: -5.849660 * DATE/TIME START: 1985-12-28T20:53:00 * DATE/TIME END: 2001-03-10T02:45:00 |
long_lat |
ENVELOPE(151.789,151.789,60.835,60.835) ENVELOPE(-119.918330,-5.849660,-68.732500,-71.150000) |
geographic |
Antarctic Southern Ocean Weddell Sea Amundsen Sea West Antarctic Ice Sheet Pacific Weddell Atka |
geographic_facet |
Antarctic Southern Ocean Weddell Sea Amundsen Sea West Antarctic Ice Sheet Pacific Weddell Atka |
genre |
Amundsen Sea Antarc* Antarctic Ice Sheet Southern Ocean Weddell Sea |
genre_facet |
Amundsen Sea Antarc* Antarctic Ice Sheet Southern Ocean Weddell Sea |
op_source |
Supplement to: Hillenbrand, Claus-Dieter; Kuhn, Gerhard; Frederichs, Thomas (2009): Record of a Mid-Pleistocene depositional anomaly in West Antarctic continental margin sediments: An indicator for ice-sheet collapse? Quaternary Science Reviews, 28(13-14), 1147-1159, https://doi.org/10.1016/j.quascirev.2008.12.010 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.701224 https://doi.org/10.1594/PANGAEA.701224 |
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.701224 https://doi.org/10.1016/j.quascirev.2008.12.010 |
_version_ |
1766377252490051584 |