Reconstruction of changes in the Weddell Sea sector of the Antarctic Ice Sheet since the Last Glacial Maximum

Simple item page
dc.citation.firstpage111en_US
dc.citation.journalTitleQuaternary Science Reviewsen_US
dc.citation.lastpage136en_US
dc.citation.volumeNumber100en_US
dc.contributor.authorHillenbrand, Claus-Dieteren_US
dc.contributor.authorBentley, Michael J.en_US
dc.contributor.authorStolldorf, Travis D.en_US
dc.contributor.authorHein, Andrew S.en_US
dc.contributor.authorKuhn, Gerharden_US
dc.contributor.authorGraham, Alastair G.C.en_US
dc.contributor.authorFogwill, Christopher J.en_US
dc.contributor.authorKristoffersen, Yngveen_US
dc.contributor.authorSmith, James A.en_US
dc.contributor.authorAnderson, John B.en_US
dc.contributor.authorLarter, Robert D.en_US
dc.contributor.authorMelles, Martinen_US
dc.contributor.authorHodgson, Domen_US
dc.date.accessioned2016-01-28T22:50:35Zen_US
dc.date.available2016-01-28T22:50:35Zen_US
dc.date.issued2014en_US
dc.description.abstractThe Weddell Sea sector is one of the main formation sites for Antarctic Bottom Water and an outlet for about one fifth of Antarctica's continental ice volume. Over the last few decades, studies on glacial–geological records in this sector have provided conflicting reconstructions of changes in ice-sheet extent and ice-sheet thickness since the Last Glacial Maximum (LGM at ca 23–19 calibrated kiloyears before present, cal ka BP). Terrestrial geomorphological records and exposure ages obtained from rocks in the hinterland of the Weddell Sea, ice-sheet thickness constraints from ice cores and some radiocarbon dates on offshore sediments were interpreted to indicate no significant ice thickening and locally restricted grounding-line advance at the LGM. Other marine geological and geophysical studies concluded that subglacial bedforms mapped on the Weddell Sea continental shelf, subglacial deposits and sediments over-compacted by overriding ice recovered in cores, and the few available radiocarbon ages from marine sediments are consistent with major ice-sheet advance at the LGM. Reflecting the geological interpretations, different ice-sheet models have reconstructed conflicting LGM ice-sheet configurations for the Weddell Sea sector. Consequently, the estimated contributions of ice-sheet build-up in the Weddell Sea sector to the LGM sea-level low-stand of ~130 m vary considerably. In this paper, we summarise and review the geological records of past ice-sheet margins and past ice-sheet elevations in the Weddell Sea sector. We compile marine and terrestrial chronological data constraining former ice-sheet size, thereby highlighting different levels of certainty, and present two alternative scenarios of the LGM ice-sheet configuration, including time-slice reconstructions for post-LGM grounding-line retreat. Moreover, we discuss consistencies and possible reasons for inconsistencies between the various reconstructions and propose objectives for future research. The aim of our study is to provide two alternative interpretations of glacial–geological datasets on Antarctic Ice-Sheet History for the Weddell Sea sector, which can be utilised to test and improve numerical ice-sheet models.en_US
dc.identifier.citationHillenbrand, Claus-Dieter, Bentley, Michael J., Stolldorf, Travis D., et al.. "Reconstruction of changes in the Weddell Sea sector of the Antarctic Ice Sheet since the Last Glacial Maximum." <i>Quaternary Science Reviews,</i> 100, (2014) Elsevier: 111-136. http://dx.doi.org/10.1016/j.quascirev.2013.07.020.en_US
dc.identifier.doihttp://dx.doi.org/10.1016/j.quascirev.2013.07.020en_US
dc.identifier.urihttps://hdl.handle.net/1911/88245en_US
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.rightsThis is an open access article under the CC BY license.en_US
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en_US
dc.subject.keywordAntarcticaen_US
dc.subject.keywordCosmogenic nuclide surface exposure age datingen_US
dc.subject.keywordDeglaciationen_US
dc.subject.keywordGeomorphologyen_US
dc.subject.keywordGlacial historyen_US
dc.subject.keywordIce sheeten_US
dc.subject.keywordIce Shelfen_US
dc.subject.keywordLast Glacial Maximumen_US
dc.subject.keywordRadiocarbon datingen_US
dc.subject.keywordSea levelen_US
dc.subject.keywordWeddell Seaen_US
dc.titleReconstruction of changes in the Weddell Sea sector of the Antarctic Ice Sheet since the Last Glacial Maximumen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
1-s2.0-S0277379113002850-main.pdf
Size:
6.57 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Faculty Publications
Earth, Environmental and Planetary Sciences Publications