Diatom-bound N isotope records over the last two glacial cycles in sediment core PS75/072-4
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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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.848271 2024-09-15T17:40:25+00:00 Diatom-bound N isotope records over the last two glacial cycles in sediment core PS75/072-4 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 LATITUDE: -57.558500 * LONGITUDE: -151.219500 * DATE/TIME START: 2009-12-29T21:50:00 * DATE/TIME END: 2009-12-29T21:50:00 2015 application/zip, 5 datasets https://doi.pangaea.de/10.1594/PANGAEA.848271 https://doi.org/10.1594/PANGAEA.848271 en eng PANGAEA Studer, Anja S; Sigman, Daniel M; Martínez‐García, Alfredo; Thöle, Lena; Michel, Elisabeth; Jaccard, Samuel L; Lippold, Jörg; Mazaud, Alain; Wang, Xingchen; Robinson, Laura F; Adkins, Jess F; Haug, Gerald H (2018): Diatom-bound nitrogen isotope records in sediment core PS75/072-4 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.891435 Studer, Anja S; Sigman, Daniel M; Martínez‐García, Alfredo; Thöle, Lena; Michel, Elisabeth; Jaccard, Samuel L; Lippold, Jörg; Mazaud, Alain; Wang, Xingchen; Robinson, Laura F; Adkins, Jess F; Haug, Gerald H (2018): Opal flux of sediment core PS75/072-4 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.891430 https://doi.pangaea.de/10.1594/PANGAEA.848271 https://doi.org/10.1594/PANGAEA.848271 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess 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, https://doi.org/10.1002/2014PA002745 ANT-XXVI/2 AWI_Paleo Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS75/072-4 PS75 BIPOMAC SL South Pacific Ocean dataset publication series 2015 ftpangaea https://doi.org/10.1594/PANGAEA.84827110.1002/2014PA00274510.1594/PANGAEA.89143510.1594/PANGAEA.891430 2024-07-24T02:31:21Z 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. Other/Unknown Material Antarc* Antarctic Southern Ocean PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-151.219500,-151.219500,-57.558500,-57.558500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
ANT-XXVI/2 AWI_Paleo Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS75/072-4 PS75 BIPOMAC SL South Pacific Ocean |
spellingShingle |
ANT-XXVI/2 AWI_Paleo Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS75/072-4 PS75 BIPOMAC SL South Pacific Ocean 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 |
topic_facet |
ANT-XXVI/2 AWI_Paleo Gravity corer (Kiel type) Paleoenvironmental Reconstructions from Marine Sediments @ AWI Polarstern PS75/072-4 PS75 BIPOMAC SL South Pacific Ocean |
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 |
Other/Unknown Material |
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 |
title_short |
Diatom-bound N isotope records over the last two glacial cycles in sediment core PS75/072-4 |
title_full |
Diatom-bound N isotope records over the last two glacial cycles in sediment core PS75/072-4 |
title_fullStr |
Diatom-bound N isotope records over the last two glacial cycles in sediment core PS75/072-4 |
title_full_unstemmed |
Diatom-bound N isotope records over the last two glacial cycles in sediment core PS75/072-4 |
title_sort |
diatom-bound n isotope records over the last two glacial cycles in sediment core ps75/072-4 |
publisher |
PANGAEA |
publishDate |
2015 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.848271 https://doi.org/10.1594/PANGAEA.848271 |
op_coverage |
LATITUDE: -57.558500 * LONGITUDE: -151.219500 * DATE/TIME START: 2009-12-29T21:50:00 * DATE/TIME END: 2009-12-29T21:50:00 |
long_lat |
ENVELOPE(-151.219500,-151.219500,-57.558500,-57.558500) |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_source |
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, https://doi.org/10.1002/2014PA002745 |
op_relation |
Studer, Anja S; Sigman, Daniel M; Martínez‐García, Alfredo; Thöle, Lena; Michel, Elisabeth; Jaccard, Samuel L; Lippold, Jörg; Mazaud, Alain; Wang, Xingchen; Robinson, Laura F; Adkins, Jess F; Haug, Gerald H (2018): Diatom-bound nitrogen isotope records in sediment core PS75/072-4 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.891435 Studer, Anja S; Sigman, Daniel M; Martínez‐García, Alfredo; Thöle, Lena; Michel, Elisabeth; Jaccard, Samuel L; Lippold, Jörg; Mazaud, Alain; Wang, Xingchen; Robinson, Laura F; Adkins, Jess F; Haug, Gerald H (2018): Opal flux of sediment core PS75/072-4 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.891430 https://doi.pangaea.de/10.1594/PANGAEA.848271 https://doi.org/10.1594/PANGAEA.848271 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.84827110.1002/2014PA00274510.1594/PANGAEA.89143510.1594/PANGAEA.891430 |
_version_ |
1810486442733862912 |