(Table 3) Abundances of total foraminifera counted from multinet plankton tows in the Drake Passage, ANT X/5, August-September, 1992
Calibration studies of Neogloboquadrina pachyderma (sinistral coiling, hereinafter referred to as N. pachyderma (s.)) in the South Atlantic raise questions about the interpretation of this species' carbon isotope composition as a paleoceanographic tracer of Southern Ocean surface nutrient conte...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.855511 2023-05-15T16:02:35+02:00 (Table 3) Abundances of total foraminifera counted from multinet plankton tows in the Drake Passage, ANT X/5, August-September, 1992 Kohfeld, Karen E Anderson, Robert F Lynch-Stieglitz, Jean MEDIAN LATITUDE: -56.833146 * MEDIAN LONGITUDE: -50.885452 * SOUTH-BOUND LATITUDE: -60.298167 * WEST-BOUND LONGITUDE: -58.985117 * NORTH-BOUND LATITUDE: -53.603667 * EAST-BOUND LONGITUDE: -28.470500 * DATE/TIME START: 1992-09-05T11:32:00 * DATE/TIME END: 1992-09-22T21:33:00 * MINIMUM DEPTH, water: 25 m * MAXIMUM DEPTH, water: 750 m 2000-12-02 text/tab-separated-values, 282 data points https://doi.pangaea.de/10.1594/PANGAEA.855511 https://doi.org/10.1594/PANGAEA.855511 en eng PANGAEA Kohfeld, Karen E; Anderson, Robert F; Lynch-Stieglitz, Jean (2003): NOAA/WDS Paleoclimatology - Kohfeld et al 2000 S.Atlantic N.pachyderma Isotope and Abundance Data. NOAA National Centers for Environmental Information, https://doi.org/10.25921/A65M-KP40 https://doi.pangaea.de/10.1594/PANGAEA.855511 https://doi.org/10.1594/PANGAEA.855511 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Kohfeld, Karen E; Anderson, Robert F; Lynch-Stieglitz, Jean (2000): Carbon isotopic disequilibrium in polar planktonic foraminifera and its impact on modern and Last Glacial Maximum reconstructions. Paleoceanography, 15(1), 53-64, https://doi.org/10.1029/1999PA900049 22.837 ANT-X/5 Comment Depth bottom/max top/min water Event label Foraminifera planktic Latitude of event Longitude of event MSN Multiple opening/closing net Polarstern PS22/791 PS22/820 PS22/831 PS22/834 PS22/840 PS22/843 PS22/852 PS22 06AQANTX_5 PS2293-5 PS2322-1 PS2332-1 PS2335-1 PS2338-2 PS2341-2 PS2344-1 PS2353-1 South Atlantic Ocean Split Volume Dataset 2000 ftpangaea https://doi.org/10.1594/PANGAEA.855511 https://doi.org/10.1029/1999PA900049 https://doi.org/10.25921/A65M-KP40 2023-01-20T09:06:35Z Calibration studies of Neogloboquadrina pachyderma (sinistral coiling, hereinafter referred to as N. pachyderma (s.)) in the South Atlantic raise questions about the interpretation of this species' carbon isotope composition as a paleoceanographic tracer of Southern Ocean surface nutrient contents. Carbon isotope disequilibrium between d13C of total CO2 (TCO2) of seawater and d13C of N. pachyderma (s.) increases systematically between 70° and 40°S. Several effects could cause the observed carbon isotope disequilibrium, including a combination of foraminiferal diet, calcification temperature, and carbonate ion chemistry. Combining these corrections to the d13C of N. pachyderma (s.) improves the reconstruction of the d13C of seawater TCO2 between 0 and 200 m in the modern South Atlantic. With these corrections applied, the d13C for equilibrium calcite reconstructed from N. pachyderma (s.) at the Last Glacial Maximum is very similar to preindustrial values, suggesting that one cannot rule out the possibility that surface nutrient concentrations in the South Atlantic Ocean were comparable to today. However, the magnitude of the uncertainties associated with these corrections make it difficult to assess absolute paleonutrient concentrations with much confidence. Dataset Drake Passage Neogloboquadrina pachyderma South Atlantic Ocean Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science Drake Passage Southern Ocean ENVELOPE(-58.985117,-28.470500,-53.603667,-60.298167) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
22.837 ANT-X/5 Comment Depth bottom/max top/min water Event label Foraminifera planktic Latitude of event Longitude of event MSN Multiple opening/closing net Polarstern PS22/791 PS22/820 PS22/831 PS22/834 PS22/840 PS22/843 PS22/852 PS22 06AQANTX_5 PS2293-5 PS2322-1 PS2332-1 PS2335-1 PS2338-2 PS2341-2 PS2344-1 PS2353-1 South Atlantic Ocean Split Volume |
spellingShingle |
22.837 ANT-X/5 Comment Depth bottom/max top/min water Event label Foraminifera planktic Latitude of event Longitude of event MSN Multiple opening/closing net Polarstern PS22/791 PS22/820 PS22/831 PS22/834 PS22/840 PS22/843 PS22/852 PS22 06AQANTX_5 PS2293-5 PS2322-1 PS2332-1 PS2335-1 PS2338-2 PS2341-2 PS2344-1 PS2353-1 South Atlantic Ocean Split Volume Kohfeld, Karen E Anderson, Robert F Lynch-Stieglitz, Jean (Table 3) Abundances of total foraminifera counted from multinet plankton tows in the Drake Passage, ANT X/5, August-September, 1992 |
