Planktonic foraminiferal δ C 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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Language: | English |
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American Geophysical Union
2004
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Online Access: | https://doi.org/10.1029/2003GB002162 http://ecite.utas.edu.au/38672 |
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ftunivtasecite:oai:ecite.utas.edu.au:38672 2023-05-15T17:14:59+02:00 Planktonic foraminiferal δ C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect King, AL Howard, W 2004 https://doi.org/10.1029/2003GB002162 http://ecite.utas.edu.au/38672 en eng American Geophysical Union http://dx.doi.org/10.1029/2003GB002162 King, AL and Howard, W, Planktonic foraminiferal δ C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect, Global Biogeochemical Cycles, 18, (2) pp. GB2007. ISSN 0886-6236 (2004) [Refereed Article] http://ecite.utas.edu.au/38672 Earth Sciences Geology Palaeontology (incl. Palynology) Refereed Article PeerReviewed 2004 ftunivtasecite https://doi.org/10.1029/2003GB002162 2019-12-13T21:16:18Z 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 δ13 CDIC 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. Copyright 2004 by the American Geophysical Union. Article in Journal/Newspaper Neogloboquadrina pachyderma Planktonic foraminifera Southern Ocean eCite UTAS (University of Tasmania) Pacific Southern Ocean Global Biogeochemical Cycles 18 2 n/a n/a |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Geology Palaeontology (incl. Palynology) |
spellingShingle |
Earth Sciences Geology Palaeontology (incl. Palynology) King, AL Howard, W Planktonic foraminiferal δ C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect |
topic_facet |
Earth Sciences Geology Palaeontology (incl. Palynology) |
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 δ13 CDIC 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. Copyright 2004 by the American Geophysical Union. |
format |
Article in Journal/Newspaper |
author |
King, AL Howard, W |
author_facet |
King, AL Howard, W |
author_sort |
King, AL |
title |
Planktonic foraminiferal δ C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect |
title_short |
Planktonic foraminiferal δ C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect |
title_full |
Planktonic foraminiferal δ C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect |
title_fullStr |
Planktonic foraminiferal δ C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect |
title_full_unstemmed |
Planktonic foraminiferal δ C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect |
title_sort |
planktonic foraminiferal δ c records from southern ocean sediment traps: new estimates of the oceanic suess effect |
publisher |
American Geophysical Union |
publishDate |
2004 |
url |
https://doi.org/10.1029/2003GB002162 http://ecite.utas.edu.au/38672 |
geographic |
Pacific Southern Ocean |
geographic_facet |
Pacific Southern Ocean |
genre |
Neogloboquadrina pachyderma Planktonic foraminifera Southern Ocean |
genre_facet |
Neogloboquadrina pachyderma Planktonic foraminifera Southern Ocean |
op_relation |
http://dx.doi.org/10.1029/2003GB002162 King, AL and Howard, W, Planktonic foraminiferal δ C records from Southern Ocean sediment traps: New estimates of the oceanic Suess effect, Global Biogeochemical Cycles, 18, (2) pp. GB2007. ISSN 0886-6236 (2004) [Refereed Article] http://ecite.utas.edu.au/38672 |
op_doi |
https://doi.org/10.1029/2003GB002162 |
container_title |
Global Biogeochemical Cycles |
container_volume |
18 |
container_issue |
2 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1766073100394299392 |