Latitudinal Variance in the Drivers and Pacing of Warmth During Mid‐Pleistocene MIS 31 in the Antarctic Zone of the Southern Ocean
Early Pleistocene Marine Isotope Stage (MIS)-31 (1.081–1.062 Ma) is a unique interval of extreme global warming, including evidence of a West Antarctic Ice Sheet (WAIS) collapse. Here we present a new 1,000-year resolution, spanning 1.110–1.030 Ma, diatom-based reconstruction of primary productivity...
Published in: | Paleoceanography and Paleoclimatology |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
AGU (American Geophysical Union)
2022
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Subjects: | |
Online Access: | https://oceanrep.geomar.de/id/eprint/57060/ https://oceanrep.geomar.de/id/eprint/57060/1/Paleoceanog%20and%20Paleoclimatol%20-%202022%20-%20Warnock.pdf https://oceanrep.geomar.de/id/eprint/57060/2/2021pa004394-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/57060/3/2021pa004394-sup-0002-table https://doi.org/10.1029/2021PA004394 |
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ftoceanrep:oai:oceanrep.geomar.de:57060 |
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openpolar |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
Early Pleistocene Marine Isotope Stage (MIS)-31 (1.081–1.062 Ma) is a unique interval of extreme global warming, including evidence of a West Antarctic Ice Sheet (WAIS) collapse. Here we present a new 1,000-year resolution, spanning 1.110–1.030 Ma, diatom-based reconstruction of primary productivity, relative sea surface temperature changes, sea-ice proximity/open ocean conditions and diatom species absolute abundances during MIS-31, from the Scotia Sea (59°S) using deep-sea sediments collected during International Ocean Discovery Program (IODP) Expedition 382. The lower Jaramillo magnetic reversal (base of C1r.1n, 1.071 Ma) provides a robust and independent time-stratigraphic marker to correlate records from other drill cores in the Antarctic Zone of the Southern Ocean (AZSO). An increase in open ocean species Fragilariopsis kerguelensis in early MIS-31 at 53°S (Ocean Drilling Program Site 1,094) correlates with increased obliquity forcing, whereas at 59°S (IODP Site U1537; this study) three progressively increasing, successive peaks in the relative abundance of F. kerguelensis correlate with Southern Hemisphere-phased precession pacing. These observations reveal a complex pattern of ocean temperature change and sustained sea surface temperature increase lasting longer than a precession cycle within the Atlantic sector of the AZSO. Timing of an inferred WAIS collapse is consistent with delayed warmth (possibly driven by sea-ice dynamics) in the southern AZSO, supporting models that indicate WAIS sensitivity to local sub-ice shelf melting. Anthropogenically enhanced impingement of relatively warm water beneath the ice shelves today highlights the importance of understanding dynamic responses of the WAIS during MIS-31, a warmer than Holocene interglacia |
format |
Article in Journal/Newspaper |
author |
Warnock, Jonathan P. Reilly, Brendan T. Raymo, Maureen E. Weber, Michael E. Peck, Victoria Williams, Trevor Armbrecht, Linda Bailey, Ian Brachfeld, Stefanie Du, Zhiheng Fauth, Gerson García, Marga M. Glüder, Anna Guitard, Michelle Gutjahr, Marcus Hemming, Sidney Hernández‐Almeida, Iván Hoem, Freida S. Hwang, Ji‐Hwan Iizuka, Mutsumi Kato, Yuji Lee, Bridget Martos, Yasmina M. O’Connell, Suzanne Pérez, Lara F. Ronge, Thomas A. Seki, Osamu Tauxe, Lisa Tripathi, Shubham Zheng, Xufeng Stoner, Joseph Scherer, Reed P. |
spellingShingle |
Warnock, Jonathan P. Reilly, Brendan T. Raymo, Maureen E. Weber, Michael E. Peck, Victoria Williams, Trevor Armbrecht, Linda Bailey, Ian Brachfeld, Stefanie Du, Zhiheng Fauth, Gerson García, Marga M. Glüder, Anna Guitard, Michelle Gutjahr, Marcus Hemming, Sidney Hernández‐Almeida, Iván Hoem, Freida S. Hwang, Ji‐Hwan Iizuka, Mutsumi Kato, Yuji Lee, Bridget Martos, Yasmina M. O’Connell, Suzanne Pérez, Lara F. Ronge, Thomas A. Seki, Osamu Tauxe, Lisa Tripathi, Shubham Zheng, Xufeng Stoner, Joseph Scherer, Reed P. Latitudinal Variance in the Drivers and Pacing of Warmth During Mid‐Pleistocene MIS 31 in the Antarctic Zone of the Southern Ocean |