topic_facet |
22.837 ANT-X/5 Comment Depth bottom/max top/min water Event label Foraminifera planktic Latitude of event Longitude of event MSN Multiple opening/closing net Polarstern PS22/791 PS22/820 PS22/831 PS22/834 PS22/840 PS22/843 PS22/852 PS22 06AQANTX_5 PS2293-5 PS2322-1 PS2332-1 PS2335-1 PS2338-2 PS2341-2 PS2344-1 PS2353-1 South Atlantic Ocean Split Volume |
description |
Calibration studies of Neogloboquadrina pachyderma (sinistral coiling, hereinafter referred to as N. pachyderma (s.)) in the South Atlantic raise questions about the interpretation of this species' carbon isotope composition as a paleoceanographic tracer of Southern Ocean surface nutrient contents. Carbon isotope disequilibrium between d13C of total CO2 (TCO2) of seawater and d13C of N. pachyderma (s.) increases systematically between 70° and 40°S. Several effects could cause the observed carbon isotope disequilibrium, including a combination of foraminiferal diet, calcification temperature, and carbonate ion chemistry. Combining these corrections to the d13C of N. pachyderma (s.) improves the reconstruction of the d13C of seawater TCO2 between 0 and 200 m in the modern South Atlantic. With these corrections applied, the d13C for equilibrium calcite reconstructed from N. pachyderma (s.) at the Last Glacial Maximum is very similar to preindustrial values, suggesting that one cannot rule out the possibility that surface nutrient concentrations in the South Atlantic Ocean were comparable to today. However, the magnitude of the uncertainties associated with these corrections make it difficult to assess absolute paleonutrient concentrations with much confidence. |
format |
Dataset |
author |
Kohfeld, Karen E Anderson, Robert F Lynch-Stieglitz, Jean |
author_facet |
Kohfeld, Karen E Anderson, Robert F Lynch-Stieglitz, Jean |
author_sort |
Kohfeld, Karen E |
title |
(Table 3) Abundances of total foraminifera counted from multinet plankton tows in the Drake Passage, ANT X/5, August-September, 1992 |
title_short |
(Table 3) Abundances of total foraminifera counted from multinet plankton tows in the Drake Passage, ANT X/5, August-September, 1992 |
title_full |
(Table 3) Abundances of total foraminifera counted from multinet plankton tows in the Drake Passage, ANT X/5, August-September, 1992 |
title_fullStr |
(Table 3) Abundances of total foraminifera counted from multinet plankton tows in the Drake Passage, ANT X/5, August-September, 1992 |
title_full_unstemmed |
(Table 3) Abundances of total foraminifera counted from multinet plankton tows in the Drake Passage, ANT X/5, August-September, 1992 |
title_sort |
(table 3) abundances of total foraminifera counted from multinet plankton tows in the drake passage, ant x/5, august-september, 1992 |
publisher |
PANGAEA |
publishDate |
2000 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.855511 https://doi.org/10.1594/PANGAEA.855511 |
op_coverage |
MEDIAN LATITUDE: -56.833146 * MEDIAN LONGITUDE: -50.885452 * SOUTH-BOUND LATITUDE: -60.298167 * WEST-BOUND LONGITUDE: -58.985117 * NORTH-BOUND LATITUDE: -53.603667 * EAST-BOUND LONGITUDE: -28.470500 * DATE/TIME START: 1992-09-05T11:32:00 * DATE/TIME END: 1992-09-22T21:33:00 * MINIMUM DEPTH, water: 25 m * MAXIMUM DEPTH, water: 750 m |
long_lat |
ENVELOPE(-58.985117,-28.470500,-53.603667,-60.298167) |
geographic |
Drake Passage Southern Ocean |
geographic_facet |
Drake Passage Southern Ocean |
genre |
Drake Passage Neogloboquadrina pachyderma South Atlantic Ocean Southern Ocean |
genre_facet |
Drake Passage Neogloboquadrina pachyderma South Atlantic Ocean Southern Ocean |
op_source |
Supplement to: Kohfeld, Karen E; Anderson, Robert F; Lynch-Stieglitz, Jean (2000): Carbon isotopic disequilibrium in polar planktonic foraminifera and its impact on modern and Last Glacial Maximum reconstructions. Paleoceanography, 15(1), 53-64, https://doi.org/10.1029/1999PA900049 |
op_relation |
Kohfeld, Karen E; Anderson, Robert F; Lynch-Stieglitz, Jean (2003): NOAA/WDS Paleoclimatology - Kohfeld et al 2000 S.Atlantic N.pachyderma Isotope and Abundance Data. NOAA National Centers for Environmental Information, https://doi.org/10.25921/A65M-KP40 https://doi.pangaea.de/10.1594/PANGAEA.855511 https://doi.org/10.1594/PANGAEA.855511 |
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.855511 https://doi.org/10.1029/1999PA900049 https://doi.org/10.25921/A65M-KP40 |
_version_ |
1766398244786536448 |