(Table 1) Age-depth relation in sediment core TTN057-13-PC4
The last glacial to interglacial transition was studied using down core records of stable isotopes in diatoms and foraminifera as well as surface water temperature, sea ice extent, and ice-rafted debris (IRD) concentrations from a piston core retrieved from the Atlantic sector of the Southern Ocean....
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.842939 2023-05-15T14:03:04+02:00 (Table 1) Age-depth relation in sediment core TTN057-13-PC4 Shemesh, Aldo Hodell, David A Crosta, Xavier Kanfoush, Sharon L Charles, Christopher D Guilderson, Thomas P LATITUDE: -53.033333 * LONGITUDE: 5.016667 * MINIMUM DEPTH, sediment/rock: 0.20 m * MAXIMUM DEPTH, sediment/rock: 12.89 m 2002-02-20 text/tab-separated-values, 74 data points https://doi.pangaea.de/10.1594/PANGAEA.842939 https://doi.org/10.1594/PANGAEA.842939 en eng PANGAEA Bard, Edouard; Arnold, Maurice; Hamelin, Bruno; Tisnérat-Laborde, Nadine; Cabioch, Guy (1998): Radiocarbon calibration by means of mass spectrometric 230Th/234U and 14C ages of corals: an updated database including samples from Barbados, Mururoa and Tahiti. Radiocarbon, 40(3), 1085-1092, https://doi.org/10.1017/S0033822200019135 Stuiver, Minze; Reimer, Paula J; Braziunas, Thomas F (1998): High-precision radiocarbon age calibration for terrestrial and marine samples. Radiocarbon, 40(3), 1127-1151, https://doi.org/10.1017/S0033822200019172 https://doi.pangaea.de/10.1594/PANGAEA.842939 https://doi.org/10.1594/PANGAEA.842939 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Shemesh, Aldo; Hodell, David A; Crosta, Xavier; Kanfoush, Sharon L; Charles, Christopher D; Guilderson, Thomas P (2002): Sequence of events during the last deglaciation in Southern Ocean sediments and Antarctic ice cores. Paleoceanography, 17(4), 1056, https://doi.org/10.1029/2000PA000599 Age 14C AMS 14C calibrated dated dated standard deviation Calendar age DEPTH sediment/rock PC Piston corer Reference/source Sample code/label TN057-13-PC4 Dataset 2002 ftpangaea https://doi.org/10.1594/PANGAEA.842939 https://doi.org/10.1029/2000PA000599 https://doi.org/10.1017/S0033822200019135 https://doi.org/10.1017/S0033822200019172 2023-01-20T09:05:19Z The last glacial to interglacial transition was studied using down core records of stable isotopes in diatoms and foraminifera as well as surface water temperature, sea ice extent, and ice-rafted debris (IRD) concentrations from a piston core retrieved from the Atlantic sector of the Southern Ocean. Sea ice is the first variable to change during the last deglaciation, followed by nutrient proxies and sea surface temperature. This sequence of events is independent of the age model adopted for the core. The comparison of the marine records to Antarctic ice CO2 variation depends on the age model as 14C determinations cannot be obtained for the time interval of 29.5-14.5 ka. Assuming a constant sedimentation rate for this interval, our data suggest that sea ice and nutrient changes at about 19 ka B.P. lead the increase in atmospheric pCO2 by approximately 2000 years. Our diatom-based sea ice record is in phase with the sodium record of the Vostok ice core, which is related to sea ice cover and similarly leads the increase in atmospheric CO2. If gas exchange played a major role in determining glacial to interglacial CO2 variations, then a delay mechanism of a few thousand years is needed to explain the observed sequence of events. Otherwise, the main cause of atmospheric pCO2 change must be sought elsewhere, rather than in the Southern Ocean. Dataset Antarc* Antarctic ice core Sea ice Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Southern Ocean ENVELOPE(5.016667,5.016667,-53.033333,-53.033333) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Age 14C AMS 14C calibrated dated dated standard deviation Calendar age DEPTH sediment/rock PC Piston corer Reference/source Sample code/label TN057-13-PC4 |
spellingShingle |
Age 14C AMS 14C calibrated dated dated standard deviation Calendar age DEPTH sediment/rock PC Piston corer Reference/source Sample code/label TN057-13-PC4 Shemesh, Aldo Hodell, David A Crosta, Xavier Kanfoush, Sharon L Charles, Christopher D Guilderson, Thomas P (Table 1) Age-depth relation in sediment core TTN057-13-PC4 |