author_facet |
Warnock, Jonathan P. Reilly, Brendan T. Raymo, Maureen E. Weber, Michael E. Peck, Victoria Williams, Trevor Armbrecht, Linda Bailey, Ian Brachfeld, Stefanie Du, Zhiheng Fauth, Gerson García, Marga M. Glüder, Anna Guitard, Michelle Gutjahr, Marcus Hemming, Sidney Hernández‐Almeida, Iván Hoem, Freida S. Hwang, Ji‐Hwan Iizuka, Mutsumi Kato, Yuji Lee, Bridget Martos, Yasmina M. O’Connell, Suzanne Pérez, Lara F. Ronge, Thomas A. Seki, Osamu Tauxe, Lisa Tripathi, Shubham Zheng, Xufeng Stoner, Joseph Scherer, Reed P. |
author_sort |
Warnock, Jonathan P. |
title |
Latitudinal Variance in the Drivers and Pacing of Warmth During Mid‐Pleistocene MIS 31 in the Antarctic Zone of the Southern Ocean |
title_short |
Latitudinal Variance in the Drivers and Pacing of Warmth During Mid‐Pleistocene MIS 31 in the Antarctic Zone of the Southern Ocean |
title_full |
Latitudinal Variance in the Drivers and Pacing of Warmth During Mid‐Pleistocene MIS 31 in the Antarctic Zone of the Southern Ocean |
title_fullStr |
Latitudinal Variance in the Drivers and Pacing of Warmth During Mid‐Pleistocene MIS 31 in the Antarctic Zone of the Southern Ocean |
title_full_unstemmed |
Latitudinal Variance in the Drivers and Pacing of Warmth During Mid‐Pleistocene MIS 31 in the Antarctic Zone of the Southern Ocean |
title_sort |
latitudinal variance in the drivers and pacing of warmth during mid‐pleistocene mis 31 in the antarctic zone of the southern ocean |
publisher |
AGU (American Geophysical Union) |
publishDate |
2022 |
url |
https://oceanrep.geomar.de/id/eprint/57060/ https://oceanrep.geomar.de/id/eprint/57060/1/Paleoceanog%20and%20Paleoclimatol%20-%202022%20-%20Warnock.pdf https://oceanrep.geomar.de/id/eprint/57060/2/2021pa004394-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/57060/3/2021pa004394-sup-0002-table https://doi.org/10.1029/2021PA004394 |
geographic |
Antarctic Southern Ocean The Antarctic Scotia Sea West Antarctic Ice Sheet |
geographic_facet |
Antarctic Southern Ocean The Antarctic Scotia Sea West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Scotia Sea Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Scotia Sea Sea ice Southern Ocean |
op_relation |
https://oceanrep.geomar.de/id/eprint/57060/1/Paleoceanog%20and%20Paleoclimatol%20-%202022%20-%20Warnock.pdf https://oceanrep.geomar.de/id/eprint/57060/2/2021pa004394-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/57060/3/2021pa004394-sup-0002-table Warnock, J. P., Reilly, B. T., Raymo, M. E., Weber, M. E., Peck, V., Williams, T., Armbrecht, L., Bailey, I., Brachfeld, S., Du, Z., Fauth, G., García, M. M., Glüder, A., Guitard, M., Gutjahr, M. , Hemming, S., Hernández‐Almeida, I., Hoem, F. S., Hwang, J., Iizuka, M., Kato, Y., Lee, B., Martos, Y. M., O’Connell, S., Pérez, L. F., Ronge, T. A., Seki, O., Tauxe, L., Tripathi, S., Zheng, X., Stoner, J. and Scherer, R. P. (2022) Latitudinal Variance in the Drivers and Pacing of Warmth During Mid‐Pleistocene MIS 31 in the Antarctic Zone of the Southern Ocean. Open Access Paleoceanography and Paleoclimatology, 37 (8). e2021PA00439. DOI 10.1029/2021PA004394 <https://doi.org/10.1029/2021PA004394>. doi:10.1029/2021PA004394 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2021PA004394 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
37 |
container_issue |
8 |
_version_ |
1790609546888085504 |
spelling |
