Stable isotope record of benthic foraminifera in late Pleistocene sediments
Variations in the contribution of North Atlantic Deep Water (NADW), relative to North Pacific Deep Water (NPDW), to the Southern Ocean, are assessed by comparing delta13C records from the mid-depth North Atlantic, deep Southern Ocean, and deep equatorial Pacific Ocean. In general, the relative contr...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.701361 2024-06-02T08:10:29+00:00 Stable isotope record of benthic foraminifera in late Pleistocene sediments Oppo, Delia W Fairbanks, Richard G Gordon, Arnold L Shackleton, Nicholas J MEDIAN LATITUDE: 1.053540 * MEDIAN LONGITUDE: -55.599060 * SOUTH-BOUND LATITUDE: -25.490000 * WEST-BOUND LONGITUDE: -171.200000 * NORTH-BOUND LATITUDE: 56.042700 * EAST-BOUND LONGITUDE: 11.307000 * DATE/TIME START: 1969-12-31T00:00:00 * DATE/TIME END: 1981-07-31T00:00:00 1990 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.701361 https://doi.org/10.1594/PANGAEA.701361 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.701361 https://doi.org/10.1594/PANGAEA.701361 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Oppo, Delia W; Fairbanks, Richard G; Gordon, Arnold L; Shackleton, Nicholas J (1990): Late Pleistocene Southern Ocean d13C variability. Paleoceanography, 5(1), 43-54, https://doi.org/10.1029/PA005i001p00043 81-552A Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Lamont-Doherty Earth Observatory Columbia University LDEO Leg81 North Atlantic/PLATEAU PC Piston corer RC13 RC13-22 RC13-229 Robert Conrad Dataset 1990 ftpangaea https://doi.org/10.1594/PANGAEA.70136110.1029/PA005i001p00043 2024-05-07T23:45:53Z Variations in the contribution of North Atlantic Deep Water (NADW), relative to North Pacific Deep Water (NPDW), to the Southern Ocean, are assessed by comparing delta13C records from the mid-depth North Atlantic, deep Southern Ocean, and deep equatorial Pacific Ocean. In general, the relative contribution of NADW was greater during interglaciations than glaciations of the past 550,000 years. An increase in the NADW flux to the Southern Ocean since the last glaciation was proposed to have resulted in higher atmospheric CO2 in the Holocene (Broecker and Peng, 1989, doi:10.1029/GB003i003p00215). Glacial-interglacial variations in the proportion of NADW in the Southern Ocean may have also influenced atmospheric CO2 levels over the past 550,000 years. The greatest relative flux of NADW to the Southern Ocean occurred during interglacial stage 11. Faunal data suggest that the North Atlantic polar front and southern Indian Ocean subtropical convergence zone were located farthest poleward during stage 11. Warmth in these locations and a strong southward flux of NADW during stage 11 may be causally linked by the NADW formation process/warm water return route (Gordon, 1986, doi:10.1029/JC091iC04p05037). Time series analysis indicates that delta13C variations in the deep Southern Ocean occur at the same frequencies as the Earth's orbital variations and are coherent and in phase with delta18O. At most, 50% of the glacial-interglacial delta13C amplitude in the Southern Ocean is due changes in the contribution of NADW. The remainder is probably due to mean ocean delta13C changes. Dataset NADW North Atlantic Deep Water North Atlantic Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Southern Ocean Pacific Indian ENVELOPE(-171.200000,11.307000,56.042700,-25.490000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
81-552A Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Lamont-Doherty Earth Observatory Columbia University LDEO Leg81 North Atlantic/PLATEAU PC Piston corer RC13 RC13-22 RC13-229 Robert Conrad |
spellingShingle |
81-552A Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Lamont-Doherty Earth Observatory Columbia University LDEO Leg81 North Atlantic/PLATEAU PC Piston corer RC13 RC13-22 RC13-229 Robert Conrad Oppo, Delia W Fairbanks, Richard G Gordon, Arnold L Shackleton, Nicholas J Stable isotope record of benthic foraminifera in late Pleistocene sediments |
