Mid-Pliocene deep-sea bottom water temperatures based on ostracode Mg/Ca ratios
We studied magnesium:calcium (Mg/Ca) ratios in shells of the deep-sea ostracode genus Krithe from a short interval in the middle Pliocene between 3.29 and 2.97 Ma using deep-sea drilling sites in the North and South Atlantic in order to estimate bottom water temperatures (BWT) during a period of cli...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.684703 2023-05-15T17:27:53+02:00 Mid-Pliocene deep-sea bottom water temperatures based on ostracode Mg/Ca ratios Cronin, Thomas M Dowsett, Harry J Dwyer, Gary S Baker, Paul A Chandler, Mark A MEDIAN LATITUDE: 15.226522 * MEDIAN LONGITUDE: -4.977717 * SOUTH-BOUND LATITUDE: -46.879500 * WEST-BOUND LONGITUDE: -79.378300 * NORTH-BOUND LATITUDE: 56.042700 * EAST-BOUND LONGITUDE: 161.226700 * DATE/TIME START: 1979-08-16T00:00:00 * DATE/TIME END: 1987-05-03T00:00:00 2005-03-04 application/zip, 9 datasets https://doi.pangaea.de/10.1594/PANGAEA.684703 https://doi.org/10.1594/PANGAEA.684703 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.684703 https://doi.org/10.1594/PANGAEA.684703 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Cronin, Thomas M; Dowsett, Harry J; Dwyer, Gary S; Baker, Paul A; Chandler, Mark A (2005): Mid-Pliocene deep-sea bottom-water temperatures based on ostracode Mg/Ca ratios. Marine Micropaleontology, 54(3-4), 249-261, https://doi.org/10.1016/j.marmicro.2004.12.003 108-658A 108-659A 108-661A 114-704 68-502C 81-552A 90-588 94-607 94-610A Canarias Sea Caribbean Sea/RIDGE COMPCORE Composite Core DRILL Drilling/drill rig Glomar Challenger Joides Resolution Leg108 Leg114 Leg68 Leg81 Leg90 Leg94 North Atlantic/FLANK North Atlantic/PLATEAU North Atlantic/RIDGE North Atlantic Ocean Ocean Drilling Program ODP South Atlantic Ocean South Pacific/Tasman Sea/CONT RISE Dataset 2005 ftpangaea https://doi.org/10.1594/PANGAEA.684703 https://doi.org/10.1016/j.marmicro.2004.12.003 2023-01-20T07:31:08Z We studied magnesium:calcium (Mg/Ca) ratios in shells of the deep-sea ostracode genus Krithe from a short interval in the middle Pliocene between 3.29 and 2.97 Ma using deep-sea drilling sites in the North and South Atlantic in order to estimate bottom water temperatures (BWT) during a period of climatic warmth. Results from DSDP and ODP Sites 552A, 610A, 607, 658A, 659A, 661A and 704 for the period Ma reveal both depth and latitudinal gradients of mean Mg/Ca values. Shallower sites (552A, 610A and 607) have higher mean Mg/Ca ratios (10.3, 9.7, 10.1 mmol/mol) than deeper sites (661A, 6.3 mmol/mol), and high latitude North Atlantic sites (552A, 610 and 607) have higher Mg/Ca ratios than low latitude (658A: 9.8 mmol/mol, 659A: 7.7 mmol/mol, 661A: 6.3 mmol/mol) and Southern Ocean (704: 8.0 mmol/mol) sites. Converting Mg/Ca ratios into estimated temperatures using the calibration of Dwyer et al. (1995) [Dwyer, G.S., Cronin, T.M., Baker, P.A., Raymo, M.E., Buzas, J.S., Corrège, T., 1995. North Atlantic deepwater temperature change during late Pliocene and late Quaternary climatic cycles. Science 270, 1347–1351] suggests that mean middle Pliocene bottom water temperatures at the study sites in the deep Atlantic were about the same as modern temperatures. However, brief pulses of elevated BWT occurred several times between 3.29 and 2.97 Ma in both the North and South Atlantic Ocean suggesting short-term changes in deep ocean circulation. Dataset North Atlantic South Atlantic Ocean Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Southern Ocean Pacific Dwyer ENVELOPE(65.050,65.050,-70.183,-70.183) ENVELOPE(-79.378300,161.226700,56.042700,-46.879500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
108-658A 108-659A 108-661A 114-704 68-502C 81-552A 90-588 94-607 94-610A Canarias Sea Caribbean Sea/RIDGE COMPCORE Composite Core DRILL Drilling/drill rig Glomar Challenger Joides Resolution Leg108 Leg114 Leg68 Leg81 Leg90 Leg94 North Atlantic/FLANK North Atlantic/PLATEAU North Atlantic/RIDGE North Atlantic Ocean Ocean Drilling Program ODP South Atlantic Ocean South Pacific/Tasman Sea/CONT RISE |
spellingShingle |