ftoceanrep:oai:oceanrep.geomar.de:57060 2024-02-11T09:57:15+01:00 Latitudinal Variance in the Drivers and Pacing of Warmth During Mid‐Pleistocene MIS 31 in the Antarctic Zone of the Southern Ocean Warnock, Jonathan P. Reilly, Brendan T. Raymo, Maureen E. Weber, Michael E. Peck, Victoria Williams, Trevor Armbrecht, Linda Bailey, Ian Brachfeld, Stefanie Du, Zhiheng Fauth, Gerson García, Marga M. Glüder, Anna Guitard, Michelle Gutjahr, Marcus Hemming, Sidney Hernández‐Almeida, Iván Hoem, Freida S. Hwang, Ji‐Hwan Iizuka, Mutsumi Kato, Yuji Lee, Bridget Martos, Yasmina M. O’Connell, Suzanne Pérez, Lara F. Ronge, Thomas A. Seki, Osamu Tauxe, Lisa Tripathi, Shubham Zheng, Xufeng Stoner, Joseph Scherer, Reed P. 2022-08-15 text other https://oceanrep.geomar.de/id/eprint/57060/ https://oceanrep.geomar.de/id/eprint/57060/1/Paleoceanog%20and%20Paleoclimatol%20-%202022%20-%20Warnock.pdf https://oceanrep.geomar.de/id/eprint/57060/2/2021pa004394-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/57060/3/2021pa004394-sup-0002-table https://doi.org/10.1029/2021PA004394 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/57060/1/Paleoceanog%20and%20Paleoclimatol%20-%202022%20-%20Warnock.pdf https://oceanrep.geomar.de/id/eprint/57060/2/2021pa004394-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/57060/3/2021pa004394-sup-0002-table Warnock, J. P., Reilly, B. T., Raymo, M. E., Weber, M. E., Peck, V., Williams, T., Armbrecht, L., Bailey, I., Brachfeld, S., Du, Z., Fauth, G., García, M. M., Glüder, A., Guitard, M., Gutjahr, M. , Hemming, S., Hernández‐Almeida, I., Hoem, F. S., Hwang, J., Iizuka, M., Kato, Y., Lee, B., Martos, Y. M., O’Connell, S., Pérez, L. F., Ronge, T. A., Seki, O., Tauxe, L., Tripathi, S., Zheng, X., Stoner, J. and Scherer, R. P. (2022) Latitudinal Variance in the Drivers and Pacing of Warmth During Mid‐Pleistocene MIS 31 in the Antarctic Zone of the Southern Ocean. Open Access Paleoceanography and Paleoclimatology, 37 (8). e2021PA00439. DOI 10.1029/2021PA004394 <https://doi.org/10.1029/2021PA004394>. doi:10.1029/2021PA004394 info:eu-repo/semantics/openAccess Article PeerReviewed 2022 ftoceanrep https://doi.org/10.1029/2021PA004394 2024-01-15T00:25:56Z Early Pleistocene Marine Isotope Stage (MIS)-31 (1.081–1.062 Ma) is a unique interval of extreme global warming, including evidence of a West Antarctic Ice Sheet (WAIS) collapse. Here we present a new 1,000-year resolution, spanning 1.110–1.030 Ma, diatom-based reconstruction of primary productivity, relative sea surface temperature changes, sea-ice proximity/open ocean conditions and diatom species absolute abundances during MIS-31, from the Scotia Sea (59°S) using deep-sea sediments collected during International Ocean Discovery Program (IODP) Expedition 382. The lower Jaramillo magnetic reversal (base of C1r.1n, 1.071 Ma) provides a robust and independent time-stratigraphic marker to correlate records from other drill cores in the Antarctic Zone of the Southern Ocean (AZSO). An increase in open ocean species Fragilariopsis kerguelensis in early MIS-31 at 53°S (Ocean Drilling Program Site 1,094) correlates with increased obliquity forcing, whereas at 59°S (IODP Site U1537; this study) three progressively increasing, successive peaks in the relative abundance of F. kerguelensis correlate with Southern Hemisphere-phased precession pacing. These observations reveal a complex pattern of ocean temperature change and sustained sea surface temperature increase lasting longer than a precession cycle within the Atlantic sector of the AZSO. Timing of an inferred WAIS collapse is consistent with delayed warmth (possibly driven by sea-ice dynamics) in the southern AZSO, supporting models that indicate WAIS sensitivity to local sub-ice shelf melting. Anthropogenically enhanced impingement of relatively warm water beneath the ice shelves today highlights the importance of understanding dynamic responses of the WAIS during MIS-31, a warmer than Holocene interglacia Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Scotia Sea Sea ice Southern Ocean OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Southern Ocean The Antarctic Scotia Sea West Antarctic Ice Sheet Paleoceanography and Paleoclimatology 37 8 |