Stable isotope record and calcium carbonate concentrations of Late Pliocene sediments of the North Atlantic
High-resolution records of delta18O, delta13O, and percent CaCO3 from the late Pliocene North Atlantic (Deep Sea Drilling Project sites 607 and 609) are presented and oxygen isotope stages are formalized back to stage 116 at 2.73 Ma. From 2.8 to 1.6 Ma, the interval studied, variations in these reco...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.701337 2023-05-15T16:41:27+02:00 Stable isotope record and calcium carbonate concentrations of Late Pliocene sediments of the North Atlantic Raymo, Maureen E Ruddiman, William F Backman, Jan Clement, Bradford M Martinson, Douglas G MEDIAN LATITUDE: 31.128800 * MEDIAN LONGITUDE: -23.904140 * SOUTH-BOUND LATITUDE: -26.114000 * WEST-BOUND LONGITUDE: -32.957300 * NORTH-BOUND LATITUDE: 49.877800 * EAST-BOUND LONGITUDE: -5.129700 * DATE/TIME START: 1980-05-06T00:00:00 * DATE/TIME END: 1983-07-22T00:00:00 1989-07-15 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.701337 https://doi.org/10.1594/PANGAEA.701337 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.701337 https://doi.org/10.1594/PANGAEA.701337 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Raymo, Maureen E; Ruddiman, William F; Backman, Jan; Clement, Bradford M; Martinson, Douglas G (1989): Late Pliocene variation in northern hemisphere ice sheets and North Atlantic deep water circulation. Paleoceanography, 4(4), 413-446, https://doi.org/10.1029/PA004i004p00413 73-522A 94-607 94-607_Site 94-609 94-609_Site 94-609B COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg73 Leg94 North Atlantic/FLANK South Atlantic/PLATEAU Dataset 1989 ftpangaea https://doi.org/10.1594/PANGAEA.701337 https://doi.org/10.1029/PA004i004p00413 2023-01-20T07:31:12Z High-resolution records of delta18O, delta13O, and percent CaCO3 from the late Pliocene North Atlantic (Deep Sea Drilling Project sites 607 and 609) are presented and oxygen isotope stages are formalized back to stage 116 at 2.73 Ma. From 2.8 to 1.6 Ma, the interval studied, variations in these records were dominated by the 41-kyr component of orbital obliquity. Significant variation at the orbital frequencies of eccentricity (96-kyr) and precession (23-kyr) are observed in the delta18O record between 1.6 and 2.1 Ma, but not before. Prior to 2.4 Ma (stage 100), delta18O variations suggest ice sheet growth 1/4 to 1/2 as large as late Pleistocene ice volumes; however, these events are below the threshold needed to result in extensive ice-rafting to the open North Atlantic Ocean. After 2.4 Ma, ice sheets appear to be, on average, 1/2 as large as those of the late Pleistocene. The delta18O record indicates that some glacial suppression of North Atlantic Deep Water occurred both before and after 2.4 Ma and that glacial-interglacial transfers of 12C between the continents and oceans appear to have been larger in the late Pliocene relative to the late Pleistocene. In addition, the strong 23-kyr power observed in delta18O between 2.75 and 2.10 Ma suggests that deep-sea circulation (or changes in biomass) is controlled, in part, by climatic variations unrelated to ice sheets. Dataset Ice Sheet North Atlantic Deep Water North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-32.957300,-5.129700,49.877800,-26.114000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
73-522A 94-607 94-607_Site 94-609 94-609_Site 94-609B COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg73 Leg94 North Atlantic/FLANK South Atlantic/PLATEAU |
spellingShingle |
73-522A 94-607 94-607_Site 94-609 94-609_Site 94-609B COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg73 Leg94 North Atlantic/FLANK South Atlantic/PLATEAU Raymo, Maureen E Ruddiman, William F Backman, Jan Clement, Bradford M Martinson, Douglas G Stable isotope record and calcium carbonate concentrations of Late Pliocene sediments of the North Atlantic |
