Palaeoenvironmental records from the West Antarctic Peninsula drift sediments over the last 75 ka.
We present results of a multi-proxy study on marine sediment core JR179-PC466 recovered from the crest of a sediment drift off the West Antarctic Peninsula at approximately 2300 m water depth. The 10.45 m-long core consists dominantly of glaciomarine terrigenous sedi- ments, with only traces of calc...
Published in: | Geological Society, London, Special Publications |
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Language: | English |
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Geological Society of London
2012
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Online Access: | http://eprints.esc.cam.ac.uk/2606/ http://eprints.esc.cam.ac.uk/2606/1/Geological_Society,_London,_Special_Publications-2013-Vautravers-SP381.12-1.pdf http://eprints.esc.cam.ac.uk/2606/2/vautravers.png https://doi.org/10.1144/SP381.12 |
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ftucambridgeesc:oai:eprints.esc.cam.ac.uk:2606 2023-05-15T13:55:44+02:00 Palaeoenvironmental records from the West Antarctic Peninsula drift sediments over the last 75 ka. Vautravers, Maryline J. Hodell, David A. Channell, James E.T. Hillenbrand, Claus-Dieter Hall, Mike A. Smith, James Larter, Robert D. 2012 application/pdf image/png http://eprints.esc.cam.ac.uk/2606/ http://eprints.esc.cam.ac.uk/2606/1/Geological_Society,_London,_Special_Publications-2013-Vautravers-SP381.12-1.pdf http://eprints.esc.cam.ac.uk/2606/2/vautravers.png https://doi.org/10.1144/SP381.12 doi: doi 10.1144/SP381.12 en eng Geological Society of London http://eprints.esc.cam.ac.uk/2606/1/Geological_Society,_London,_Special_Publications-2013-Vautravers-SP381.12-1.pdf http://eprints.esc.cam.ac.uk/2606/2/vautravers.png Vautravers, Maryline J. and Hodell, David A. and Channell, James E.T. and Hillenbrand, Claus-Dieter and Hall, Mike A. and Smith, James and Larter, Robert D. (2012) Palaeoenvironmental records from the West Antarctic Peninsula drift sediments over the last 75 ka. In: Antarctic Palaeoenvironments and Earth-Surface Processes. Geological Society Special Publication, 381 . Geological Society of London. 01 - Climate Change and Earth-Ocean Atmosphere Systems Book Section PeerReviewed 2012 ftucambridgeesc https://doi.org/10.1144/SP381.12 2020-08-27T18:09:21Z We present results of a multi-proxy study on marine sediment core JR179-PC466 recovered from the crest of a sediment drift off the West Antarctic Peninsula at approximately 2300 m water depth. The 10.45 m-long core consists dominantly of glaciomarine terrigenous sedi- ments, with only traces of calcium carbonate (,1 wt%). Despite the very low abundance of calcar- eous foraminifera, planktonic shell numbers are sufficient for stable isotope analyses in two-thirds of the samples studied. The core chronology is based on oxygen isotope stratigraphy and corre- lation of its relative palaeomagnetic intensity (RPI) with a stacked reference curve. According to the age model, core PC466 spans the last 75 ka, with average sedimentation rates of between about 4 and 25 cm ka 21 . Planktonic foraminifera abundances fluctuate between 0 and 30 individ- uals per gram throughout the core, with minima observed during Marine Isotope Stage (MIS) 2 (14–29 ka before present, BP) and MIS4 (57–71 ka BP). Planktonic foraminifera are present in the Holocene but more abundant in sediments deposited during MIS3 (29–57 ka BP), owing to less dilution by terrigenous detritus and/or better carbonate preservation. During MIS3, forami- nifera maxima correlate with Antarctic warming events as recorded in the d 18 O signal of the EPICA Dronning Maud Land (EDML) ice core. They indicate higher planktonic foraminifera production and better carbonate preservation west of the Antarctic Peninsula during that time. The abundance of ice-rafted detritus (IRD) in core PC466 increased during the last deglaciation between about 19 and 11 ka BP, when numerous icebergs drifted across the core site, thereby releasing IRD. During this time, sea-level rise destabilized the Antarctic Peninsula (APIS) and West Antarctic (WAIS) ice sheets that had advanced onto the shelf during the sea-level low- stand of the Last Glacial Maximum (LGM; c. 19–23 ka BP). Overall, our results demonstrate that it is possible to establish an age model and reconstruct palaeoceanographical and climatic changes at high temporal resolution from sedimentary sequences recovered at 2300 m water depth from a West Antarctic drift. Book Part Antarc* Antarctic Antarctic Peninsula Dronning Maud Land EPICA ice core Iceberg* Planktonic foraminifera University of Cambridge, Department of Earth Sciences: ESC Publications Antarctic The Antarctic Antarctic Peninsula Dronning Maud Land Geological Society, London, Special Publications 381 1 263 276 |
institution |
Open Polar |
collection |
University of Cambridge, Department of Earth Sciences: ESC Publications |
op_collection_id |
ftucambridgeesc |
language |
English |
topic |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
spellingShingle |
