(Table S1) Radiocarbon data of sediment core SO161/5 22SL, supplement to: De Pol-Holz, Ricardo; Keigwin, Lloyd D; Southon, John R; Hebbeln, Dierk; Mohtadi, Mahyar (2010): No signature of abyssal carbon in intermediate waters off Chile during deglaciaition. Nature Geoscience, 3(3), 192-195
At the end of the Last Glacial Maximum (19,000 to 11,000 years ago), atmospheric carbon dioxide concentrations rose while the Delta14C of atmospheric carbon dioxide declined**1, 2. These changes have been attributed to an injection of carbon dioxide with low radiocarbon activity from an oceanic abys...
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ftdatacite:10.1594/pangaea.735788 2023-05-15T13:47:34+02:00 (Table S1) Radiocarbon data of sediment core SO161/5 22SL, supplement to: De Pol-Holz, Ricardo; Keigwin, Lloyd D; Southon, John R; Hebbeln, Dierk; Mohtadi, Mahyar (2010): No signature of abyssal carbon in intermediate waters off Chile during deglaciaition. Nature Geoscience, 3(3), 192-195 De Pol-Holz, Ricardo Keigwin, Lloyd D Southon, John R Hebbeln, Dierk Mohtadi, Mahyar 2010 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.735788 https://doi.pangaea.de/10.1594/PANGAEA.735788 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1038/ngeo745 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY DEPTH, sediment/rock Sample code/label Taxon/taxa Age, dated Age, dated standard deviation Calendar age Calendar age, standard deviation Δ14C Gravity corer Kiel type Age, 14C AMS SO161/5 Sonne Center for Marine Environmental Sciences MARUM Supplementary Dataset dataset Dataset 2010 ftdatacite https://doi.org/10.1594/pangaea.735788 https://doi.org/10.1038/ngeo745 2022-02-08T16:24:46Z At the end of the Last Glacial Maximum (19,000 to 11,000 years ago), atmospheric carbon dioxide concentrations rose while the Delta14C of atmospheric carbon dioxide declined**1, 2. These changes have been attributed to an injection of carbon dioxide with low radiocarbon activity from an oceanic abyssal reservoir that was isolated from the atmosphere for several thousand years before deglaciation**3. The current understanding points to the Southern Ocean as the main area of exchange between these reservoirs4. Intermediate water formed in the Southern Ocean surrounding Antarctica would have then carried the old carbon dioxide signature to the lower-latitude oceans**5, 6. Here we reconstruct the Delta14C signature of Antarctic Intermediate Water off the coast of Chile for the past 20,000 years, using paired 14C ages of benthic and planktonic foraminifera. In contrast to the above scenario, we find that the delta14C signature of the Antarctic Intermediate Water closely matches the modelled surface ocean Delta14C, precluding the influence of an old carbon source. We suggest that if the abyssal ocean is indeed the source of the radiocarbon-depleted carbon dioxide, an alternative path for the mixing and propagation of its carbon dioxide may be required to explain the observed changes in atmospheric carbon dioxide concentration and radiocarbon activity. : UCIAMS-64329: The large error in this measurement is due to the very small sample size (15 µg C) Dataset Antarc* Antarctic Antarctica Planktonic foraminifera Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Antarctic Ricardo ENVELOPE(-63.033,-63.033,-64.867,-64.867) Southern Ocean The Antarctic |
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Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
DEPTH, sediment/rock Sample code/label Taxon/taxa Age, dated Age, dated standard deviation Calendar age Calendar age, standard deviation Δ14C Gravity corer Kiel type Age, 14C AMS SO161/5 Sonne Center for Marine Environmental Sciences MARUM |
spellingShingle |
DEPTH, sediment/rock Sample code/label Taxon/taxa Age, dated Age, dated standard deviation Calendar age Calendar age, standard deviation Δ14C Gravity corer Kiel type Age, 14C AMS SO161/5 Sonne Center for Marine Environmental Sciences MARUM De Pol-Holz, Ricardo Keigwin, Lloyd D Southon, John R Hebbeln, Dierk Mohtadi, Mahyar (Table S1) Radiocarbon data of sediment core SO161/5 22SL, supplement to: De Pol-Holz, Ricardo; Keigwin, Lloyd D; Southon, John R; Hebbeln, Dierk; Mohtadi, Mahyar (2010): No signature of abyssal carbon in intermediate waters off Chile during deglaciaition. Nature Geoscience, 3(3), 192-195 |
topic_facet |
