Water chemistry and sediment age of lake Terrasovoje, Amery Oasis, East Antarctica
The late Quaternary palaeoenvironmental history of the southern Windmill Islands, East Antarctica, has been reconstructed using diatom assemblages from two long, well-dated sediment cores taken in two marine bays. The diatom assemblage of the lowest sediment layers suggests a warm climate with mostl...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.847398 2023-05-15T13:44:47+02:00 Water chemistry and sediment age of lake Terrasovoje, Amery Oasis, East Antarctica Wagner, Bernd Cremer, Holger Hultzsch, Nadja Gore, Damian B Melles, Martin LATITUDE: -70.555400 * LONGITUDE: 68.025660 * DATE/TIME START: 2001-12-29T00:00:00 * DATE/TIME END: 2001-12-31T00:00:00 2007-06-23 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.847398 https://doi.org/10.1594/PANGAEA.847398 en eng PANGAEA Hultzsch, Nadja (2007): Lakustrine Sedimente als Archive des spätquartären Umweltwandels in der Amery-Oase, Ostantarktis (The Late Quaternary climatic and environmental history of Amery Oasis, East Antarctica). Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 545, 168 pp, https://doi.org/10.2312/BzPM_0545_2007 Wagner, Bernd (2003): The Expeditions Amery Oasis, East Antarctica, in 2001/02 and Taylor Valley, Southern Victoria Land, in 2002. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 460, 69 pp, https://doi.org/10.2312/BzPM_0460_2003 https://doi.pangaea.de/10.1594/PANGAEA.847398 https://doi.org/10.1594/PANGAEA.847398 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Wagner, Bernd; Cremer, Holger; Hultzsch, Nadja; Gore, Damian B; Melles, Martin (2004): Late Pleistocene and Holocene history of Lake Terrasovoje, Amery Oasis, East Antarctica, and its climatic and environmental implications. Journal of Paleolimnology, 32(4), 321-339, https://doi.org/10.1007/s10933-004-0143-8 Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 Dataset 2007 ftpangaea https://doi.org/10.1594/PANGAEA.847398 https://doi.org/10.1007/s10933-004-0143-8 https://doi.org/10.2312/BzPM_0545_2007 https://doi.org/10.2312/BzPM_0460_2003 2023-01-20T07:33:28Z The late Quaternary palaeoenvironmental history of the southern Windmill Islands, East Antarctica, has been reconstructed using diatom assemblages from two long, well-dated sediment cores taken in two marine bays. The diatom assemblage of the lowest sediment layers suggests a warm climate with mostly open water conditions during the late Pleistocene. During the following glacial, the Windmill Islands were covered by grounded ice preventing any in situ bioproductivity. Following deglaciation, a sapropel with a well-preserved diatom assemblage was deposited from ~10 500 cal yr BP. Between ~10 500 and ~4000 cal yr BP, total organic carbon (Corg) and total diatom valve concentrations as well as the diatom species composition suggest relatively cool summer temperatures. Hydrological conditions in coastal bays were characterised by combined winter sea-ice and open water conditions. This extensive period of glacial retreat was followed by the Holocene optimum (~4000 to ~1000 cal yr BP), which occurred later in the southern Windmill Islands than in most other Antarctic coastal regions. Diatom assemblages in this period suggest ice-free conditions and meltwater-stratified waters in the marine bays during summer, which is also reflected in high proportions of freshwater diatoms in the sediments. The diatom assemblage in the upper sediments of both cores indicates Neoglacial cooling from ~1000 cal yr BP, which again led to seasonally persistent sea-ice on the bays. The Holocene optimum and cooling trends in the Windmill Islands did not occur contemporaneously with other Antarctic coastal regions, showing that the here presented record reflects partly local environmental conditions rather than global climatic trends. Dataset Antarc* Antarctic Antarctica Arctic Berichte zur Polar- und Meeresforschung East Antarctica Reports on Polar and Marine Research Sea ice Windmill Islands PANGAEA - Data Publisher for Earth & Environmental Science Arctic Antarctic East Antarctica Amery ENVELOPE(-94.063,-94.063,56.565,56.565) Windmill Islands ENVELOPE(110.417,110.417,-66.350,-66.350) ENVELOPE(68.025660,68.025660,-70.555400,-70.555400) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 |
spellingShingle |
Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 Wagner, Bernd Cremer, Holger Hultzsch, Nadja Gore, Damian B Melles, Martin Water chemistry and sediment age of lake Terrasovoje, Amery Oasis, East Antarctica |
topic_facet |
Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158 |
description |