01 - Climate Change and Earth-Ocean Atmosphere Systems Vautravers, Maryline J. Hodell, David A. Channell, James E.T. Hillenbrand, Claus-Dieter Hall, Mike A. Smith, James Larter, Robert D. Palaeoenvironmental records from the West Antarctic Peninsula drift sediments over the last 75 ka. |
topic_facet |
01 - Climate Change and Earth-Ocean Atmosphere Systems |
description |
We present results of a multi-proxy study on marine sediment core JR179-PC466 recovered from the crest of a sediment drift off the West Antarctic Peninsula at approximately 2300 m water depth. The 10.45 m-long core consists dominantly of glaciomarine terrigenous sedi- ments, with only traces of calcium carbonate (,1 wt%). Despite the very low abundance of calcar- eous foraminifera, planktonic shell numbers are sufficient for stable isotope analyses in two-thirds of the samples studied. The core chronology is based on oxygen isotope stratigraphy and corre- lation of its relative palaeomagnetic intensity (RPI) with a stacked reference curve. According to the age model, core PC466 spans the last 75 ka, with average sedimentation rates of between about 4 and 25 cm ka 21 . Planktonic foraminifera abundances fluctuate between 0 and 30 individ- uals per gram throughout the core, with minima observed during Marine Isotope Stage (MIS) 2 (14–29 ka before present, BP) and MIS4 (57–71 ka BP). Planktonic foraminifera are present in the Holocene but more abundant in sediments deposited during MIS3 (29–57 ka BP), owing to less dilution by terrigenous detritus and/or better carbonate preservation. During MIS3, forami- nifera maxima correlate with Antarctic warming events as recorded in the d 18 O signal of the EPICA Dronning Maud Land (EDML) ice core. They indicate higher planktonic foraminifera production and better carbonate preservation west of the Antarctic Peninsula during that time. The abundance of ice-rafted detritus (IRD) in core PC466 increased during the last deglaciation between about 19 and 11 ka BP, when numerous icebergs drifted across the core site, thereby releasing IRD. During this time, sea-level rise destabilized the Antarctic Peninsula (APIS) and West Antarctic (WAIS) ice sheets that had advanced onto the shelf during the sea-level low- stand of the Last Glacial Maximum (LGM; c. 19–23 ka BP). Overall, our results demonstrate that it is possible to establish an age model and reconstruct palaeoceanographical and climatic changes at high temporal resolution from sedimentary sequences recovered at 2300 m water depth from a West Antarctic drift. |
format |
Book Part |
author |
Vautravers, Maryline J. Hodell, David A. Channell, James E.T. Hillenbrand, Claus-Dieter Hall, Mike A. Smith, James Larter, Robert D. |
author_facet |
Vautravers, Maryline J. Hodell, David A. Channell, James E.T. Hillenbrand, Claus-Dieter Hall, Mike A. Smith, James Larter, Robert D. |
author_sort |
Vautravers, Maryline J. |
title |
Palaeoenvironmental records from the West Antarctic Peninsula drift sediments over the last 75 ka. |
title_short |
Palaeoenvironmental records from the West Antarctic Peninsula drift sediments over the last 75 ka. |
title_full |
Palaeoenvironmental records from the West Antarctic Peninsula drift sediments over the last 75 ka. |
title_fullStr |
Palaeoenvironmental records from the West Antarctic Peninsula drift sediments over the last 75 ka. |
title_full_unstemmed |
Palaeoenvironmental records from the West Antarctic Peninsula drift sediments over the last 75 ka. |
title_sort |
palaeoenvironmental records from the west antarctic peninsula drift sediments over the last 75 ka. |
publisher |
Geological Society of London |
publishDate |
2012 |
url |
http://eprints.esc.cam.ac.uk/2606/ http://eprints.esc.cam.ac.uk/2606/1/Geological_Society,_London,_Special_Publications-2013-Vautravers-SP381.12-1.pdf http://eprints.esc.cam.ac.uk/2606/2/vautravers.png https://doi.org/10.1144/SP381.12 |
geographic |
Antarctic The Antarctic Antarctic Peninsula Dronning Maud Land |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Dronning Maud Land |
genre |
Antarc* Antarctic Antarctic Peninsula Dronning Maud Land EPICA ice core Iceberg* Planktonic foraminifera |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Dronning Maud Land EPICA ice core Iceberg* Planktonic foraminifera |
op_relation |
http://eprints.esc.cam.ac.uk/2606/1/Geological_Society,_London,_Special_Publications-2013-Vautravers-SP381.12-1.pdf http://eprints.esc.cam.ac.uk/2606/2/vautravers.png Vautravers, Maryline J. and Hodell, David A. and Channell, James E.T. and Hillenbrand, Claus-Dieter and Hall, Mike A. and Smith, James and Larter, Robert D. (2012) Palaeoenvironmental records from the West Antarctic Peninsula drift sediments over the last 75 ka. In: Antarctic Palaeoenvironments and Earth-Surface Processes. Geological Society Special Publication, 381 . Geological Society of London. |
op_doi |
https://doi.org/10.1144/SP381.12 |
container_title |
Geological Society, London, Special Publications |
container_volume |
381 |
container_issue |
1 |
container_start_page |
263 |
op_container_end_page |
276 |
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1766262565933940736 |