Stable carbon and oxygen isotope record of foraminifera of IODP Site 303-1307
A major tipping point of Earth's history occurred during the mid-Pliocene: the onset of major Northern-Hemisphere Glaciation (NHG) and of pronounced, Quaternary-style cycles of glacial-to-interglacial climates, that contrast with more uniform climates over most of the preceding Cenozoic and con...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.841136 2023-05-15T13:11:55+02:00 Stable carbon and oxygen isotope record of foraminifera of IODP Site 303-1307 Sarnthein, Michael Bartoli, Gretta Prange, Matthias Schmittner, Andreas Schneider, Birgit Weinelt, Mara Andersen, Nils Garbe-Schönberg, Dieter MEDIAN LATITUDE: 58.505875 * MEDIAN LONGITUDE: -46.400725 * SOUTH-BOUND LATITUDE: 58.505783 * WEST-BOUND LONGITUDE: -46.400900 * NORTH-BOUND LATITUDE: 58.505967 * EAST-BOUND LONGITUDE: -46.400550 2009-01-05 application/zip, 7 datasets https://doi.pangaea.de/10.1594/PANGAEA.841136 https://doi.org/10.1594/PANGAEA.841136 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.841136 https://doi.org/10.1594/PANGAEA.841136 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Sarnthein, Michael; Bartoli, Gretta; Prange, Matthias; Schmittner, Andreas; Schneider, Birgit; Weinelt, Mara; Andersen, Nils; Garbe-Schönberg, Dieter (2009): Mid-Pliocene shifts in ocean overturning circulation and the onset of Quaternary-style climates. Climate of the Past, 5, 269-283, https://doi.org/10.5194/cp-5-269-2009 Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Dataset 2009 ftpangaea https://doi.org/10.1594/PANGAEA.841136 https://doi.org/10.5194/cp-5-269-2009 2023-01-20T07:33:24Z A major tipping point of Earth's history occurred during the mid-Pliocene: the onset of major Northern-Hemisphere Glaciation (NHG) and of pronounced, Quaternary-style cycles of glacial-to-interglacial climates, that contrast with more uniform climates over most of the preceding Cenozoic and continue until today (Zachos et al., 2001, doi:10.1126/science.1059412). The severe deterioration of climate occurred in three steps between 3.2 Ma (warm MIS K3) and 2.7 Ma (glacial MIS G6/4) (Lisiecki and Raymo, 2005, doi:10.1029/2004PA001071). Various models (sensu Driscoll and Haug, 1998, doi:10.1126/science.282.5388.436) and paleoceanographic records (intercalibrated using orbital age control) suggest clear linkages between the onset of NHG and the three steps in the final closure of the Central American Seaways (CAS), deduced from rising salinity differences between Caribbean and the East Pacific. Each closing event led to an enhanced North Atlantic meridional overturning circulation and this strengthened the poleward transport of salt and heat (warmings of +2-3°C) (Bartoli et al., 2005, doi:10.1016/j.epsl.2005.06.020). Also, the closing resulted in a slight rise in the poleward atmospheric moisture transport to northwestern Eurasia (Lunt et al., 2007, doi:10.1007/s00382-007-0265-6), which probably led to an enhanced precipitation and fluvial run-off, lower sea surface salinity (SSS), and an increased sea-ice cover in the Arctic Ocean, hence promoting albedo and the build-up of continental ice sheets. Most important, new evidence shows that the closing of the CAS led to greater steric height of the North Pacific and thus doubled the low-saline Arctic Throughflow from the Bering Strait to the East Greenland Current (EGC). Accordingly, Labrador Sea IODP Site 1307 displays an abrupt but irreversible EGC cooling of 6°C and freshening by ~2 psu from 3.25/3.16-3.00 Ma, right after the first but still reversible attempt of closing the CAS. Dataset albedo Arctic Arctic Ocean Bering Strait East Greenland east greenland current Foraminifera* Greenland Labrador Sea North Atlantic Sea ice PANGAEA - Data Publisher for Earth & Environmental Science Arctic Arctic Ocean Bering Strait Greenland Pacific Haug ENVELOPE(15.188,15.188,67.918,67.918) ENVELOPE(-46.400900,-46.400550,58.505967,58.505783) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP |
spellingShingle |
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP Sarnthein, Michael Bartoli, Gretta Prange, Matthias Schmittner, Andreas Schneider, Birgit Weinelt, Mara Andersen, Nils Garbe-Schönberg, Dieter Stable carbon and oxygen isotope record of foraminifera of IODP Site 303-1307 |
topic_facet |
Integrated Ocean Drilling Program / International Ocean Discovery Program IODP |
