Late Holocene climate change recorded in proxy records from a Bransfield Basin sediment core, Antarctic Peninsula

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dc.citation.firstpage17236en_US
dc.citation.journalTitlePolar Researchen_US
dc.citation.volumeNumber33en_US
dc.contributor.authorBarnard, Alexen_US
dc.contributor.authorWellner, Julia S.en_US
dc.contributor.authorAnderson, John B.en_US
dc.date.accessioned2016-01-28T22:50:35Zen_US
dc.date.available2016-01-28T22:50:35Zen_US
dc.date.issued2014en_US
dc.description.abstractThe glacimarine environment of the Antarctic Peninsula region is one of the fastest warming places on Earth today, but details of changes in the recent past remain unknown. Large distances and widespread variability separate late Holocene palaeoclimate reconstructions in this region. This study focuses on a marine sediment core collected from ca. 2000 m below sea level in the Central Bransfield Strait that serves as a key for understanding changes in this region. The core yielded a high sedimentation rate and therefore provides an exceptional high-resolution sedimentary record composed of hemipelagic sediment, with some turbidites. An age model has been created using radiocarbon dates that span the Late Holocene: 3560 cal yr BP to present. This chronostratigraphic framework was used to establish five units, which are grouped into two super-units: a lower super-unit (3560–1600 cal yr BP) and an upper super-unit (1600 cal yr BP–present), based on facies descriptions, laser particle size analysis, x-ray analysis, multi-sensor core logger data, weight percentages and isotopic values of total organic carbon and nitrogen. We interpret the signal contained within the upper super-unit as an increase in surface water irradiance and/or shortening of the sea-ice season and the five units are broadly synchronous with climatic intervals across the Antarctic Peninsula region. While the general trends of regional climatic periods are represented in the Bransfield Basin core we have examined, each additional record that is obtained adds variability to the known history of the Antarctic Peninsula, rather than clarifying specific trends.en_US
dc.identifier.citationBarnard, Alex, Wellner, Julia S. and Anderson, John B.. "Late Holocene climate change recorded in proxy records from a Bransfield Basin sediment core, Antarctic Peninsula." <i>Polar Research,</i> 33, (2014) Co-Action Publishing: 17236. http://dx.doi.org/10.3402/polar.v33.17236.en_US
dc.identifier.doihttp://dx.doi.org/10.3402/polar.v33.17236en_US
dc.identifier.urihttps://hdl.handle.net/1911/88246en_US
dc.language.isoengen_US
dc.publisherCo-Action Publishingen_US
dc.rightsThis is an Open Access article distributed under the terms of the Creative Commons Attribution-Noncommercial 3.0 Unported License, permitting all non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.en_US
dc.rights.urihttp://creativecommons.org/licenses/by-nc/3.0/en_US
dc.subject.keywordAntarctic Peninsulaen_US
dc.subject.keywordpalaeoclimateen_US
dc.subject.keywordHoloceneen_US
dc.subject.keywordmarineen_US
dc.subject.keywordisotopesen_US
dc.titleLate Holocene climate change recorded in proxy records from a Bransfield Basin sediment core, Antarctic Peninsulaen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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