topic_facet |
81-552A Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Lamont-Doherty Earth Observatory Columbia University LDEO Leg81 North Atlantic/PLATEAU PC Piston corer RC13 RC13-22 RC13-229 Robert Conrad |
description |
Variations in the contribution of North Atlantic Deep Water (NADW), relative to North Pacific Deep Water (NPDW), to the Southern Ocean, are assessed by comparing delta13C records from the mid-depth North Atlantic, deep Southern Ocean, and deep equatorial Pacific Ocean. In general, the relative contribution of NADW was greater during interglaciations than glaciations of the past 550,000 years. An increase in the NADW flux to the Southern Ocean since the last glaciation was proposed to have resulted in higher atmospheric CO2 in the Holocene (Broecker and Peng, 1989, doi:10.1029/GB003i003p00215). Glacial-interglacial variations in the proportion of NADW in the Southern Ocean may have also influenced atmospheric CO2 levels over the past 550,000 years. The greatest relative flux of NADW to the Southern Ocean occurred during interglacial stage 11. Faunal data suggest that the North Atlantic polar front and southern Indian Ocean subtropical convergence zone were located farthest poleward during stage 11. Warmth in these locations and a strong southward flux of NADW during stage 11 may be causally linked by the NADW formation process/warm water return route (Gordon, 1986, doi:10.1029/JC091iC04p05037). Time series analysis indicates that delta13C variations in the deep Southern Ocean occur at the same frequencies as the Earth's orbital variations and are coherent and in phase with delta18O. At most, 50% of the glacial-interglacial delta13C amplitude in the Southern Ocean is due changes in the contribution of NADW. The remainder is probably due to mean ocean delta13C changes. |
format |
Dataset |
author |
Oppo, Delia W Fairbanks, Richard G Gordon, Arnold L Shackleton, Nicholas J |
author_facet |
Oppo, Delia W Fairbanks, Richard G Gordon, Arnold L Shackleton, Nicholas J |
author_sort |
Oppo, Delia W |
title |
Stable isotope record of benthic foraminifera in late Pleistocene sediments |
title_short |
Stable isotope record of benthic foraminifera in late Pleistocene sediments |
title_full |
Stable isotope record of benthic foraminifera in late Pleistocene sediments |
title_fullStr |
Stable isotope record of benthic foraminifera in late Pleistocene sediments |
title_full_unstemmed |
Stable isotope record of benthic foraminifera in late Pleistocene sediments |
title_sort |
stable isotope record of benthic foraminifera in late pleistocene sediments |
publisher |
PANGAEA |
publishDate |
1990 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.701361 https://doi.org/10.1594/PANGAEA.701361 |
op_coverage |
MEDIAN LATITUDE: 1.053540 * MEDIAN LONGITUDE: -55.599060 * SOUTH-BOUND LATITUDE: -25.490000 * WEST-BOUND LONGITUDE: -171.200000 * NORTH-BOUND LATITUDE: 56.042700 * EAST-BOUND LONGITUDE: 11.307000 * DATE/TIME START: 1969-12-31T00:00:00 * DATE/TIME END: 1981-07-31T00:00:00 |
long_lat |
ENVELOPE(-171.200000,11.307000,56.042700,-25.490000) |
geographic |
Southern Ocean Pacific Indian |
geographic_facet |
Southern Ocean Pacific Indian |
genre |
NADW North Atlantic Deep Water North Atlantic Southern Ocean |
genre_facet |
NADW North Atlantic Deep Water North Atlantic Southern Ocean |
op_source |
Supplement to: Oppo, Delia W; Fairbanks, Richard G; Gordon, Arnold L; Shackleton, Nicholas J (1990): Late Pleistocene Southern Ocean d13C variability. Paleoceanography, 5(1), 43-54, https://doi.org/10.1029/PA005i001p00043 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.701361 https://doi.org/10.1594/PANGAEA.701361 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.70136110.1029/PA005i001p00043 |
_version_ |
1800756371451281408 |