Planktonic foraminiferal δ13C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect
The carbon isotopic composition is measured for three species of planktonic foraminifera (Globigerina bulloides, Globorotalia inflata and Neogloboquadrina pachyderma (s.)) from Southern Ocean sediment traps. The sediment traps represent the annual flux of foraminifera in Subtropical to Polar Frontal...
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Online Access: | https://eprints.utas.edu.au/6250/ https://eprints.utas.edu.au/6250/1/king%26howard_GBC_04.pdf https://doi.org/10.1029/2003GB002162 |
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ftunivtasmania:oai:eprints.utas.edu.au:6250 2023-05-15T17:14:58+02:00 Planktonic foraminiferal δ13C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect King, AL Howard, WR 2004-06 application/pdf https://eprints.utas.edu.au/6250/ https://eprints.utas.edu.au/6250/1/king%26howard_GBC_04.pdf https://doi.org/10.1029/2003GB002162 en eng https://eprints.utas.edu.au/6250/1/king%26howard_GBC_04.pdf King, AL and Howard, WR 2004 , 'Planktonic foraminiferal δ13C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect' , Global Biogeochemical Cycles, vol. 18, no. 2 , GB2007 , doi:10.1029/2003GB002162 <http://dx.doi.org/10.1029/2003GB002162>. cc_utas 260399 Geochemistry not elsewhere classified 260499 Oceanography not elsewhere classified 260402 Chemical Oceanography carbon isotopes Southern Ocean sediment traps planktonic foraminifera disequilibrium seasonal variability Article PeerReviewed 2004 ftunivtasmania https://doi.org/10.1029/2003GB002162 2020-05-30T07:20:08Z The carbon isotopic composition is measured for three species of planktonic foraminifera (Globigerina bulloides, Globorotalia inflata and Neogloboquadrina pachyderma (s.)) from Southern Ocean sediment traps. The sediment traps represent the annual flux of foraminifera in Subtropical to Polar Frontal environments from the western Pacific/Southern Australia sector. Comparison between the seasonal δ13C composition of the foraminifera and estimated δ13C of dissolved inorganic carbon (DIC) allows disequilibrium effects to be determined. Disequilibrium exhibits a latitudinal trend, with greatest offsets from equilibrium at lower latitudes. This effect causes a north to south increase in foraminiferal δ13C, while the δ13CDIC displays a decrease across these latitudes. Disequilibrium in G. bulloides can be accounted for by changes in temperature. The relationship between disequilibrium and temperature which we derive in this field study is consistent with the laboratory relationship of Bemis et al. [2000] . Corrected δ13C for G. bulloides is closely correlated to seasonal changes in nutrients at each site, indicating the utility of G. bulloides δ13C as a nutrient tracer in Southern Ocean environments. Comparison between flux-weighted sediment trap values and nearby core tops indicates a modern depletion in δ13C, which we attribute to the oceanic Suess effect. The imprint of this effect on the foraminiferal isotopes provides further evidence for the equilibration between surface waters and the atmosphere in the Subantarctic Zone. Article in Journal/Newspaper Neogloboquadrina pachyderma Planktonic foraminifera Southern Ocean University of Tasmania: UTas ePrints Southern Ocean Pacific Global Biogeochemical Cycles 18 2 n/a n/a |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
260399 Geochemistry not elsewhere classified 260499 Oceanography not elsewhere classified 260402 Chemical Oceanography carbon isotopes Southern Ocean sediment traps planktonic foraminifera disequilibrium seasonal variability |
spellingShingle |
260399 Geochemistry not elsewhere classified 260499 Oceanography not elsewhere classified 260402 Chemical Oceanography carbon isotopes Southern Ocean sediment traps planktonic foraminifera disequilibrium seasonal variability King, AL Howard, WR Planktonic foraminiferal δ13C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect |
topic_facet |
260399 Geochemistry not elsewhere classified 260499 Oceanography not elsewhere classified 260402 Chemical Oceanography carbon isotopes Southern Ocean sediment traps planktonic foraminifera disequilibrium seasonal variability |
description |
The carbon isotopic composition is measured for three species of planktonic foraminifera (Globigerina bulloides, Globorotalia inflata and Neogloboquadrina pachyderma (s.)) from Southern Ocean sediment traps. The sediment traps represent the annual flux of foraminifera in Subtropical to Polar Frontal environments from the western Pacific/Southern Australia sector. Comparison between the seasonal δ13C composition of the foraminifera and estimated δ13C of dissolved inorganic carbon (DIC) allows disequilibrium effects to be determined. Disequilibrium exhibits a latitudinal trend, with greatest offsets from equilibrium at lower latitudes. This effect causes a north to south increase in foraminiferal δ13C, while the δ13CDIC displays a decrease across these latitudes. Disequilibrium in G. bulloides can be accounted for by changes in temperature. The relationship between disequilibrium and temperature which we derive in this field study is consistent with the laboratory relationship of Bemis et al. [2000] . Corrected δ13C for G. bulloides is closely correlated to seasonal changes in nutrients at each site, indicating the utility of G. bulloides δ13C as a nutrient tracer in Southern Ocean environments. Comparison between flux-weighted sediment trap values and nearby core tops indicates a modern depletion in δ13C, which we attribute to the oceanic Suess effect. The imprint of this effect on the foraminiferal isotopes provides further evidence for the equilibration between surface waters and the atmosphere in the Subantarctic Zone. |
format |
Article in Journal/Newspaper |
author |
King, AL Howard, WR |
author_facet |
King, AL Howard, WR |
author_sort |
King, AL |
title |
Planktonic foraminiferal δ13C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect |
title_short |
Planktonic foraminiferal δ13C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect |
title_full |
Planktonic foraminiferal δ13C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect |
title_fullStr |
Planktonic foraminiferal δ13C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect |
title_full_unstemmed |
Planktonic foraminiferal δ13C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect |
title_sort |
planktonic foraminiferal δ13c records from southern ocean sediment traps: new estimates of the oceanic suess effect |
publishDate |
2004 |
url |
https://eprints.utas.edu.au/6250/ https://eprints.utas.edu.au/6250/1/king%26howard_GBC_04.pdf https://doi.org/10.1029/2003GB002162 |
geographic |
Southern Ocean Pacific |
geographic_facet |
Southern Ocean Pacific |
genre |
Neogloboquadrina pachyderma Planktonic foraminifera Southern Ocean |
genre_facet |
Neogloboquadrina pachyderma Planktonic foraminifera Southern Ocean |
op_relation |
https://eprints.utas.edu.au/6250/1/king%26howard_GBC_04.pdf King, AL and Howard, WR 2004 , 'Planktonic foraminiferal δ13C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect' , Global Biogeochemical Cycles, vol. 18, no. 2 , GB2007 , doi:10.1029/2003GB002162 <http://dx.doi.org/10.1029/2003GB002162>. |
op_rights |
cc_utas |
op_doi |
https://doi.org/10.1029/2003GB002162 |
container_title |
Global Biogeochemical Cycles |
container_volume |
18 |
container_issue |
2 |
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n/a |
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n/a |
_version_ |
1766073093733744640 |