Cadmium analytical results from sediment and foraminifera shells
There has been a major contradiction between benthic foraminiferal Cd/Ca and d13C data concerning the labile nutrient chemistry of the Southern Ocean during the Last Glacial Maximum (LGM). Cd data indicates that LGM South Atlantic nutrient concentrations were as low as they are today, indicative of...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.807594 2024-09-15T18:19:01+00:00 Cadmium analytical results from sediment and foraminifera shells Boyle, Edward A Rosenthal, Yair MEDIAN LATITUDE: -11.296337 * MEDIAN LONGITUDE: -6.969537 * SOUTH-BOUND LATITUDE: -22.330000 * WEST-BOUND LONGITUDE: -83.966700 * NORTH-BOUND LATITUDE: 41.430000 * EAST-BOUND LONGITUDE: 11.198000 * DATE/TIME START: 1970-10-08T00:00:00 * DATE/TIME END: 1981-05-27T00:00:00 1996 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.807594 https://doi.org/10.1594/PANGAEA.807594 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.807594 https://doi.org/10.1594/PANGAEA.807594 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Boyle, Edward A; Rosenthal, Yair (1996): Chemical hydrography of the South Atlantic during the Last Glacial Maximum: Cd vs. d13C. In: Wefer, G; Berger, W H; Siedler, G & Webb, D (eds.), The South Atlantic: Present and Past Circulation, Springer, Berlin, Heidelberg, 423-443 SFB261 South Atlantic in Late Quaternary: Reconstruction of Budget and Currents dataset publication series 1996 ftpangaea https://doi.org/10.1594/PANGAEA.807594 2024-07-24T02:31:21Z There has been a major contradiction between benthic foraminiferal Cd/Ca and d13C data concerning the labile nutrient chemistry of the Southern Ocean during the Last Glacial Maximum (LGM). Cd data indicates that LGM South Atlantic nutrient concentrations were as low as they are today, indicative of a persistent influx of nutrient-depleted North Atlantic Deep Water (NADW). d13C data indicates that LGM South Atlantic nutrient concentrations were much higher than at present (even higher than anywhere else in the ocean at that time), and these data have been interpreted as signifying the complete shutdown ofthe export of NADW into the global ocean. This paper examines both true geochemical differences and various confounding foraminiferal artifacts for both tracers. While many different processes and artifacts affect both tracers in the margin, we conclude the discrepancy is mainly due to the "Mackensen Effect" of low foraminiferal d13C as a result of high carbon flux to the sediments, and that LGM Atlantic Sector Southern Ocean nutrient concentrations remained similar to the levels encountered today. Other/Unknown Material NADW North Atlantic Deep Water North Atlantic Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-83.966700,11.198000,41.430000,-22.330000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
SFB261 South Atlantic in Late Quaternary: Reconstruction of Budget and Currents |
spellingShingle |
SFB261 South Atlantic in Late Quaternary: Reconstruction of Budget and Currents Boyle, Edward A Rosenthal, Yair Cadmium analytical results from sediment and foraminifera shells |
topic_facet |
SFB261 South Atlantic in Late Quaternary: Reconstruction of Budget and Currents |
description |
There has been a major contradiction between benthic foraminiferal Cd/Ca and d13C data concerning the labile nutrient chemistry of the Southern Ocean during the Last Glacial Maximum (LGM). Cd data indicates that LGM South Atlantic nutrient concentrations were as low as they are today, indicative of a persistent influx of nutrient-depleted North Atlantic Deep Water (NADW). d13C data indicates that LGM South Atlantic nutrient concentrations were much higher than at present (even higher than anywhere else in the ocean at that time), and these data have been interpreted as signifying the complete shutdown ofthe export of NADW into the global ocean. This paper examines both true geochemical differences and various confounding foraminiferal artifacts for both tracers. While many different processes and artifacts affect both tracers in the margin, we conclude the discrepancy is mainly due to the "Mackensen Effect" of low foraminiferal d13C as a result of high carbon flux to the sediments, and that LGM Atlantic Sector Southern Ocean nutrient concentrations remained similar to the levels encountered today. |
format |
Other/Unknown Material |
author |
Boyle, Edward A Rosenthal, Yair |
author_facet |
Boyle, Edward A Rosenthal, Yair |
author_sort |
Boyle, Edward A |
title |
Cadmium analytical results from sediment and foraminifera shells |
title_short |
Cadmium analytical results from sediment and foraminifera shells |
title_full |
Cadmium analytical results from sediment and foraminifera shells |
title_fullStr |
Cadmium analytical results from sediment and foraminifera shells |
title_full_unstemmed |
Cadmium analytical results from sediment and foraminifera shells |
title_sort |
cadmium analytical results from sediment and foraminifera shells |
publisher |
PANGAEA |
publishDate |
1996 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.807594 https://doi.org/10.1594/PANGAEA.807594 |
op_coverage |
MEDIAN LATITUDE: -11.296337 * MEDIAN LONGITUDE: -6.969537 * SOUTH-BOUND LATITUDE: -22.330000 * WEST-BOUND LONGITUDE: -83.966700 * NORTH-BOUND LATITUDE: 41.430000 * EAST-BOUND LONGITUDE: 11.198000 * DATE/TIME START: 1970-10-08T00:00:00 * DATE/TIME END: 1981-05-27T00:00:00 |
long_lat |
ENVELOPE(-83.966700,11.198000,41.430000,-22.330000) |
genre |
NADW North Atlantic Deep Water North Atlantic Southern Ocean |
genre_facet |
NADW North Atlantic Deep Water North Atlantic Southern Ocean |
op_source |
Supplement to: Boyle, Edward A; Rosenthal, Yair (1996): Chemical hydrography of the South Atlantic during the Last Glacial Maximum: Cd vs. d13C. In: Wefer, G; Berger, W H; Siedler, G & Webb, D (eds.), The South Atlantic: Present and Past Circulation, Springer, Berlin, Heidelberg, 423-443 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.807594 https://doi.org/10.1594/PANGAEA.807594 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.807594 |
_version_ |
1810457110801022976 |