Late Pleistocene oxygen isotope record of biognic silica, supplement to: Shemesh, Aldo; Burckle, Lloyd H; Hays, James D (1995): Late Pleistocene oxygen isotope records of biogenic silica from the Atlantic sector of the Southern Ocean. Paleoceanography, 10(2), 179-196
We determined the isotopic composition of oxygen in marine diatoms in eight deep-sea cores recovered from the Atlantic sector of the Southern Ocean. The analytical reproducibility and core-to-core consistency of the isotopic signal suggests that diatom delta18O can be used as a new paleocenographic...
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ftdatacite:10.1594/pangaea.729945 2023-05-15T14:05:24+02:00 Late Pleistocene oxygen isotope record of biognic silica, supplement to: Shemesh, Aldo; Burckle, Lloyd H; Hays, James D (1995): Late Pleistocene oxygen isotope records of biogenic silica from the Atlantic sector of the Southern Ocean. Paleoceanography, 10(2), 179-196 Shemesh, Aldo Burckle, Lloyd H Hays, James D 1995 application/zip https://dx.doi.org/10.1594/pangaea.729945 https://doi.pangaea.de/10.1594/PANGAEA.729945 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1029/94pa03060 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Piston corer RC11 RC13 Robert Conrad Lamont-Doherty Earth Observatory, Columbia University LDEO article Supplementary Collection of Datasets Collection 1995 ftdatacite https://doi.org/10.1594/pangaea.729945 https://doi.org/10.1029/94pa03060 2022-02-09T13:17:17Z We determined the isotopic composition of oxygen in marine diatoms in eight deep-sea cores recovered from the Atlantic sector of the Southern Ocean. The analytical reproducibility and core-to-core consistency of the isotopic signal suggests that diatom delta18O can be used as a new paleocenographic tool to reconstruct past variations in surface water characteristics and to generate 18O -isotope-based stratigraphy for the Southern Ocean. The data indicate that diatom delta18O reflects sea surface temperature and seawater isotopic composition and that diatoms retain their isotopic signal on timescales of a least 430 ka. The delta18O analyses of different diatom assemblages reveal that the isotopic signal is free of species effects and that the common Antarctic species have the same water-opal fractionation. The transition from the last glacial maximum (LGM) to the Holocene is fully recorded in high sedimentation rate cores. An 18O enrichment during the LGM, a post-LGM meltwater spike and an input of meltwater during the late Holocene are the main isotopic features observed in down core records. The origin of this meltwater was very likely melting icebergs and/or continental ice or by melting sea ice that had accumulated snow. The most pronounced meltwater effects are recorded in cores that are associated with the Weddel gyre. Our results provide the basis for extending isotope studies to oceanic regions devoid of carbonate; further, isotopic stratigraphies may be constructed for records and regions where they were previously not possible. Article in Journal/Newspaper Antarc* Antarctic Iceberg* Sea ice Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Antarctic Southern Ocean |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Piston corer RC11 RC13 Robert Conrad Lamont-Doherty Earth Observatory, Columbia University LDEO |
spellingShingle |
Piston corer RC11 RC13 Robert Conrad Lamont-Doherty Earth Observatory, Columbia University LDEO Shemesh, Aldo Burckle, Lloyd H Hays, James D Late Pleistocene oxygen isotope record of biognic silica, supplement to: Shemesh, Aldo; Burckle, Lloyd H; Hays, James D (1995): Late Pleistocene oxygen isotope records of biogenic silica from the Atlantic sector of the Southern Ocean. Paleoceanography, 10(2), 179-196 |
topic_facet |
Piston corer RC11 RC13 Robert Conrad Lamont-Doherty Earth Observatory, Columbia University LDEO |
description |
We determined the isotopic composition of oxygen in marine diatoms in eight deep-sea cores recovered from the Atlantic sector of the Southern Ocean. The analytical reproducibility and core-to-core consistency of the isotopic signal suggests that diatom delta18O can be used as a new paleocenographic tool to reconstruct past variations in surface water characteristics and to generate 18O -isotope-based stratigraphy for the Southern Ocean. The data indicate that diatom delta18O reflects sea surface temperature and seawater isotopic composition and that diatoms retain their isotopic signal on timescales of a least 430 ka. The delta18O analyses of different diatom assemblages reveal that the isotopic signal is free of species effects and that the common Antarctic species have the same water-opal fractionation. The transition from the last glacial maximum (LGM) to the Holocene is fully recorded in high sedimentation rate cores. An 18O enrichment during the LGM, a post-LGM meltwater spike and an input of meltwater during the late Holocene are the main isotopic features observed in down core records. The origin of this meltwater was very likely melting icebergs and/or continental ice or by melting sea ice that had accumulated snow. The most pronounced meltwater effects are recorded in cores that are associated with the Weddel gyre. Our results provide the basis for extending isotope studies to oceanic regions devoid of carbonate; further, isotopic stratigraphies may be constructed for records and regions where they were previously not possible. |
format |
Article in Journal/Newspaper |
author |
Shemesh, Aldo Burckle, Lloyd H Hays, James D |
author_facet |
Shemesh, Aldo Burckle, Lloyd H Hays, James D |
author_sort |
Shemesh, Aldo |
title |
Late Pleistocene oxygen isotope record of biognic silica, supplement to: Shemesh, Aldo; Burckle, Lloyd H; Hays, James D (1995): Late Pleistocene oxygen isotope records of biogenic silica from the Atlantic sector of the Southern Ocean. Paleoceanography, 10(2), 179-196 |
title_short |
Late Pleistocene oxygen isotope record of biognic silica, supplement to: Shemesh, Aldo; Burckle, Lloyd H; Hays, James D (1995): Late Pleistocene oxygen isotope records of biogenic silica from the Atlantic sector of the Southern Ocean. Paleoceanography, 10(2), 179-196 |
title_full |
Late Pleistocene oxygen isotope record of biognic silica, supplement to: Shemesh, Aldo; Burckle, Lloyd H; Hays, James D (1995): Late Pleistocene oxygen isotope records of biogenic silica from the Atlantic sector of the Southern Ocean. Paleoceanography, 10(2), 179-196 |
title_fullStr |
Late Pleistocene oxygen isotope record of biognic silica, supplement to: Shemesh, Aldo; Burckle, Lloyd H; Hays, James D (1995): Late Pleistocene oxygen isotope records of biogenic silica from the Atlantic sector of the Southern Ocean. Paleoceanography, 10(2), 179-196 |
title_full_unstemmed |
Late Pleistocene oxygen isotope record of biognic silica, supplement to: Shemesh, Aldo; Burckle, Lloyd H; Hays, James D (1995): Late Pleistocene oxygen isotope records of biogenic silica from the Atlantic sector of the Southern Ocean. Paleoceanography, 10(2), 179-196 |
title_sort |
late pleistocene oxygen isotope record of biognic silica, supplement to: shemesh, aldo; burckle, lloyd h; hays, james d (1995): late pleistocene oxygen isotope records of biogenic silica from the atlantic sector of the southern ocean. paleoceanography, 10(2), 179-196 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1995 |
url |
https://dx.doi.org/10.1594/pangaea.729945 https://doi.pangaea.de/10.1594/PANGAEA.729945 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Iceberg* Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Iceberg* Sea ice Southern Ocean |
op_relation |
https://dx.doi.org/10.1029/94pa03060 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.729945 https://doi.org/10.1029/94pa03060 |
_version_ |
1766277258179248128 |