Diatom-bound N isotope records over the last two glacial cycles in sediment core PS75/072-4, supplement to: Studer, Anja S; Sigman, Daniel M; Martínez‐García, Alfredo; Benz, Verena; Winckler, Gisela; Kuhn, Gerhard; Esper, Oliver; Lamy, Frank; Jaccard, Samuel L; Wacker, Lukas; Oleynik, Sergey; Gersonde, Rainer; Haug, Gerald H (2015): Antarctic Zone nutrient conditions during the last two glacial cycles. Paleoceanography, 30(7), 845-862
In a sediment core from the Pacific sector of the Antarctic Zone (AZ) of the Southern Ocean, we report diatom-bound N isotope (d15Ndb) records for total recoverable diatoms and two distinct diatom assemblages (pennate and centric rich). These data indicate tight coupling between the degree of nitrat...
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Online Access: | https://dx.doi.org/10.1594/pangaea.848271 https://doi.pangaea.de/10.1594/PANGAEA.848271 |
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ftdatacite:10.1594/pangaea.848271 2023-05-15T13:35:31+02:00 Diatom-bound N isotope records over the last two glacial cycles in sediment core PS75/072-4, supplement to: Studer, Anja S; Sigman, Daniel M; Martínez‐García, Alfredo; Benz, Verena; Winckler, Gisela; Kuhn, Gerhard; Esper, Oliver; Lamy, Frank; Jaccard, Samuel L; Wacker, Lukas; Oleynik, Sergey; Gersonde, Rainer; Haug, Gerald H (2015): Antarctic Zone nutrient conditions during the last two glacial cycles. Paleoceanography, 30(7), 845-862 Studer, Anja S Sigman, Daniel M Martínez‐García, Alfredo Benz, Verena Winckler, Gisela Kuhn, Gerhard Esper, Oliver Lamy, Frank Jaccard, Samuel L Wacker, Lukas Oleynik, Sergey Gersonde, Rainer Haug, Gerald H 2015 application/zip https://dx.doi.org/10.1594/pangaea.848271 https://doi.pangaea.de/10.1594/PANGAEA.848271 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1002/2014pa002745 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Gravity corer Kiel type ANT-XXVI/2 Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo Collection article Supplementary Collection of Datasets 2015 ftdatacite https://doi.org/10.1594/pangaea.848271 https://doi.org/10.1002/2014pa002745 2021-11-05T12:55:41Z In a sediment core from the Pacific sector of the Antarctic Zone (AZ) of the Southern Ocean, we report diatom-bound N isotope (d15Ndb) records for total recoverable diatoms and two distinct diatom assemblages (pennate and centric rich). These data indicate tight coupling between the degree of nitrate consumption and Antarctic climate across the last two glacial cycles, with d15Ndb (and thus the degree of nitrate consumption) increasing at each major Antarctic cooling event. Coupled with evidence from opal- and barium-based proxies for reduced export production during ice ages, the d15Ndb increases point to ice age reductions in the supply of deep ocean-sourced nitrate to the AZ surface. The two diatom assemblages and species abundance data indicate that the d15Ndb changes are not the result of changing species composition. The pennate and centric assemblage d15Ndb records indicate similar changes but with a significant decline in their difference during peak ice ages. A tentative seasonality-based interpretation of the centric-to-pennate d15Ndb difference suggests that late summer surface waters became nitrate free during the peak glacials. Article in Journal/Newspaper Antarc* Antarctic Southern Ocean DataCite Metadata Store (German National Library of Science and Technology) Antarctic Southern Ocean The Antarctic Pacific Martínez ENVELOPE(-62.183,-62.183,-64.650,-64.650) Haug ENVELOPE(15.188,15.188,67.918,67.918) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Gravity corer Kiel type ANT-XXVI/2 Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo |
spellingShingle |
Gravity corer Kiel type ANT-XXVI/2 Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo Studer, Anja S Sigman, Daniel M Martínez‐García, Alfredo Benz, Verena Winckler, Gisela Kuhn, Gerhard Esper, Oliver Lamy, Frank Jaccard, Samuel L Wacker, Lukas Oleynik, Sergey Gersonde, Rainer Haug, Gerald H Diatom-bound N isotope records over the last two glacial cycles in sediment core PS75/072-4, supplement to: Studer, Anja S; Sigman, Daniel M; Martínez‐García, Alfredo; Benz, Verena; Winckler, Gisela; Kuhn, Gerhard; Esper, Oliver; Lamy, Frank; Jaccard, Samuel L; Wacker, Lukas; Oleynik, Sergey; Gersonde, Rainer; Haug, Gerald H (2015): Antarctic Zone nutrient conditions during the last two glacial cycles. Paleoceanography, 30(7), 845-862 |
topic_facet |
Gravity corer Kiel type ANT-XXVI/2 Polarstern Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo |
description |
