Late Holocene climate change recorded in proxy records from a Bransfield Basin sediment core, Antarctic Peninsula
The 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 focu...
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Norwegian Polar Institute
2014
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Online Access: | https://doi.org/10.3402/polar.v33.17236 https://doaj.org/article/7afe35cd4b004349aedfeb08af36d8b4 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:7afe35cd4b004349aedfeb08af36d8b4 2023-05-15T14:02:15+02:00 Late Holocene climate change recorded in proxy records from a Bransfield Basin sediment core, Antarctic Peninsula Alex Barnard Julia S. Wellner John B. Anderson 2014-06-01 https://doi.org/10.3402/polar.v33.17236 https://doaj.org/article/7afe35cd4b004349aedfeb08af36d8b4 en eng Norwegian Polar Institute 1751-8369 doi:10.3402/polar.v33.17236 https://doaj.org/article/7afe35cd4b004349aedfeb08af36d8b4 undefined Polar Research, Vol 33, Iss 0, Pp 1-13 (2014) Antarctic Peninsula palaeoclimate Holocene marine isotopes geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2014 fttriple https://doi.org/10.3402/polar.v33.17236 2023-01-22T19:28:13Z The 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. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Bransfield Strait Polar Research Sea ice Unknown Antarctic The Antarctic Antarctic Peninsula Bransfield Strait Polar Research 33 1 17236 |
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English |
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Antarctic Peninsula palaeoclimate Holocene marine isotopes geo |
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Antarctic Peninsula palaeoclimate Holocene marine isotopes geo Alex Barnard Julia S. Wellner John B. Anderson Late Holocene climate change recorded in proxy records from a Bransfield Basin sediment core, Antarctic Peninsula |
topic_facet |
Antarctic Peninsula palaeoclimate Holocene marine isotopes geo |
description |
The 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. |
format |
Article in Journal/Newspaper |
author |
Alex Barnard Julia S. Wellner John B. Anderson |
author_facet |
Alex Barnard Julia S. Wellner John B. Anderson |
author_sort |
Alex Barnard |
title |
Late Holocene climate change recorded in proxy records from a Bransfield Basin sediment core, Antarctic Peninsula |
title_short |
Late Holocene climate change recorded in proxy records from a Bransfield Basin sediment core, Antarctic Peninsula |
title_full |
Late Holocene climate change recorded in proxy records from a Bransfield Basin sediment core, Antarctic Peninsula |
title_fullStr |
Late Holocene climate change recorded in proxy records from a Bransfield Basin sediment core, Antarctic Peninsula |
title_full_unstemmed |
Late Holocene climate change recorded in proxy records from a Bransfield Basin sediment core, Antarctic Peninsula |
title_sort |
late holocene climate change recorded in proxy records from a bransfield basin sediment core, antarctic peninsula |
publisher |
Norwegian Polar Institute |
publishDate |
2014 |
url |
https://doi.org/10.3402/polar.v33.17236 https://doaj.org/article/7afe35cd4b004349aedfeb08af36d8b4 |
geographic |
Antarctic The Antarctic Antarctic Peninsula Bransfield Strait |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Bransfield Strait |
genre |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait Polar Research Sea ice |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Bransfield Strait Polar Research Sea ice |
op_source |
Polar Research, Vol 33, Iss 0, Pp 1-13 (2014) |
op_relation |
1751-8369 doi:10.3402/polar.v33.17236 https://doaj.org/article/7afe35cd4b004349aedfeb08af36d8b4 |
op_rights |
undefined |
op_doi |
https://doi.org/10.3402/polar.v33.17236 |
container_title |
Polar Research |
container_volume |
33 |
container_issue |
1 |
container_start_page |
17236 |
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1766272410716209152 |