Nd isotopes of sediments, foraminifera and fish debris of the western North Atlantic
Understanding changes in ocean circulation during the last deglaciation is crucial to unraveling the dynamics of glacial-interglacial and millennial climate shifts. We used neodymium isotope measurements on postdepositional iron-manganese oxide coatings precipitated on planktonic foraminifera to rec...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.771834 2023-05-15T17:27:30+02:00 Nd isotopes of sediments, foraminifera and fish debris of the western North Atlantic Roberts, Natalie L Piotrowski, Alexander M McManus, Jerry F Keigwin, Lloyd D MEDIAN LATITUDE: 33.379539 * MEDIAN LONGITUDE: -58.918318 * SOUTH-BOUND LATITUDE: 29.975389 * WEST-BOUND LONGITUDE: -73.599861 * NORTH-BOUND LATITUDE: 33.700000 * EAST-BOUND LONGITUDE: -57.576000 * DATE/TIME START: 1984-08-31T00:00:00 * DATE/TIME END: 1997-03-25T00:00:00 2010-11-24 application/zip, 6 datasets https://doi.pangaea.de/10.1594/PANGAEA.771834 https://doi.org/10.1594/PANGAEA.771834 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.771834 https://doi.org/10.1594/PANGAEA.771834 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Roberts, Natalie L; Piotrowski, Alexander M; McManus, Jerry F; Keigwin, Lloyd D (2010): Synchronous deglacial overturning and water mass source changes. Science, 327(5961), 75-78, https://doi.org/10.1126/science.1178068 172-1061 172-1063 Blake-Bahama Outer Ridge North Atlantic Ocean COMPCORE Composite Core EN120 EN120-1GGC Endeavor GC GGC5 GGC6 Gravity corer Joides Resolution Leg172 North Atlantic OCE326-GGC5 OCE326-GGC6 Ocean Drilling Program ODP Dataset 2010 ftpangaea https://doi.org/10.1594/PANGAEA.771834 https://doi.org/10.1126/science.1178068 2023-01-20T07:32:20Z Understanding changes in ocean circulation during the last deglaciation is crucial to unraveling the dynamics of glacial-interglacial and millennial climate shifts. We used neodymium isotope measurements on postdepositional iron-manganese oxide coatings precipitated on planktonic foraminifera to reconstruct changes in the bottom water source of the deep western North Atlantic at the Bermuda Rise. Comparison of our deep water source record with overturning strength proxies shows that both the deep water mass source and the overturning rate shifted rapidly and synchronously during the last deglacial transition. In contrast, any freshwater perturbation caused by Heinrich event 1 could have only affected shallow overturning. These findings show how changes in upper-ocean overturning associated with millennial-scale events differ from those associated with whole-ocean deglacial climate events. Dataset North Atlantic Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-73.599861,-57.576000,33.700000,29.975389) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
172-1061 172-1063 Blake-Bahama Outer Ridge North Atlantic Ocean COMPCORE Composite Core EN120 EN120-1GGC Endeavor GC GGC5 GGC6 Gravity corer Joides Resolution Leg172 North Atlantic OCE326-GGC5 OCE326-GGC6 Ocean Drilling Program ODP |
spellingShingle |
172-1061 172-1063 Blake-Bahama Outer Ridge North Atlantic Ocean COMPCORE Composite Core EN120 EN120-1GGC Endeavor GC GGC5 GGC6 Gravity corer Joides Resolution Leg172 North Atlantic OCE326-GGC5 OCE326-GGC6 Ocean Drilling Program ODP Roberts, Natalie L Piotrowski, Alexander M McManus, Jerry F Keigwin, Lloyd D Nd isotopes of sediments, foraminifera and fish debris of the western North Atlantic |
topic_facet |
172-1061 172-1063 Blake-Bahama Outer Ridge North Atlantic Ocean COMPCORE Composite Core EN120 EN120-1GGC Endeavor GC GGC5 GGC6 Gravity corer Joides Resolution Leg172 North Atlantic OCE326-GGC5 OCE326-GGC6 Ocean Drilling Program ODP |
description |
Understanding changes in ocean circulation during the last deglaciation is crucial to unraveling the dynamics of glacial-interglacial and millennial climate shifts. We used neodymium isotope measurements on postdepositional iron-manganese oxide coatings precipitated on planktonic foraminifera to reconstruct changes in the bottom water source of the deep western North Atlantic at the Bermuda Rise. Comparison of our deep water source record with overturning strength proxies shows that both the deep water mass source and the overturning rate shifted rapidly and synchronously during the last deglacial transition. In contrast, any freshwater perturbation caused by Heinrich event 1 could have only affected shallow overturning. These findings show how changes in upper-ocean overturning associated with millennial-scale events differ from those associated with whole-ocean deglacial climate events. |
format |
Dataset |
author |
Roberts, Natalie L Piotrowski, Alexander M McManus, Jerry F Keigwin, Lloyd D |
author_facet |
Roberts, Natalie L Piotrowski, Alexander M McManus, Jerry F Keigwin, Lloyd D |
author_sort |
Roberts, Natalie L |
title |
Nd isotopes of sediments, foraminifera and fish debris of the western North Atlantic |
title_short |
Nd isotopes of sediments, foraminifera and fish debris of the western North Atlantic |
title_full |
Nd isotopes of sediments, foraminifera and fish debris of the western North Atlantic |
title_fullStr |
Nd isotopes of sediments, foraminifera and fish debris of the western North Atlantic |
title_full_unstemmed |
Nd isotopes of sediments, foraminifera and fish debris of the western North Atlantic |
title_sort |
nd isotopes of sediments, foraminifera and fish debris of the western north atlantic |
publisher |
PANGAEA |
publishDate |
2010 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.771834 https://doi.org/10.1594/PANGAEA.771834 |
op_coverage |
MEDIAN LATITUDE: 33.379539 * MEDIAN LONGITUDE: -58.918318 * SOUTH-BOUND LATITUDE: 29.975389 * WEST-BOUND LONGITUDE: -73.599861 * NORTH-BOUND LATITUDE: 33.700000 * EAST-BOUND LONGITUDE: -57.576000 * DATE/TIME START: 1984-08-31T00:00:00 * DATE/TIME END: 1997-03-25T00:00:00 |
long_lat |
ENVELOPE(-73.599861,-57.576000,33.700000,29.975389) |
genre |
North Atlantic Planktonic foraminifera |
genre_facet |
North Atlantic Planktonic foraminifera |
op_source |
Supplement to: Roberts, Natalie L; Piotrowski, Alexander M; McManus, Jerry F; Keigwin, Lloyd D (2010): Synchronous deglacial overturning and water mass source changes. Science, 327(5961), 75-78, https://doi.org/10.1126/science.1178068 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.771834 https://doi.org/10.1594/PANGAEA.771834 |
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.771834 https://doi.org/10.1126/science.1178068 |
_version_ |
1766119645347053568 |