Sedimentological investigations and age model on profile PS58/254, 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
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...
Main Authors: | , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
PANGAEA - Data Publisher for Earth & Environmental Science
2009
|
Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.701224 https://doi.pangaea.de/10.1594/PANGAEA.701224 |
id |
ftdatacite:10.1594/pangaea.701224 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.1594/pangaea.701224 2023-05-15T13:24:20+02:00 Sedimentological investigations and age model on profile PS58/254, 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 Hillenbrand, Claus-Dieter Kuhn, Gerhard Frederichs, Thomas 2009 application/zip https://dx.doi.org/10.1594/pangaea.701224 https://doi.pangaea.de/10.1594/PANGAEA.701224 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1016/j.quascirev.2008.12.010 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Piston corer BGR type MultiCorer Gravity corer Kiel type ANT-XVIII/5a ANT-IV/3 ANT-V/4 ANT-XI/3 Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo article Supplementary Collection of Datasets Collection 2009 ftdatacite https://doi.org/10.1594/pangaea.701224 https://doi.org/10.1016/j.quascirev.2008.12.010 2022-02-09T12:06:21Z 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 and the South Atlantic and might originate in major ice-sheet drawdown in Antarctica, but further research is required to test this hypothesis. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Antarctic Southern Ocean Amundsen Sea West Antarctic Ice Sheet |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Piston corer BGR type MultiCorer Gravity corer Kiel type ANT-XVIII/5a ANT-IV/3 ANT-V/4 ANT-XI/3 Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo |
spellingShingle |
Piston corer BGR type MultiCorer Gravity corer Kiel type ANT-XVIII/5a ANT-IV/3 ANT-V/4 ANT-XI/3 Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo Hillenbrand, Claus-Dieter Kuhn, Gerhard Frederichs, Thomas Sedimentological investigations and age model on profile PS58/254, 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 |
topic_facet |
Piston corer BGR type MultiCorer Gravity corer Kiel type ANT-XVIII/5a ANT-IV/3 ANT-V/4 ANT-XI/3 Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo |
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 and the South Atlantic and might originate in major ice-sheet drawdown in Antarctica, but further research is required to test this hypothesis. |
format |
Article in Journal/Newspaper |
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, 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 |
title_short |
Sedimentological investigations and age model on profile PS58/254, 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 |
title_full |
Sedimentological investigations and age model on profile PS58/254, 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 |
title_fullStr |
Sedimentological investigations and age model on profile PS58/254, 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 |
title_full_unstemmed |
Sedimentological investigations and age model on profile PS58/254, 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 |
title_sort |
sedimentological investigations and age model on profile ps58/254, 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 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2009 |
url |
https://dx.doi.org/10.1594/pangaea.701224 https://doi.pangaea.de/10.1594/PANGAEA.701224 |
geographic |
Antarctic Southern Ocean Amundsen Sea West Antarctic Ice Sheet |
geographic_facet |
Antarctic Southern Ocean Amundsen Sea West Antarctic Ice Sheet |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Southern Ocean |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Ice Sheet Southern Ocean |
op_relation |
https://dx.doi.org/10.1016/j.quascirev.2008.12.010 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.701224 https://doi.org/10.1016/j.quascirev.2008.12.010 |
_version_ |
1766378794467196928 |