Nd isotope data for ODP Leg 208 holes
The flow of deep-water masses is a key component of heat transport in the modern climate system, yet the role of deep-ocean heat transport during periods of extreme warmth is poorly understood. The present mode of meridional overturning circulation is characterized by deep-water formation in both th...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.724682 2023-05-15T16:29:59+02:00 Nd isotope data for ODP Leg 208 holes Via, Rachael K Thomas, Deborah J MEDIAN LATITUDE: -28.083837 * MEDIAN LONGITUDE: 2.400663 * SOUTH-BOUND LATITUDE: -28.532830 * WEST-BOUND LONGITUDE: 1.577000 * NORTH-BOUND LATITUDE: -27.186000 * EAST-BOUND LONGITUDE: 2.845510 * DATE/TIME START: 2003-03-24T13:00:00 * DATE/TIME END: 2003-04-06T21:55:00 2006-07-09 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.724682 https://doi.org/10.1594/PANGAEA.724682 en eng PANGAEA Table DR1 - Walvis Ridge Nd isotope (URI: ftp://rock.geosociety.org/pub/reposit/2006/2006087.pdf) https://doi.pangaea.de/10.1594/PANGAEA.724682 https://doi.org/10.1594/PANGAEA.724682 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Via, Rachael K; Thomas, Deborah J (2006): Evolution of Atlantic thermohaline circulation: Early Oligocene onset of deep-water production in the North Atlantic. Geology 2006, 34(6), 441-444, https://doi.org/10.1130/G22545.1 208-1262A 208-1263A 208-1264A DRILL Drilling/drill rig Joides Resolution Leg208 Ocean Drilling Program ODP Walvis Ridge Southeast Atlantic Ocean Dataset 2006 ftpangaea https://doi.org/10.1594/PANGAEA.724682 https://doi.org/10.1130/G22545.1 2023-01-20T07:31:27Z The flow of deep-water masses is a key component of heat transport in the modern climate system, yet the role of deep-ocean heat transport during periods of extreme warmth is poorly understood. The present mode of meridional overturning circulation is characterized by deep-water formation in both the North Atlantic and the Southern Ocean. However, a different mode of meridional overturning circulation operated during the extreme greenhouse warmth of the early Cenozoic, during which time the Southern Ocean was the dominant region of deep-water formation. The combination of general global cooling and tectonic evolution of the Atlantic basins over the past ~55 m.y. ultimately led to the development of a mode of overturning circulation characterized by both Southern Ocean and North Atlantic deep-water sources. The change in deep-water circulation mode may, in turn, have affected global climate; however, unraveling the causes and consequences of this transition requires a better understanding of the timing of the transition. New Nd isotope data from the southeastern Atlantic Ocean indicate that the initial transition to a bipolar mode of deep-water circulation occurred in the early Oligocene, ca. 33 Ma. The likely cause of significant deep-water production in the North Atlantic was tectonic deepening of the sill separating the Greenland-Norwegian Sea from the North Atlantic. Dataset Greenland North Atlantic Deep Water North Atlantic Norwegian Sea Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Southern Ocean Norwegian Sea Greenland ENVELOPE(1.577000,2.845510,-27.186000,-28.532830) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
208-1262A 208-1263A 208-1264A DRILL Drilling/drill rig Joides Resolution Leg208 Ocean Drilling Program ODP Walvis Ridge Southeast Atlantic Ocean |
spellingShingle |
208-1262A 208-1263A 208-1264A DRILL Drilling/drill rig Joides Resolution Leg208 Ocean Drilling Program ODP Walvis Ridge Southeast Atlantic Ocean Via, Rachael K Thomas, Deborah J Nd isotope data for ODP Leg 208 holes |
topic_facet |
208-1262A 208-1263A 208-1264A DRILL Drilling/drill rig Joides Resolution Leg208 Ocean Drilling Program ODP Walvis Ridge Southeast Atlantic Ocean |
description |
The flow of deep-water masses is a key component of heat transport in the modern climate system, yet the role of deep-ocean heat transport during periods of extreme warmth is poorly understood. The present mode of meridional overturning circulation is characterized by deep-water formation in both the North Atlantic and the Southern Ocean. However, a different mode of meridional overturning circulation operated during the extreme greenhouse warmth of the early Cenozoic, during which time the Southern Ocean was the dominant region of deep-water formation. The combination of general global cooling and tectonic evolution of the Atlantic basins over the past ~55 m.y. ultimately led to the development of a mode of overturning circulation characterized by both Southern Ocean and North Atlantic deep-water sources. The change in deep-water circulation mode may, in turn, have affected global climate; however, unraveling the causes and consequences of this transition requires a better understanding of the timing of the transition. New Nd isotope data from the southeastern Atlantic Ocean indicate that the initial transition to a bipolar mode of deep-water circulation occurred in the early Oligocene, ca. 33 Ma. The likely cause of significant deep-water production in the North Atlantic was tectonic deepening of the sill separating the Greenland-Norwegian Sea from the North Atlantic. |
format |
Dataset |
author |
Via, Rachael K Thomas, Deborah J |
author_facet |
Via, Rachael K Thomas, Deborah J |
author_sort |
Via, Rachael K |
title |
Nd isotope data for ODP Leg 208 holes |
title_short |
Nd isotope data for ODP Leg 208 holes |
title_full |
Nd isotope data for ODP Leg 208 holes |
title_fullStr |
Nd isotope data for ODP Leg 208 holes |
title_full_unstemmed |
Nd isotope data for ODP Leg 208 holes |
title_sort |
nd isotope data for odp leg 208 holes |
publisher |
PANGAEA |
publishDate |
2006 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.724682 https://doi.org/10.1594/PANGAEA.724682 |
op_coverage |
MEDIAN LATITUDE: -28.083837 * MEDIAN LONGITUDE: 2.400663 * SOUTH-BOUND LATITUDE: -28.532830 * WEST-BOUND LONGITUDE: 1.577000 * NORTH-BOUND LATITUDE: -27.186000 * EAST-BOUND LONGITUDE: 2.845510 * DATE/TIME START: 2003-03-24T13:00:00 * DATE/TIME END: 2003-04-06T21:55:00 |
long_lat |
ENVELOPE(1.577000,2.845510,-27.186000,-28.532830) |
geographic |
Southern Ocean Norwegian Sea Greenland |
geographic_facet |
Southern Ocean Norwegian Sea Greenland |
genre |
Greenland North Atlantic Deep Water North Atlantic Norwegian Sea Southern Ocean |
genre_facet |
Greenland North Atlantic Deep Water North Atlantic Norwegian Sea Southern Ocean |
op_source |
Supplement to: Via, Rachael K; Thomas, Deborah J (2006): Evolution of Atlantic thermohaline circulation: Early Oligocene onset of deep-water production in the North Atlantic. Geology 2006, 34(6), 441-444, https://doi.org/10.1130/G22545.1 |
op_relation |
Table DR1 - Walvis Ridge Nd isotope (URI: ftp://rock.geosociety.org/pub/reposit/2006/2006087.pdf) https://doi.pangaea.de/10.1594/PANGAEA.724682 https://doi.org/10.1594/PANGAEA.724682 |
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.724682 https://doi.org/10.1130/G22545.1 |
_version_ |
1766019696186884096 |