topic_facet |
Age 14C AMS 14C calibrated dated dated standard deviation Calendar age DEPTH sediment/rock PC Piston corer Reference/source Sample code/label TN057-13-PC4 |
description |
The last glacial to interglacial transition was studied using down core records of stable isotopes in diatoms and foraminifera as well as surface water temperature, sea ice extent, and ice-rafted debris (IRD) concentrations from a piston core retrieved from the Atlantic sector of the Southern Ocean. Sea ice is the first variable to change during the last deglaciation, followed by nutrient proxies and sea surface temperature. This sequence of events is independent of the age model adopted for the core. The comparison of the marine records to Antarctic ice CO2 variation depends on the age model as 14C determinations cannot be obtained for the time interval of 29.5-14.5 ka. Assuming a constant sedimentation rate for this interval, our data suggest that sea ice and nutrient changes at about 19 ka B.P. lead the increase in atmospheric pCO2 by approximately 2000 years. Our diatom-based sea ice record is in phase with the sodium record of the Vostok ice core, which is related to sea ice cover and similarly leads the increase in atmospheric CO2. If gas exchange played a major role in determining glacial to interglacial CO2 variations, then a delay mechanism of a few thousand years is needed to explain the observed sequence of events. Otherwise, the main cause of atmospheric pCO2 change must be sought elsewhere, rather than in the Southern Ocean. |
format |
Dataset |
author |
Shemesh, Aldo Hodell, David A Crosta, Xavier Kanfoush, Sharon L Charles, Christopher D Guilderson, Thomas P |
author_facet |
Shemesh, Aldo Hodell, David A Crosta, Xavier Kanfoush, Sharon L Charles, Christopher D Guilderson, Thomas P |
author_sort |
Shemesh, Aldo |
title |
(Table 1) Age-depth relation in sediment core TTN057-13-PC4 |
title_short |
(Table 1) Age-depth relation in sediment core TTN057-13-PC4 |
title_full |
(Table 1) Age-depth relation in sediment core TTN057-13-PC4 |
title_fullStr |
(Table 1) Age-depth relation in sediment core TTN057-13-PC4 |
title_full_unstemmed |
(Table 1) Age-depth relation in sediment core TTN057-13-PC4 |
title_sort |
(table 1) age-depth relation in sediment core ttn057-13-pc4 |
publisher |
PANGAEA |
publishDate |
2002 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.842939 https://doi.org/10.1594/PANGAEA.842939 |
op_coverage |
LATITUDE: -53.033333 * LONGITUDE: 5.016667 * MINIMUM DEPTH, sediment/rock: 0.20 m * MAXIMUM DEPTH, sediment/rock: 12.89 m |
long_lat |
ENVELOPE(5.016667,5.016667,-53.033333,-53.033333) |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic ice core Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic ice core Sea ice Southern Ocean |
op_source |
Supplement to: Shemesh, Aldo; Hodell, David A; Crosta, Xavier; Kanfoush, Sharon L; Charles, Christopher D; Guilderson, Thomas P (2002): Sequence of events during the last deglaciation in Southern Ocean sediments and Antarctic ice cores. Paleoceanography, 17(4), 1056, https://doi.org/10.1029/2000PA000599 |
op_relation |
Bard, Edouard; Arnold, Maurice; Hamelin, Bruno; Tisnérat-Laborde, Nadine; Cabioch, Guy (1998): Radiocarbon calibration by means of mass spectrometric 230Th/234U and 14C ages of corals: an updated database including samples from Barbados, Mururoa and Tahiti. Radiocarbon, 40(3), 1085-1092, https://doi.org/10.1017/S0033822200019135 Stuiver, Minze; Reimer, Paula J; Braziunas, Thomas F (1998): High-precision radiocarbon age calibration for terrestrial and marine samples. Radiocarbon, 40(3), 1127-1151, https://doi.org/10.1017/S0033822200019172 https://doi.pangaea.de/10.1594/PANGAEA.842939 https://doi.org/10.1594/PANGAEA.842939 |
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.842939 https://doi.org/10.1029/2000PA000599 https://doi.org/10.1017/S0033822200019135 https://doi.org/10.1017/S0033822200019172 |
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