DEPTH, sediment/rock Sample code/label Taxon/taxa Age, dated Age, dated standard deviation Calendar age Calendar age, standard deviation Δ14C Gravity corer Kiel type Age, 14C AMS SO161/5 Sonne Center for Marine Environmental Sciences MARUM |
description |
At the end of the Last Glacial Maximum (19,000 to 11,000 years ago), atmospheric carbon dioxide concentrations rose while the Delta14C of atmospheric carbon dioxide declined**1, 2. These changes have been attributed to an injection of carbon dioxide with low radiocarbon activity from an oceanic abyssal reservoir that was isolated from the atmosphere for several thousand years before deglaciation**3. The current understanding points to the Southern Ocean as the main area of exchange between these reservoirs4. Intermediate water formed in the Southern Ocean surrounding Antarctica would have then carried the old carbon dioxide signature to the lower-latitude oceans**5, 6. Here we reconstruct the Delta14C signature of Antarctic Intermediate Water off the coast of Chile for the past 20,000 years, using paired 14C ages of benthic and planktonic foraminifera. In contrast to the above scenario, we find that the delta14C signature of the Antarctic Intermediate Water closely matches the modelled surface ocean Delta14C, precluding the influence of an old carbon source. We suggest that if the abyssal ocean is indeed the source of the radiocarbon-depleted carbon dioxide, an alternative path for the mixing and propagation of its carbon dioxide may be required to explain the observed changes in atmospheric carbon dioxide concentration and radiocarbon activity. : UCIAMS-64329: The large error in this measurement is due to the very small sample size (15 µg C) |
format |
Dataset |
author |
De Pol-Holz, Ricardo Keigwin, Lloyd D Southon, John R Hebbeln, Dierk Mohtadi, Mahyar |
author_facet |
De Pol-Holz, Ricardo Keigwin, Lloyd D Southon, John R Hebbeln, Dierk Mohtadi, Mahyar |
author_sort |
De Pol-Holz, Ricardo |
title |
(Table S1) Radiocarbon data of sediment core SO161/5 22SL, supplement to: De Pol-Holz, Ricardo; Keigwin, Lloyd D; Southon, John R; Hebbeln, Dierk; Mohtadi, Mahyar (2010): No signature of abyssal carbon in intermediate waters off Chile during deglaciaition. Nature Geoscience, 3(3), 192-195 |
title_short |
(Table S1) Radiocarbon data of sediment core SO161/5 22SL, supplement to: De Pol-Holz, Ricardo; Keigwin, Lloyd D; Southon, John R; Hebbeln, Dierk; Mohtadi, Mahyar (2010): No signature of abyssal carbon in intermediate waters off Chile during deglaciaition. Nature Geoscience, 3(3), 192-195 |
title_full |
(Table S1) Radiocarbon data of sediment core SO161/5 22SL, supplement to: De Pol-Holz, Ricardo; Keigwin, Lloyd D; Southon, John R; Hebbeln, Dierk; Mohtadi, Mahyar (2010): No signature of abyssal carbon in intermediate waters off Chile during deglaciaition. Nature Geoscience, 3(3), 192-195 |
title_fullStr |
(Table S1) Radiocarbon data of sediment core SO161/5 22SL, supplement to: De Pol-Holz, Ricardo; Keigwin, Lloyd D; Southon, John R; Hebbeln, Dierk; Mohtadi, Mahyar (2010): No signature of abyssal carbon in intermediate waters off Chile during deglaciaition. Nature Geoscience, 3(3), 192-195 |
title_full_unstemmed |
(Table S1) Radiocarbon data of sediment core SO161/5 22SL, supplement to: De Pol-Holz, Ricardo; Keigwin, Lloyd D; Southon, John R; Hebbeln, Dierk; Mohtadi, Mahyar (2010): No signature of abyssal carbon in intermediate waters off Chile during deglaciaition. Nature Geoscience, 3(3), 192-195 |
title_sort |
(table s1) radiocarbon data of sediment core so161/5 22sl, supplement to: de pol-holz, ricardo; keigwin, lloyd d; southon, john r; hebbeln, dierk; mohtadi, mahyar (2010): no signature of abyssal carbon in intermediate waters off chile during deglaciaition. nature geoscience, 3(3), 192-195 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2010 |
url |
https://dx.doi.org/10.1594/pangaea.735788 https://doi.pangaea.de/10.1594/PANGAEA.735788 |
long_lat |
ENVELOPE(-63.033,-63.033,-64.867,-64.867) |
geographic |
Antarctic Ricardo Southern Ocean The Antarctic |
geographic_facet |
Antarctic Ricardo Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Planktonic foraminifera Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Planktonic foraminifera Southern Ocean |
op_relation |
https://dx.doi.org/10.1038/ngeo745 |
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.735788 https://doi.org/10.1038/ngeo745 |
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1766247314617270272 |