Neodymium and Strontium chemistry of Arctic Ocean sediments
The early oceanographic history of the Arctic Ocean is important in regulating, and responding to, climatic changes. However, constraints on its oceanographic history preceding the Quaternary (the past 1.8 Myr) have become available only recently, because of the difficulties associated with obtainin...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.769604 2023-05-15T13:22:45+02:00 Neodymium and Strontium chemistry of Arctic Ocean sediments Haley, Brian A Frank, Martin Spielhagen, Robert F Eisenhauer, Anton MEDIAN LATITUDE: 87.972785 * MEDIAN LONGITUDE: 123.609271 * SOUTH-BOUND LATITUDE: 86.241800 * WEST-BOUND LONGITUDE: 32.973333 * NORTH-BOUND LATITUDE: 89.986667 * EAST-BOUND LONGITUDE: 144.166200 * DATE/TIME START: 1991-08-13T00:00:00 * DATE/TIME END: 2001-09-06T19:52:00 2008-09-05 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.769604 https://doi.org/10.1594/PANGAEA.769604 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.769604 https://doi.org/10.1594/PANGAEA.769604 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Haley, Brian A; Frank, Martin; Spielhagen, Robert F; Eisenhauer, Anton (2008): Influence of brine formation on Arctic Ocean circulation over the past 15 million years. Nature Geoscience, 1, 68-72, https://doi.org/10.1038/ngeo.2007.5 302-CompSite Amundsen Basin Arctic Coring Expedition ACEX ARK-VIII/3 ARK-XVII/2 COMPCORE Composite Core Exp302 Gakkel Ridge Arctic Ocean Giant box corer GKG Integrated Ocean Drilling Program / International Ocean Discovery Program IODP KAL Kasten corer Lomonosov Ridge Polarstern PS19/157 PS19/166 PS19/178 PS19/186 PS19/189 PS19/194 PS19 ARCTIC91 PS2163-2 PS2171-1 PS2179-1 PS2185-3 PS2185-6 PS2186-5 PS2190-3 PS59/280-1 PS59/280-2 PS59 AMORE SD Secchi disk Vidar Viking Dataset 2008 ftpangaea https://doi.org/10.1594/PANGAEA.769604 https://doi.org/10.1038/ngeo.2007.5 2023-01-20T07:32:18Z The early oceanographic history of the Arctic Ocean is important in regulating, and responding to, climatic changes. However, constraints on its oceanographic history preceding the Quaternary (the past 1.8 Myr) have become available only recently, because of the difficulties associated with obtaining continuous sediment records in such a hostile setting. Here, we use the neodymium isotope compositions of two sediment cores recovered near the North Pole to reconstruct over the past ~5 Myr the sources contributing to Arctic Intermediate Water, a water mass found today at depths of 200 to 1,500 m. We interpret high neodymium ratios for the period between 15 and 2 Myr ago, and for the glacial periods thereafter, as indicative of weathering input from the Siberian Putoranan basalts into the Arctic Ocean. Arctic Intermediate Water was then derived from brine formation in the Eurasian shelf regions, with only a limited contribution of intermediate water from the North Atlantic. In contrast, the modern circulation pattern, with relatively high contributions of North Atlantic Intermediate Water and negligible input from brine formation, exhibits low neodymium isotope ratios and is typical for the interglacial periods of the past 2 Myr. We suggest that changes in climatic conditions and the tectonic setting were responsible for switches between these two modes. Dataset amundsen basin Arctic Arctic Arctic Ocean Lomonosov Ridge North Atlantic North Pole PANGAEA - Data Publisher for Earth & Environmental Science Amundsen Basin ENVELOPE(74.000,74.000,87.000,87.000) Arctic Arctic Ocean Gakkel Ridge ENVELOPE(90.000,90.000,87.000,87.000) North Pole ENVELOPE(32.973333,144.166200,89.986667,86.241800) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
302-CompSite Amundsen Basin Arctic Coring Expedition ACEX ARK-VIII/3 ARK-XVII/2 COMPCORE Composite Core Exp302 Gakkel Ridge Arctic Ocean Giant box corer GKG Integrated Ocean Drilling Program / International Ocean Discovery Program IODP KAL Kasten corer Lomonosov Ridge Polarstern PS19/157 PS19/166 PS19/178 PS19/186 PS19/189 PS19/194 PS19 ARCTIC91 PS2163-2 PS2171-1 PS2179-1 PS2185-3 PS2185-6 PS2186-5 PS2190-3 PS59/280-1 PS59/280-2 PS59 AMORE SD Secchi disk Vidar Viking |
spellingShingle |