topic_facet |
73-522A 94-607 94-607_Site 94-609 94-609_Site 94-609B COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Leg73 Leg94 North Atlantic/FLANK South Atlantic/PLATEAU |
description |
High-resolution records of delta18O, delta13O, and percent CaCO3 from the late Pliocene North Atlantic (Deep Sea Drilling Project sites 607 and 609) are presented and oxygen isotope stages are formalized back to stage 116 at 2.73 Ma. From 2.8 to 1.6 Ma, the interval studied, variations in these records were dominated by the 41-kyr component of orbital obliquity. Significant variation at the orbital frequencies of eccentricity (96-kyr) and precession (23-kyr) are observed in the delta18O record between 1.6 and 2.1 Ma, but not before. Prior to 2.4 Ma (stage 100), delta18O variations suggest ice sheet growth 1/4 to 1/2 as large as late Pleistocene ice volumes; however, these events are below the threshold needed to result in extensive ice-rafting to the open North Atlantic Ocean. After 2.4 Ma, ice sheets appear to be, on average, 1/2 as large as those of the late Pleistocene. The delta18O record indicates that some glacial suppression of North Atlantic Deep Water occurred both before and after 2.4 Ma and that glacial-interglacial transfers of 12C between the continents and oceans appear to have been larger in the late Pliocene relative to the late Pleistocene. In addition, the strong 23-kyr power observed in delta18O between 2.75 and 2.10 Ma suggests that deep-sea circulation (or changes in biomass) is controlled, in part, by climatic variations unrelated to ice sheets. |
format |
Dataset |
author |
Raymo, Maureen E Ruddiman, William F Backman, Jan Clement, Bradford M Martinson, Douglas G |
author_facet |
Raymo, Maureen E Ruddiman, William F Backman, Jan Clement, Bradford M Martinson, Douglas G |
author_sort |
Raymo, Maureen E |
title |
Stable isotope record and calcium carbonate concentrations of Late Pliocene sediments of the North Atlantic |
title_short |
Stable isotope record and calcium carbonate concentrations of Late Pliocene sediments of the North Atlantic |
title_full |
Stable isotope record and calcium carbonate concentrations of Late Pliocene sediments of the North Atlantic |
title_fullStr |
Stable isotope record and calcium carbonate concentrations of Late Pliocene sediments of the North Atlantic |
title_full_unstemmed |
Stable isotope record and calcium carbonate concentrations of Late Pliocene sediments of the North Atlantic |
title_sort |
stable isotope record and calcium carbonate concentrations of late pliocene sediments of the north atlantic |
publisher |
PANGAEA |
publishDate |
1989 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.701337 https://doi.org/10.1594/PANGAEA.701337 |
op_coverage |
MEDIAN LATITUDE: 31.128800 * MEDIAN LONGITUDE: -23.904140 * SOUTH-BOUND LATITUDE: -26.114000 * WEST-BOUND LONGITUDE: -32.957300 * NORTH-BOUND LATITUDE: 49.877800 * EAST-BOUND LONGITUDE: -5.129700 * DATE/TIME START: 1980-05-06T00:00:00 * DATE/TIME END: 1983-07-22T00:00:00 |
long_lat |
ENVELOPE(-32.957300,-5.129700,49.877800,-26.114000) |
genre |
Ice Sheet North Atlantic Deep Water North Atlantic |
genre_facet |
Ice Sheet North Atlantic Deep Water North Atlantic |
op_source |
Supplement to: Raymo, Maureen E; Ruddiman, William F; Backman, Jan; Clement, Bradford M; Martinson, Douglas G (1989): Late Pliocene variation in northern hemisphere ice sheets and North Atlantic deep water circulation. Paleoceanography, 4(4), 413-446, https://doi.org/10.1029/PA004i004p00413 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.701337 https://doi.org/10.1594/PANGAEA.701337 |
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.701337 https://doi.org/10.1029/PA004i004p00413 |
_version_ |
1766031879123763200 |