description |
A major tipping point of Earth's history occurred during the mid-Pliocene: the onset of major Northern-Hemisphere Glaciation (NHG) and of pronounced, Quaternary-style cycles of glacial-to-interglacial climates, that contrast with more uniform climates over most of the preceding Cenozoic and continue until today (Zachos et al., 2001, doi:10.1126/science.1059412). The severe deterioration of climate occurred in three steps between 3.2 Ma (warm MIS K3) and 2.7 Ma (glacial MIS G6/4) (Lisiecki and Raymo, 2005, doi:10.1029/2004PA001071). Various models (sensu Driscoll and Haug, 1998, doi:10.1126/science.282.5388.436) and paleoceanographic records (intercalibrated using orbital age control) suggest clear linkages between the onset of NHG and the three steps in the final closure of the Central American Seaways (CAS), deduced from rising salinity differences between Caribbean and the East Pacific. Each closing event led to an enhanced North Atlantic meridional overturning circulation and this strengthened the poleward transport of salt and heat (warmings of +2-3°C) (Bartoli et al., 2005, doi:10.1016/j.epsl.2005.06.020). Also, the closing resulted in a slight rise in the poleward atmospheric moisture transport to northwestern Eurasia (Lunt et al., 2007, doi:10.1007/s00382-007-0265-6), which probably led to an enhanced precipitation and fluvial run-off, lower sea surface salinity (SSS), and an increased sea-ice cover in the Arctic Ocean, hence promoting albedo and the build-up of continental ice sheets. Most important, new evidence shows that the closing of the CAS led to greater steric height of the North Pacific and thus doubled the low-saline Arctic Throughflow from the Bering Strait to the East Greenland Current (EGC). Accordingly, Labrador Sea IODP Site 1307 displays an abrupt but irreversible EGC cooling of 6°C and freshening by ~2 psu from 3.25/3.16-3.00 Ma, right after the first but still reversible attempt of closing the CAS. |
format |
Dataset |
author |
Sarnthein, Michael Bartoli, Gretta Prange, Matthias Schmittner, Andreas Schneider, Birgit Weinelt, Mara Andersen, Nils Garbe-Schönberg, Dieter |
author_facet |
Sarnthein, Michael Bartoli, Gretta Prange, Matthias Schmittner, Andreas Schneider, Birgit Weinelt, Mara Andersen, Nils Garbe-Schönberg, Dieter |
author_sort |
Sarnthein, Michael |
title |
Stable carbon and oxygen isotope record of foraminifera of IODP Site 303-1307 |
title_short |
Stable carbon and oxygen isotope record of foraminifera of IODP Site 303-1307 |
title_full |
Stable carbon and oxygen isotope record of foraminifera of IODP Site 303-1307 |
title_fullStr |
Stable carbon and oxygen isotope record of foraminifera of IODP Site 303-1307 |
title_full_unstemmed |
Stable carbon and oxygen isotope record of foraminifera of IODP Site 303-1307 |
title_sort |
stable carbon and oxygen isotope record of foraminifera of iodp site 303-1307 |
publisher |
PANGAEA |
publishDate |
2009 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.841136 https://doi.org/10.1594/PANGAEA.841136 |
op_coverage |
MEDIAN LATITUDE: 58.505875 * MEDIAN LONGITUDE: -46.400725 * SOUTH-BOUND LATITUDE: 58.505783 * WEST-BOUND LONGITUDE: -46.400900 * NORTH-BOUND LATITUDE: 58.505967 * EAST-BOUND LONGITUDE: -46.400550 |
long_lat |
ENVELOPE(15.188,15.188,67.918,67.918) ENVELOPE(-46.400900,-46.400550,58.505967,58.505783) |
geographic |
Arctic Arctic Ocean Bering Strait Greenland Pacific Haug |
geographic_facet |
Arctic Arctic Ocean Bering Strait Greenland Pacific Haug |
genre |
albedo Arctic Arctic Ocean Bering Strait East Greenland east greenland current Foraminifera* Greenland Labrador Sea North Atlantic Sea ice |
genre_facet |
albedo Arctic Arctic Ocean Bering Strait East Greenland east greenland current Foraminifera* Greenland Labrador Sea North Atlantic Sea ice |
op_source |
Supplement to: Sarnthein, Michael; Bartoli, Gretta; Prange, Matthias; Schmittner, Andreas; Schneider, Birgit; Weinelt, Mara; Andersen, Nils; Garbe-Schönberg, Dieter (2009): Mid-Pliocene shifts in ocean overturning circulation and the onset of Quaternary-style climates. Climate of the Past, 5, 269-283, https://doi.org/10.5194/cp-5-269-2009 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.841136 https://doi.org/10.1594/PANGAEA.841136 |
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.841136 https://doi.org/10.5194/cp-5-269-2009 |
_version_ |
1766249482612113408 |