Benthic foraminiferal multiproxy record of sediment core MD03-2707
We present a benthic foraminiferal multiproxy record of eastern equatorial Atlantic (EEA) middepth water (1295 m) covering the last deglacial. We show that EEA middepth water temperatures were elevated by 3.9 ± 0.5°C and 5.2 ± 1.2°C during Heinrich event 1 (H1) and Younger Dryas (YD), respectively....
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.877253 2023-05-15T17:31:19+02:00 Benthic foraminiferal multiproxy record of sediment core MD03-2707 Weldeab, Syee Friedrich, Tobias Timmermann, Axel Schneider, Ralph R LATITUDE: 2.502000 * LONGITUDE: 9.395000 2016-06-28 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.877253 https://doi.org/10.1594/PANGAEA.877253 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.877253 https://doi.org/10.1594/PANGAEA.877253 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Weldeab, Syee; Friedrich, Tobias; Timmermann, Axel; Schneider, Ralph R (2016): Strong middepth warming and weak radiocarbon imprints in the equatorial Atlantic during Heinrich 1 and Younger Dryas. Paleoceanography, 31(8), 1070-1082, https://doi.org/10.1002/2016PA002957 MD03-2707 PC Piston corer Dataset 2016 ftpangaea https://doi.org/10.1594/PANGAEA.877253 https://doi.org/10.1002/2016PA002957 2023-01-20T07:33:58Z We present a benthic foraminiferal multiproxy record of eastern equatorial Atlantic (EEA) middepth water (1295 m) covering the last deglacial. We show that EEA middepth water temperatures were elevated by 3.9 ± 0.5°C and 5.2 ± 1.2°C during Heinrich event 1 (H1) and Younger Dryas (YD), respectively. The radiocarbon content of the EEA middepth during H1 and YD is relatively low and comparable to the values of the pre-H1 episode and Bølling-Allerød, respectively. A transient Earth system model simulation, which mimics the observed deglacial Atlantic Meridional Overturning Circulation (AMOC) history, qualitatively reproduces the major features of the EEA proxy records. The simulation results suggest that fresh water-induced weakening of the AMOC leads to a vertical shift of the horizon of Southern Ocean-sourced water and a stronger influence of EEA sea surface temperatures via mixing. Our findings reaffirm the lack of a distinctive signature of radiocarbon depletion and therefore do not support the notion of interhemispheric exchanges of strongly radiocarbon-depleted middepth water across the tropical Atlantic during H1 and YD. Our temperature reconstruction presents a critical zonal and water depth extension of existing tropical Atlantic data and documents a large-scale and basin-wide warming across the thermocline and middepth of the tropical Atlantic during H1 and YD. Significant difference in the timing and pace of H1 middepth warming between tropical Atlantic and North Atlantic likely points to a limited role of the tropical Atlantic middepth warming in the rapid heat buildup in the North Atlantic middepth. Dataset North Atlantic Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Southern Ocean ENVELOPE(9.395000,9.395000,2.502000,2.502000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
MD03-2707 PC Piston corer |
spellingShingle |
MD03-2707 PC Piston corer Weldeab, Syee Friedrich, Tobias Timmermann, Axel Schneider, Ralph R Benthic foraminiferal multiproxy record of sediment core MD03-2707 |
topic_facet |
MD03-2707 PC Piston corer |
description |
We present a benthic foraminiferal multiproxy record of eastern equatorial Atlantic (EEA) middepth water (1295 m) covering the last deglacial. We show that EEA middepth water temperatures were elevated by 3.9 ± 0.5°C and 5.2 ± 1.2°C during Heinrich event 1 (H1) and Younger Dryas (YD), respectively. The radiocarbon content of the EEA middepth during H1 and YD is relatively low and comparable to the values of the pre-H1 episode and Bølling-Allerød, respectively. A transient Earth system model simulation, which mimics the observed deglacial Atlantic Meridional Overturning Circulation (AMOC) history, qualitatively reproduces the major features of the EEA proxy records. The simulation results suggest that fresh water-induced weakening of the AMOC leads to a vertical shift of the horizon of Southern Ocean-sourced water and a stronger influence of EEA sea surface temperatures via mixing. Our findings reaffirm the lack of a distinctive signature of radiocarbon depletion and therefore do not support the notion of interhemispheric exchanges of strongly radiocarbon-depleted middepth water across the tropical Atlantic during H1 and YD. Our temperature reconstruction presents a critical zonal and water depth extension of existing tropical Atlantic data and documents a large-scale and basin-wide warming across the thermocline and middepth of the tropical Atlantic during H1 and YD. Significant difference in the timing and pace of H1 middepth warming between tropical Atlantic and North Atlantic likely points to a limited role of the tropical Atlantic middepth warming in the rapid heat buildup in the North Atlantic middepth. |
format |
Dataset |
author |
Weldeab, Syee Friedrich, Tobias Timmermann, Axel Schneider, Ralph R |
author_facet |
Weldeab, Syee Friedrich, Tobias Timmermann, Axel Schneider, Ralph R |
author_sort |
Weldeab, Syee |
title |
Benthic foraminiferal multiproxy record of sediment core MD03-2707 |
title_short |
Benthic foraminiferal multiproxy record of sediment core MD03-2707 |
title_full |
Benthic foraminiferal multiproxy record of sediment core MD03-2707 |
title_fullStr |
Benthic foraminiferal multiproxy record of sediment core MD03-2707 |
title_full_unstemmed |
Benthic foraminiferal multiproxy record of sediment core MD03-2707 |
title_sort |
benthic foraminiferal multiproxy record of sediment core md03-2707 |
publisher |
PANGAEA |
publishDate |
2016 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.877253 https://doi.org/10.1594/PANGAEA.877253 |
op_coverage |
LATITUDE: 2.502000 * LONGITUDE: 9.395000 |
long_lat |
ENVELOPE(9.395000,9.395000,2.502000,2.502000) |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
North Atlantic Southern Ocean |
genre_facet |
North Atlantic Southern Ocean |
op_source |
Supplement to: Weldeab, Syee; Friedrich, Tobias; Timmermann, Axel; Schneider, Ralph R (2016): Strong middepth warming and weak radiocarbon imprints in the equatorial Atlantic during Heinrich 1 and Younger Dryas. Paleoceanography, 31(8), 1070-1082, https://doi.org/10.1002/2016PA002957 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.877253 https://doi.org/10.1594/PANGAEA.877253 |
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.877253 https://doi.org/10.1002/2016PA002957 |
_version_ |
1766128824509005824 |