(Table 3) Abundances of total foraminifera counted from multinet plankton tows in the Drake Passage, ANT X/5, August-September, 1992, 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
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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PANGAEA - Data Publisher for Earth & Environmental Science
2000
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Online Access: | https://dx.doi.org/10.1594/pangaea.855511 https://doi.pangaea.de/10.1594/PANGAEA.855511 |
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ftdatacite:10.1594/pangaea.855511 2023-05-15T13:15:48+02:00 (Table 3) Abundances of total foraminifera counted from multinet plankton tows in the Drake Passage, ANT X/5, August-September, 1992, 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 Kohfeld, Karen E Anderson, Robert F Lynch-Stieglitz, Jean 2000 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.855511 https://doi.pangaea.de/10.1594/PANGAEA.855511 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://www.ncdc.noaa.gov/paleo/study/5813 https://dx.doi.org/10.1029/1999pa900049 https://www.ncdc.noaa.gov/paleo/study/5813 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Event label Latitude of event Longitude of event DEPTH, water Depth, top/min Depth, bottom/max Split Foraminifera, planktic Volume Comment Multiple opening/closing net ANT-X/5 Polarstern Dataset dataset Supplementary Dataset 2000 ftdatacite https://doi.org/10.1594/pangaea.855511 https://doi.org/10.1029/1999pa900049 2022-02-09T13:33:15Z 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. : Subsamples were collected from S. Schiel, Alfred-Wegener Institute, Bremerhaven, Germany, 1995, and counted at Lamont-Doherty Earth Observatory. Dataset Alfred Wegener Institute Drake Passage Neogloboquadrina pachyderma Planktonic foraminifera South Atlantic Ocean Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Southern Ocean Drake Passage Lynch ENVELOPE(-57.683,-57.683,-63.783,-63.783) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Event label Latitude of event Longitude of event DEPTH, water Depth, top/min Depth, bottom/max Split Foraminifera, planktic Volume Comment Multiple opening/closing net ANT-X/5 Polarstern |
spellingShingle |
Event label Latitude of event Longitude of event DEPTH, water Depth, top/min Depth, bottom/max Split Foraminifera, planktic Volume Comment Multiple opening/closing net ANT-X/5 Polarstern 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, 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 |
topic_facet |
Event label Latitude of event Longitude of event DEPTH, water Depth, top/min Depth, bottom/max Split Foraminifera, planktic Volume Comment Multiple opening/closing net ANT-X/5 Polarstern |
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. : Subsamples were collected from S. Schiel, Alfred-Wegener Institute, Bremerhaven, Germany, 1995, and counted at Lamont-Doherty Earth Observatory. |
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, 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 |
title_short |
(Table 3) Abundances of total foraminifera counted from multinet plankton tows in the Drake Passage, ANT X/5, August-September, 1992, 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 |
title_full |
(Table 3) Abundances of total foraminifera counted from multinet plankton tows in the Drake Passage, ANT X/5, August-September, 1992, 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 |
title_fullStr |
(Table 3) Abundances of total foraminifera counted from multinet plankton tows in the Drake Passage, ANT X/5, August-September, 1992, 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 |
title_full_unstemmed |
(Table 3) Abundances of total foraminifera counted from multinet plankton tows in the Drake Passage, ANT X/5, August-September, 1992, 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 |
title_sort |
(table 3) abundances of total foraminifera counted from multinet plankton tows in the drake passage, ant x/5, august-september, 1992, 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 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2000 |
url |
https://dx.doi.org/10.1594/pangaea.855511 https://doi.pangaea.de/10.1594/PANGAEA.855511 |
long_lat |
ENVELOPE(-57.683,-57.683,-63.783,-63.783) |
geographic |
Southern Ocean Drake Passage Lynch |
geographic_facet |
Southern Ocean Drake Passage Lynch |
genre |
Alfred Wegener Institute Drake Passage Neogloboquadrina pachyderma Planktonic foraminifera South Atlantic Ocean Southern Ocean |
genre_facet |
Alfred Wegener Institute Drake Passage Neogloboquadrina pachyderma Planktonic foraminifera South Atlantic Ocean Southern Ocean |
op_relation |
https://www.ncdc.noaa.gov/paleo/study/5813 https://dx.doi.org/10.1029/1999pa900049 https://www.ncdc.noaa.gov/paleo/study/5813 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.855511 https://doi.org/10.1029/1999pa900049 |
_version_ |
1766271107237675008 |