The late Quaternary palaeoenvironmental history of the southern Windmill Islands, East Antarctica, has been reconstructed using diatom assemblages from two long, well-dated sediment cores taken in two marine bays. The diatom assemblage of the lowest sediment layers suggests a warm climate with mostly open water conditions during the late Pleistocene. During the following glacial, the Windmill Islands were covered by grounded ice preventing any in situ bioproductivity. Following deglaciation, a sapropel with a well-preserved diatom assemblage was deposited from ~10 500 cal yr BP. Between ~10 500 and ~4000 cal yr BP, total organic carbon (Corg) and total diatom valve concentrations as well as the diatom species composition suggest relatively cool summer temperatures. Hydrological conditions in coastal bays were characterised by combined winter sea-ice and open water conditions. This extensive period of glacial retreat was followed by the Holocene optimum (~4000 to ~1000 cal yr BP), which occurred later in the southern Windmill Islands than in most other Antarctic coastal regions. Diatom assemblages in this period suggest ice-free conditions and meltwater-stratified waters in the marine bays during summer, which is also reflected in high proportions of freshwater diatoms in the sediments. The diatom assemblage in the upper sediments of both cores indicates Neoglacial cooling from ~1000 cal yr BP, which again led to seasonally persistent sea-ice on the bays. The Holocene optimum and cooling trends in the Windmill Islands did not occur contemporaneously with other Antarctic coastal regions, showing that the here presented record reflects partly local environmental conditions rather than global climatic trends. |
format |
Dataset |
author |
Wagner, Bernd Cremer, Holger Hultzsch, Nadja Gore, Damian B Melles, Martin |
author_facet |
Wagner, Bernd Cremer, Holger Hultzsch, Nadja Gore, Damian B Melles, Martin |
author_sort |
Wagner, Bernd |
title |
Water chemistry and sediment age of lake Terrasovoje, Amery Oasis, East Antarctica |
title_short |
Water chemistry and sediment age of lake Terrasovoje, Amery Oasis, East Antarctica |
title_full |
Water chemistry and sediment age of lake Terrasovoje, Amery Oasis, East Antarctica |
title_fullStr |
Water chemistry and sediment age of lake Terrasovoje, Amery Oasis, East Antarctica |
title_full_unstemmed |
Water chemistry and sediment age of lake Terrasovoje, Amery Oasis, East Antarctica |
title_sort |
water chemistry and sediment age of lake terrasovoje, amery oasis, east antarctica |
publisher |
PANGAEA |
publishDate |
2007 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.847398 https://doi.org/10.1594/PANGAEA.847398 |
op_coverage |
LATITUDE: -70.555400 * LONGITUDE: 68.025660 * DATE/TIME START: 2001-12-29T00:00:00 * DATE/TIME END: 2001-12-31T00:00:00 |
long_lat |
ENVELOPE(-94.063,-94.063,56.565,56.565) ENVELOPE(110.417,110.417,-66.350,-66.350) ENVELOPE(68.025660,68.025660,-70.555400,-70.555400) |
geographic |
Arctic Antarctic East Antarctica Amery Windmill Islands |
geographic_facet |
Arctic Antarctic East Antarctica Amery Windmill Islands |
genre |
Antarc* Antarctic Antarctica Arctic Berichte zur Polar- und Meeresforschung East Antarctica Reports on Polar and Marine Research Sea ice Windmill Islands |
genre_facet |
Antarc* Antarctic Antarctica Arctic Berichte zur Polar- und Meeresforschung East Antarctica Reports on Polar and Marine Research Sea ice Windmill Islands |
op_source |
Supplement to: Wagner, Bernd; Cremer, Holger; Hultzsch, Nadja; Gore, Damian B; Melles, Martin (2004): Late Pleistocene and Holocene history of Lake Terrasovoje, Amery Oasis, East Antarctica, and its climatic and environmental implications. Journal of Paleolimnology, 32(4), 321-339, https://doi.org/10.1007/s10933-004-0143-8 |
op_relation |
Hultzsch, Nadja (2007): Lakustrine Sedimente als Archive des spätquartären Umweltwandels in der Amery-Oase, Ostantarktis (The Late Quaternary climatic and environmental history of Amery Oasis, East Antarctica). Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 545, 168 pp, https://doi.org/10.2312/BzPM_0545_2007 Wagner, Bernd (2003): The Expeditions Amery Oasis, East Antarctica, in 2001/02 and Taylor Valley, Southern Victoria Land, in 2002. Berichte zur Polar- und Meeresforschung = Reports on Polar and Marine Research, 460, 69 pp, https://doi.org/10.2312/BzPM_0460_2003 https://doi.pangaea.de/10.1594/PANGAEA.847398 https://doi.org/10.1594/PANGAEA.847398 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.847398 https://doi.org/10.1007/s10933-004-0143-8 https://doi.org/10.2312/BzPM_0545_2007 https://doi.org/10.2312/BzPM_0460_2003 |
_version_ |
1766206260109115392 |