302-CompSite Amundsen Basin Arctic Coring Expedition ACEX ARK-VIII/3 ARK-XVII/2 COMPCORE Composite Core Exp302 Gakkel Ridge Arctic Ocean Giant box corer GKG Integrated Ocean Drilling Program / International Ocean Discovery Program IODP KAL Kasten corer Lomonosov Ridge Polarstern PS19/157 PS19/166 PS19/178 PS19/186 PS19/189 PS19/194 PS19 ARCTIC91 PS2163-2 PS2171-1 PS2179-1 PS2185-3 PS2185-6 PS2186-5 PS2190-3 PS59/280-1 PS59/280-2 PS59 AMORE SD Secchi disk Vidar Viking Haley, Brian A Frank, Martin Spielhagen, Robert F Eisenhauer, Anton Neodymium and Strontium chemistry of Arctic Ocean sediments |
topic_facet |
302-CompSite Amundsen Basin Arctic Coring Expedition ACEX ARK-VIII/3 ARK-XVII/2 COMPCORE Composite Core Exp302 Gakkel Ridge Arctic Ocean Giant box corer GKG Integrated Ocean Drilling Program / International Ocean Discovery Program IODP KAL Kasten corer Lomonosov Ridge Polarstern PS19/157 PS19/166 PS19/178 PS19/186 PS19/189 PS19/194 PS19 ARCTIC91 PS2163-2 PS2171-1 PS2179-1 PS2185-3 PS2185-6 PS2186-5 PS2190-3 PS59/280-1 PS59/280-2 PS59 AMORE SD Secchi disk Vidar Viking |
description |
The early oceanographic history of the Arctic Ocean is important in regulating, and responding to, climatic changes. However, constraints on its oceanographic history preceding the Quaternary (the past 1.8 Myr) have become available only recently, because of the difficulties associated with obtaining continuous sediment records in such a hostile setting. Here, we use the neodymium isotope compositions of two sediment cores recovered near the North Pole to reconstruct over the past ~5 Myr the sources contributing to Arctic Intermediate Water, a water mass found today at depths of 200 to 1,500 m. We interpret high neodymium ratios for the period between 15 and 2 Myr ago, and for the glacial periods thereafter, as indicative of weathering input from the Siberian Putoranan basalts into the Arctic Ocean. Arctic Intermediate Water was then derived from brine formation in the Eurasian shelf regions, with only a limited contribution of intermediate water from the North Atlantic. In contrast, the modern circulation pattern, with relatively high contributions of North Atlantic Intermediate Water and negligible input from brine formation, exhibits low neodymium isotope ratios and is typical for the interglacial periods of the past 2 Myr. We suggest that changes in climatic conditions and the tectonic setting were responsible for switches between these two modes. |
format |
Dataset |
author |
Haley, Brian A Frank, Martin Spielhagen, Robert F Eisenhauer, Anton |
author_facet |
Haley, Brian A Frank, Martin Spielhagen, Robert F Eisenhauer, Anton |
author_sort |
Haley, Brian A |
title |
Neodymium and Strontium chemistry of Arctic Ocean sediments |
title_short |
Neodymium and Strontium chemistry of Arctic Ocean sediments |
title_full |
Neodymium and Strontium chemistry of Arctic Ocean sediments |
title_fullStr |
Neodymium and Strontium chemistry of Arctic Ocean sediments |
title_full_unstemmed |
Neodymium and Strontium chemistry of Arctic Ocean sediments |
title_sort |
neodymium and strontium chemistry of arctic ocean sediments |
publisher |
PANGAEA |
publishDate |
2008 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.769604 https://doi.org/10.1594/PANGAEA.769604 |
op_coverage |
MEDIAN LATITUDE: 87.972785 * MEDIAN LONGITUDE: 123.609271 * SOUTH-BOUND LATITUDE: 86.241800 * WEST-BOUND LONGITUDE: 32.973333 * NORTH-BOUND LATITUDE: 89.986667 * EAST-BOUND LONGITUDE: 144.166200 * DATE/TIME START: 1991-08-13T00:00:00 * DATE/TIME END: 2001-09-06T19:52:00 |
long_lat |
ENVELOPE(74.000,74.000,87.000,87.000) ENVELOPE(90.000,90.000,87.000,87.000) ENVELOPE(32.973333,144.166200,89.986667,86.241800) |
geographic |
Amundsen Basin Arctic Arctic Ocean Gakkel Ridge North Pole |
geographic_facet |
Amundsen Basin Arctic Arctic Ocean Gakkel Ridge North Pole |
genre |
amundsen basin Arctic Arctic Arctic Ocean Lomonosov Ridge North Atlantic North Pole |
genre_facet |
amundsen basin Arctic Arctic Arctic Ocean Lomonosov Ridge North Atlantic North Pole |
op_source |
Supplement to: Haley, Brian A; Frank, Martin; Spielhagen, Robert F; Eisenhauer, Anton (2008): Influence of brine formation on Arctic Ocean circulation over the past 15 million years. Nature Geoscience, 1, 68-72, https://doi.org/10.1038/ngeo.2007.5 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.769604 https://doi.org/10.1594/PANGAEA.769604 |
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.769604 https://doi.org/10.1038/ngeo.2007.5 |
_version_ |
1766366754526724096 |