(Table 1) Age determination of surface sediment samples from the North Atlantic ...
Most seafloor sediments are dated with radiocarbon, and the sediment is assumed to be zero-age (modern) when the signal of atmospheric testing of nuclear weapons is present (Fraction modern (Fm) > 1). Using a simple mass balance, we show that even with Fm > 1, half of the planktonic foraminife...
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ftdatacite:10.1594/pangaea.831644 2024-09-30T14:26:54+00:00 (Table 1) Age determination of surface sediment samples from the North Atlantic ... Keigwin, Lloyd D Guilderson, Thomas P 2009 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.831644 https://doi.pangaea.de/10.1594/PANGAEA.831644 en eng PANGAEA https://dx.doi.org/10.1029/2008pa001727 https://dx.doi.org/10.1126/science.286.5439.520 https://dx.doi.org/10.1126/science.1075287 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 Event label Latitude of event Longitude of event Elevation of event Laboratory code/label DEPTH, sediment/rock Age, dated material Fraction modern carbon Fraction modern carbon, error Age, dated Age, dated standard deviation Δ14C Reference/source MultiCorer Box corer Age, 14C AMS KNR178 Knorr Supplementary Dataset Dataset dataset 2009 ftdatacite https://doi.org/10.1594/pangaea.83164410.1029/2008pa00172710.1126/science.286.5439.52010.1126/science.1075287 2024-09-02T08:35:09Z Most seafloor sediments are dated with radiocarbon, and the sediment is assumed to be zero-age (modern) when the signal of atmospheric testing of nuclear weapons is present (Fraction modern (Fm) > 1). Using a simple mass balance, we show that even with Fm > 1, half of the planktonic foraminifera at the seafloor can be centuries old, because of bioturbation. This calculation, and data from four core sites in the western North Atlantic indicate that, first, during some part of the Little Ice Age (LIA) there may have been more Antarctic Bottom Water than today in the deep western North Atlantic. Alternatively, bioturbation may have introduced much older benthic foraminifera into surface sediments. Second, paleo-based warming of Sargasso Sea surface waters since the LIA must lag the actual warming because of bioturbation of older and colder foraminifera. ... : Supplement to: Keigwin, Lloyd D; Guilderson, Thomas P (2009): Bioturbation artifacts in zero-age sediments. Paleoceanography, 24(4), PA4212 ... Dataset Antarc* Antarctic North Atlantic Planktonic foraminifera DataCite Antarctic |
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DataCite |
op_collection_id |
ftdatacite |
language |
English |
topic |
Event label Latitude of event Longitude of event Elevation of event Laboratory code/label DEPTH, sediment/rock Age, dated material Fraction modern carbon Fraction modern carbon, error Age, dated Age, dated standard deviation Δ14C Reference/source MultiCorer Box corer Age, 14C AMS KNR178 Knorr |
spellingShingle |
Event label Latitude of event Longitude of event Elevation of event Laboratory code/label DEPTH, sediment/rock Age, dated material Fraction modern carbon Fraction modern carbon, error Age, dated Age, dated standard deviation Δ14C Reference/source MultiCorer Box corer Age, 14C AMS KNR178 Knorr Keigwin, Lloyd D Guilderson, Thomas P (Table 1) Age determination of surface sediment samples from the North Atlantic ... |
topic_facet |
Event label Latitude of event Longitude of event Elevation of event Laboratory code/label DEPTH, sediment/rock Age, dated material Fraction modern carbon Fraction modern carbon, error Age, dated Age, dated standard deviation Δ14C Reference/source MultiCorer Box corer Age, 14C AMS KNR178 Knorr |
description |
Most seafloor sediments are dated with radiocarbon, and the sediment is assumed to be zero-age (modern) when the signal of atmospheric testing of nuclear weapons is present (Fraction modern (Fm) > 1). Using a simple mass balance, we show that even with Fm > 1, half of the planktonic foraminifera at the seafloor can be centuries old, because of bioturbation. This calculation, and data from four core sites in the western North Atlantic indicate that, first, during some part of the Little Ice Age (LIA) there may have been more Antarctic Bottom Water than today in the deep western North Atlantic. Alternatively, bioturbation may have introduced much older benthic foraminifera into surface sediments. Second, paleo-based warming of Sargasso Sea surface waters since the LIA must lag the actual warming because of bioturbation of older and colder foraminifera. ... : Supplement to: Keigwin, Lloyd D; Guilderson, Thomas P (2009): Bioturbation artifacts in zero-age sediments. Paleoceanography, 24(4), PA4212 ... |
format |
Dataset |
author |
Keigwin, Lloyd D Guilderson, Thomas P |
author_facet |
Keigwin, Lloyd D Guilderson, Thomas P |
author_sort |
Keigwin, Lloyd D |
title |
(Table 1) Age determination of surface sediment samples from the North Atlantic ... |
title_short |
(Table 1) Age determination of surface sediment samples from the North Atlantic ... |
title_full |
(Table 1) Age determination of surface sediment samples from the North Atlantic ... |
title_fullStr |
(Table 1) Age determination of surface sediment samples from the North Atlantic ... |
title_full_unstemmed |
(Table 1) Age determination of surface sediment samples from the North Atlantic ... |
title_sort |
(table 1) age determination of surface sediment samples from the north atlantic ... |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://dx.doi.org/10.1594/pangaea.831644 https://doi.pangaea.de/10.1594/PANGAEA.831644 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic North Atlantic Planktonic foraminifera |
genre_facet |
Antarc* Antarctic North Atlantic Planktonic foraminifera |
op_relation |
https://dx.doi.org/10.1029/2008pa001727 https://dx.doi.org/10.1126/science.286.5439.520 https://dx.doi.org/10.1126/science.1075287 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_doi |
https://doi.org/10.1594/pangaea.83164410.1029/2008pa00172710.1126/science.286.5439.52010.1126/science.1075287 |
_version_ |
1811633035499536384 |