108-658A 108-659A 108-661A 114-704 68-502C 81-552A 90-588 94-607 94-610A Canarias Sea Caribbean Sea/RIDGE COMPCORE Composite Core DRILL Drilling/drill rig Glomar Challenger Joides Resolution Leg108 Leg114 Leg68 Leg81 Leg90 Leg94 North Atlantic/FLANK North Atlantic/PLATEAU North Atlantic/RIDGE North Atlantic Ocean Ocean Drilling Program ODP South Atlantic Ocean South Pacific/Tasman Sea/CONT RISE Cronin, Thomas M Dowsett, Harry J Dwyer, Gary S Baker, Paul A Chandler, Mark A Mid-Pliocene deep-sea bottom water temperatures based on ostracode Mg/Ca ratios |
topic_facet |
108-658A 108-659A 108-661A 114-704 68-502C 81-552A 90-588 94-607 94-610A Canarias Sea Caribbean Sea/RIDGE COMPCORE Composite Core DRILL Drilling/drill rig Glomar Challenger Joides Resolution Leg108 Leg114 Leg68 Leg81 Leg90 Leg94 North Atlantic/FLANK North Atlantic/PLATEAU North Atlantic/RIDGE North Atlantic Ocean Ocean Drilling Program ODP South Atlantic Ocean South Pacific/Tasman Sea/CONT RISE |
description |
We studied magnesium:calcium (Mg/Ca) ratios in shells of the deep-sea ostracode genus Krithe from a short interval in the middle Pliocene between 3.29 and 2.97 Ma using deep-sea drilling sites in the North and South Atlantic in order to estimate bottom water temperatures (BWT) during a period of climatic warmth. Results from DSDP and ODP Sites 552A, 610A, 607, 658A, 659A, 661A and 704 for the period Ma reveal both depth and latitudinal gradients of mean Mg/Ca values. Shallower sites (552A, 610A and 607) have higher mean Mg/Ca ratios (10.3, 9.7, 10.1 mmol/mol) than deeper sites (661A, 6.3 mmol/mol), and high latitude North Atlantic sites (552A, 610 and 607) have higher Mg/Ca ratios than low latitude (658A: 9.8 mmol/mol, 659A: 7.7 mmol/mol, 661A: 6.3 mmol/mol) and Southern Ocean (704: 8.0 mmol/mol) sites. Converting Mg/Ca ratios into estimated temperatures using the calibration of Dwyer et al. (1995) [Dwyer, G.S., Cronin, T.M., Baker, P.A., Raymo, M.E., Buzas, J.S., Corrège, T., 1995. North Atlantic deepwater temperature change during late Pliocene and late Quaternary climatic cycles. Science 270, 1347–1351] suggests that mean middle Pliocene bottom water temperatures at the study sites in the deep Atlantic were about the same as modern temperatures. However, brief pulses of elevated BWT occurred several times between 3.29 and 2.97 Ma in both the North and South Atlantic Ocean suggesting short-term changes in deep ocean circulation. |
format |
Dataset |
author |
Cronin, Thomas M Dowsett, Harry J Dwyer, Gary S Baker, Paul A Chandler, Mark A |
author_facet |
Cronin, Thomas M Dowsett, Harry J Dwyer, Gary S Baker, Paul A Chandler, Mark A |
author_sort |
Cronin, Thomas M |
title |
Mid-Pliocene deep-sea bottom water temperatures based on ostracode Mg/Ca ratios |
title_short |
Mid-Pliocene deep-sea bottom water temperatures based on ostracode Mg/Ca ratios |
title_full |
Mid-Pliocene deep-sea bottom water temperatures based on ostracode Mg/Ca ratios |
title_fullStr |
Mid-Pliocene deep-sea bottom water temperatures based on ostracode Mg/Ca ratios |
title_full_unstemmed |
Mid-Pliocene deep-sea bottom water temperatures based on ostracode Mg/Ca ratios |
title_sort |
mid-pliocene deep-sea bottom water temperatures based on ostracode mg/ca ratios |
publisher |
PANGAEA |
publishDate |
2005 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.684703 https://doi.org/10.1594/PANGAEA.684703 |
op_coverage |
MEDIAN LATITUDE: 15.226522 * MEDIAN LONGITUDE: -4.977717 * SOUTH-BOUND LATITUDE: -46.879500 * WEST-BOUND LONGITUDE: -79.378300 * NORTH-BOUND LATITUDE: 56.042700 * EAST-BOUND LONGITUDE: 161.226700 * DATE/TIME START: 1979-08-16T00:00:00 * DATE/TIME END: 1987-05-03T00:00:00 |
long_lat |
ENVELOPE(65.050,65.050,-70.183,-70.183) ENVELOPE(-79.378300,161.226700,56.042700,-46.879500) |
geographic |
Southern Ocean Pacific Dwyer |
geographic_facet |
Southern Ocean Pacific Dwyer |
genre |
North Atlantic South Atlantic Ocean Southern Ocean |
genre_facet |
North Atlantic South Atlantic Ocean Southern Ocean |
op_source |
Supplement to: Cronin, Thomas M; Dowsett, Harry J; Dwyer, Gary S; Baker, Paul A; Chandler, Mark A (2005): Mid-Pliocene deep-sea bottom-water temperatures based on ostracode Mg/Ca ratios. Marine Micropaleontology, 54(3-4), 249-261, https://doi.org/10.1016/j.marmicro.2004.12.003 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.684703 https://doi.org/10.1594/PANGAEA.684703 |
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.684703 https://doi.org/10.1016/j.marmicro.2004.12.003 |
_version_ |
1766120213644836864 |