IRD, benthic foraminifera and stable isotopic record of northern Sargasso Sea sediments
New geochemical proxy data from Bermuda Rise piston cores reveal ocean and climate conditions in the northern Sargasso Sea during marine isotope stage 3. Using δ18O on the planktonic foraminifer Globigerinoides ruber, we can correlate explicitly with every stadial/interstadial change in Greenland ic...
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1999
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.856930 2023-05-15T13:44:47+02:00 IRD, benthic foraminifera and stable isotopic record of northern Sargasso Sea sediments Keigwin, Lloyd D Boyle, Edward A MEDIAN LATITUDE: 33.934528 * MEDIAN LONGITUDE: -57.623722 * SOUTH-BOUND LATITUDE: 33.690667 * WEST-BOUND LONGITUDE: -57.633300 * NORTH-BOUND LATITUDE: 33.983300 * EAST-BOUND LONGITUDE: -57.575833 * DATE/TIME START: 1995-06-29T00:00:00 * DATE/TIME END: 1995-06-29T00:00:00 1999-01-15 application/zip, 3 datasets https://doi.pangaea.de/10.1594/PANGAEA.856930 https://doi.org/10.1594/PANGAEA.856930 en eng PANGAEA Keigwin, Lloyd D; Boyle, Edward A (1999): NOAA/WDS Paleoclimatology - Sargasso Sea Stable Isotope and Cd/Ca Data. NOAA National Centers for Environmental Information, https://doi.org/10.25921/SNPH-NF26 https://doi.pangaea.de/10.1594/PANGAEA.856930 https://doi.org/10.1594/PANGAEA.856930 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Keigwin, Lloyd D; Boyle, Edward A (1999): Surface and deep ocean variability in the northern Sargasso Sea during marine isotope stage 3. Paleoceanography, 14(2), 164-170, https://doi.org/10.1029/1998PA900026 Dataset 1999 ftpangaea https://doi.org/10.1594/PANGAEA.856930 https://doi.org/10.1029/1998PA900026 https://doi.org/10.25921/SNPH-NF26 2023-01-20T07:33:39Z New geochemical proxy data from Bermuda Rise piston cores reveal ocean and climate conditions in the northern Sargasso Sea during marine isotope stage 3. Using δ18O on the planktonic foraminifer Globigerinoides ruber, we can correlate explicitly with every stadial/interstadial change in Greenland ice between ~32 and 58 ka. These data suggest repetitive changes of ~4°C in the annual average sea surface temperature (SST), with maximum cooling comparable to or greater than SST during glacial maximum conditions. The extent of SST depression is about the same for typical stadial events and for Heinrich events 4 and 5, which we have identified on the Bermuda Rise by traces of ice rafting. Benthic foraminiferal d13C decreases during every stadial event, consistent with reduced production of the deepest component of North Atlantic Deep Water and shoaling of its interface with Antarctic Bottom Water. This interpretation is supported by benthic Cd/Ca data from the climate cycle associated with interstadial 8. Dataset Antarc* Antarctic Greenland North Atlantic Deep Water North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science Antarctic Greenland ENVELOPE(-57.633300,-57.575833,33.983300,33.690667) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
description |
New geochemical proxy data from Bermuda Rise piston cores reveal ocean and climate conditions in the northern Sargasso Sea during marine isotope stage 3. Using δ18O on the planktonic foraminifer Globigerinoides ruber, we can correlate explicitly with every stadial/interstadial change in Greenland ice between ~32 and 58 ka. These data suggest repetitive changes of ~4°C in the annual average sea surface temperature (SST), with maximum cooling comparable to or greater than SST during glacial maximum conditions. The extent of SST depression is about the same for typical stadial events and for Heinrich events 4 and 5, which we have identified on the Bermuda Rise by traces of ice rafting. Benthic foraminiferal d13C decreases during every stadial event, consistent with reduced production of the deepest component of North Atlantic Deep Water and shoaling of its interface with Antarctic Bottom Water. This interpretation is supported by benthic Cd/Ca data from the climate cycle associated with interstadial 8. |
format |
Dataset |
author |
Keigwin, Lloyd D Boyle, Edward A |
spellingShingle |
Keigwin, Lloyd D Boyle, Edward A IRD, benthic foraminifera and stable isotopic record of northern Sargasso Sea sediments |
author_facet |
Keigwin, Lloyd D Boyle, Edward A |
author_sort |
Keigwin, Lloyd D |
title |
IRD, benthic foraminifera and stable isotopic record of northern Sargasso Sea sediments |
title_short |
IRD, benthic foraminifera and stable isotopic record of northern Sargasso Sea sediments |
title_full |
IRD, benthic foraminifera and stable isotopic record of northern Sargasso Sea sediments |
title_fullStr |
IRD, benthic foraminifera and stable isotopic record of northern Sargasso Sea sediments |
title_full_unstemmed |
IRD, benthic foraminifera and stable isotopic record of northern Sargasso Sea sediments |
title_sort |
ird, benthic foraminifera and stable isotopic record of northern sargasso sea sediments |
publisher |
PANGAEA |
publishDate |
1999 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.856930 https://doi.org/10.1594/PANGAEA.856930 |
op_coverage |
MEDIAN LATITUDE: 33.934528 * MEDIAN LONGITUDE: -57.623722 * SOUTH-BOUND LATITUDE: 33.690667 * WEST-BOUND LONGITUDE: -57.633300 * NORTH-BOUND LATITUDE: 33.983300 * EAST-BOUND LONGITUDE: -57.575833 * DATE/TIME START: 1995-06-29T00:00:00 * DATE/TIME END: 1995-06-29T00:00:00 |
long_lat |
ENVELOPE(-57.633300,-57.575833,33.983300,33.690667) |
geographic |
Antarctic Greenland |
geographic_facet |
Antarctic Greenland |
genre |
Antarc* Antarctic Greenland North Atlantic Deep Water North Atlantic |
genre_facet |
Antarc* Antarctic Greenland North Atlantic Deep Water North Atlantic |
op_source |
Supplement to: Keigwin, Lloyd D; Boyle, Edward A (1999): Surface and deep ocean variability in the northern Sargasso Sea during marine isotope stage 3. Paleoceanography, 14(2), 164-170, https://doi.org/10.1029/1998PA900026 |
op_relation |
Keigwin, Lloyd D; Boyle, Edward A (1999): NOAA/WDS Paleoclimatology - Sargasso Sea Stable Isotope and Cd/Ca Data. NOAA National Centers for Environmental Information, https://doi.org/10.25921/SNPH-NF26 https://doi.pangaea.de/10.1594/PANGAEA.856930 https://doi.org/10.1594/PANGAEA.856930 |
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.856930 https://doi.org/10.1029/1998PA900026 https://doi.org/10.25921/SNPH-NF26 |
_version_ |
1766206386294751232 |