In a sediment core from the Pacific sector of the Antarctic Zone (AZ) of the Southern Ocean, we report diatom-bound N isotope (d15Ndb) records for total recoverable diatoms and two distinct diatom assemblages (pennate and centric rich). These data indicate tight coupling between the degree of nitrate consumption and Antarctic climate across the last two glacial cycles, with d15Ndb (and thus the degree of nitrate consumption) increasing at each major Antarctic cooling event. Coupled with evidence from opal- and barium-based proxies for reduced export production during ice ages, the d15Ndb increases point to ice age reductions in the supply of deep ocean-sourced nitrate to the AZ surface. The two diatom assemblages and species abundance data indicate that the d15Ndb changes are not the result of changing species composition. The pennate and centric assemblage d15Ndb records indicate similar changes but with a significant decline in their difference during peak ice ages. A tentative seasonality-based interpretation of the centric-to-pennate d15Ndb difference suggests that late summer surface waters became nitrate free during the peak glacials. |
format |
Article in Journal/Newspaper |
author |
Studer, Anja S Sigman, Daniel M Martínez‐García, Alfredo Benz, Verena Winckler, Gisela Kuhn, Gerhard Esper, Oliver Lamy, Frank Jaccard, Samuel L Wacker, Lukas Oleynik, Sergey Gersonde, Rainer Haug, Gerald H |
author_facet |
Studer, Anja S Sigman, Daniel M Martínez‐García, Alfredo Benz, Verena Winckler, Gisela Kuhn, Gerhard Esper, Oliver Lamy, Frank Jaccard, Samuel L Wacker, Lukas Oleynik, Sergey Gersonde, Rainer Haug, Gerald H |
author_sort |
Studer, Anja S |
title |
Diatom-bound N isotope records over the last two glacial cycles in sediment core PS75/072-4, supplement to: Studer, Anja S; Sigman, Daniel M; Martínez‐García, Alfredo; Benz, Verena; Winckler, Gisela; Kuhn, Gerhard; Esper, Oliver; Lamy, Frank; Jaccard, Samuel L; Wacker, Lukas; Oleynik, Sergey; Gersonde, Rainer; Haug, Gerald H (2015): Antarctic Zone nutrient conditions during the last two glacial cycles. Paleoceanography, 30(7), 845-862 |
title_short |
Diatom-bound N isotope records over the last two glacial cycles in sediment core PS75/072-4, supplement to: Studer, Anja S; Sigman, Daniel M; Martínez‐García, Alfredo; Benz, Verena; Winckler, Gisela; Kuhn, Gerhard; Esper, Oliver; Lamy, Frank; Jaccard, Samuel L; Wacker, Lukas; Oleynik, Sergey; Gersonde, Rainer; Haug, Gerald H (2015): Antarctic Zone nutrient conditions during the last two glacial cycles. Paleoceanography, 30(7), 845-862 |
title_full |
Diatom-bound N isotope records over the last two glacial cycles in sediment core PS75/072-4, supplement to: Studer, Anja S; Sigman, Daniel M; Martínez‐García, Alfredo; Benz, Verena; Winckler, Gisela; Kuhn, Gerhard; Esper, Oliver; Lamy, Frank; Jaccard, Samuel L; Wacker, Lukas; Oleynik, Sergey; Gersonde, Rainer; Haug, Gerald H (2015): Antarctic Zone nutrient conditions during the last two glacial cycles. Paleoceanography, 30(7), 845-862 |
title_fullStr |
Diatom-bound N isotope records over the last two glacial cycles in sediment core PS75/072-4, supplement to: Studer, Anja S; Sigman, Daniel M; Martínez‐García, Alfredo; Benz, Verena; Winckler, Gisela; Kuhn, Gerhard; Esper, Oliver; Lamy, Frank; Jaccard, Samuel L; Wacker, Lukas; Oleynik, Sergey; Gersonde, Rainer; Haug, Gerald H (2015): Antarctic Zone nutrient conditions during the last two glacial cycles. Paleoceanography, 30(7), 845-862 |
title_full_unstemmed |
Diatom-bound N isotope records over the last two glacial cycles in sediment core PS75/072-4, supplement to: Studer, Anja S; Sigman, Daniel M; Martínez‐García, Alfredo; Benz, Verena; Winckler, Gisela; Kuhn, Gerhard; Esper, Oliver; Lamy, Frank; Jaccard, Samuel L; Wacker, Lukas; Oleynik, Sergey; Gersonde, Rainer; Haug, Gerald H (2015): Antarctic Zone nutrient conditions during the last two glacial cycles. Paleoceanography, 30(7), 845-862 |
title_sort |
diatom-bound n isotope records over the last two glacial cycles in sediment core ps75/072-4, supplement to: studer, anja s; sigman, daniel m; martínez‐garcía, alfredo; benz, verena; winckler, gisela; kuhn, gerhard; esper, oliver; lamy, frank; jaccard, samuel l; wacker, lukas; oleynik, sergey; gersonde, rainer; haug, gerald h (2015): antarctic zone nutrient conditions during the last two glacial cycles. paleoceanography, 30(7), 845-862 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2015 |
url |
https://dx.doi.org/10.1594/pangaea.848271 https://doi.pangaea.de/10.1594/PANGAEA.848271 |
long_lat |
ENVELOPE(-62.183,-62.183,-64.650,-64.650) ENVELOPE(15.188,15.188,67.918,67.918) |
geographic |
Antarctic Southern Ocean The Antarctic Pacific Martínez Haug |
geographic_facet |
Antarctic Southern Ocean The Antarctic Pacific Martínez Haug |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
https://dx.doi.org/10.1002/2014pa002745 |
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.848271 https://doi.org/10.1002/2014pa002745 |
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1766066735761326080 |