New Magnetostratigraphic Insights From Iceberg Alley on the Rhythms of Antarctic Climate During the Plio‐Pleistocene
International Ocean Discovery Program (IODP) Expedition 382 in the Scotia Sea’s Iceberg Alley recovered among the most continuous and highest resolution stratigraphic records in the Southern Ocean near Antarctica spanning the last 3.3 Myr. Sites drilled in Dove Basin (U1536/U1537) have well‐resolved...
Published in: | Paleoceanography and Paleoclimatology |
---|---|
Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
AGU (American Geophysical Union)
2021
|
Subjects: | |
Online Access: | https://oceanrep.geomar.de/id/eprint/52066/ https://oceanrep.geomar.de/id/eprint/52066/1/Brendan%20etal.pdf https://oceanrep.geomar.de/id/eprint/52066/2/2020pa003994-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/52066/3/2020pa003994-sup-0002-table https://doi.org/10.1029/2020PA003994 |
id |
ftoceanrep:oai:oceanrep.geomar.de:52066 |
---|---|
record_format |
openpolar |
spelling |
ftoceanrep:oai:oceanrep.geomar.de:52066 2024-02-11T09:58:34+01:00 New Magnetostratigraphic Insights From Iceberg Alley on the Rhythms of Antarctic Climate During the Plio‐Pleistocene Reilly, Brendan T. Tauxe, Lisa Brachfeld, Stefanie Raymo, Maureen Bailey, Ian Hemming, Sidney Weber, Michael E. Williams, Trevor Garcia, Marga Guitard, Michelle Martos, Yasmina M. Pérez, Lara F. Zheng, Xufeng Armbrecht, Linda Cardillo, Fabricio G. Du, Zhiheng Fauth, Gerson Glueder, Anna Gutjahr, Marcus Hernández‐Almeida, Iván Hoem, Frida S. Hwang, Ji‐Hwan Iizuka, Mutsumi Kato, Yuji Kenlee, Bridget O’Connell, Suzanne Peck, Victoria Ronge, Thomas A. Seki, Osamu Tripathi, Shubham Warnock, Jonathan 2021-02-09 text other https://oceanrep.geomar.de/id/eprint/52066/ https://oceanrep.geomar.de/id/eprint/52066/1/Brendan%20etal.pdf https://oceanrep.geomar.de/id/eprint/52066/2/2020pa003994-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/52066/3/2020pa003994-sup-0002-table https://doi.org/10.1029/2020PA003994 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/52066/1/Brendan%20etal.pdf https://oceanrep.geomar.de/id/eprint/52066/2/2020pa003994-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/52066/3/2020pa003994-sup-0002-table Reilly, B. T., Tauxe, L., Brachfeld, S., Raymo, M., Bailey, I., Hemming, S., Weber, M. E., Williams, T., Garcia, M., Guitard, M., Martos, Y. M., Pérez, L. F., Zheng, X., Armbrecht, L., Cardillo, F. G., Du, Z., Fauth, G., Glueder, A., Gutjahr, M. , Hernández‐Almeida, I., Hoem, F. S., Hwang, J., Iizuka, M., Kato, Y., Kenlee, B., O’Connell, S., Peck, V., Ronge, T. A., Seki, O., Tripathi, S. and Warnock, J. (2021) New Magnetostratigraphic Insights From Iceberg Alley on the Rhythms of Antarctic Climate During the Plio‐Pleistocene. Open Access Paleoceanography and Paleoclimatology, 36 (2). e2020PA003994. DOI 10.1029/2020PA003994 <https://doi.org/10.1029/2020PA003994>. doi:10.1029/2020PA003994 info:eu-repo/semantics/openAccess Article PeerReviewed 2021 ftoceanrep https://doi.org/10.1029/2020PA003994 2024-01-15T00:23:13Z International Ocean Discovery Program (IODP) Expedition 382 in the Scotia Sea’s Iceberg Alley recovered among the most continuous and highest resolution stratigraphic records in the Southern Ocean near Antarctica spanning the last 3.3 Myr. Sites drilled in Dove Basin (U1536/U1537) have well‐resolved magnetostratigraphy and a strong imprint of orbital forcing in their lithostratigraphy. All magnetic reversals of the last 3.3 Myr are identified, providing a robust age model independent of orbital tuning. During the Pleistocene, alternation of terrigenous versus diatomaceous facies shows power in the eccentricity and obliquity frequencies comparable to the amplitude modulation of benthic δ18O records. This suggests that variations in Dove Basin lithostratigraphy during the Pleistocene reflect a similar history as globally integrated ice volume at these frequencies. However, power in the precession frequencies over the entire ∼3.3 Myr record does not match the amplitude modulation of benthic δ18O records, suggesting Dove Basin contains a unique record at these frequencies. Comparing the position of magnetic reversals relative to local facies changes in Dove Basin and the same magnetic reversals relative to benthic δ18O at North Atlantic IODP Site U1308, we demonstrate Dove Basin facies change at different times than benthic δ18O during intervals between ∼3 and 1 Ma. These differences are consistent with precession phase shifts and suggest climate signals with a Southern Hemisphere summer insolation phase were recorded around Antarctica. If Dove Basin lithology reflects local Antarctic ice volume changes, these signals could represent ice sheet precession‐paced variations not captured in benthic δ18O during the 41‐kyr world. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Iceberg* North Atlantic Southern Ocean OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Antarctic Southern Ocean Paleoceanography and Paleoclimatology 36 2 |
institution |
Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
International Ocean Discovery Program (IODP) Expedition 382 in the Scotia Sea’s Iceberg Alley recovered among the most continuous and highest resolution stratigraphic records in the Southern Ocean near Antarctica spanning the last 3.3 Myr. Sites drilled in Dove Basin (U1536/U1537) have well‐resolved magnetostratigraphy and a strong imprint of orbital forcing in their lithostratigraphy. All magnetic reversals of the last 3.3 Myr are identified, providing a robust age model independent of orbital tuning. During the Pleistocene, alternation of terrigenous versus diatomaceous facies shows power in the eccentricity and obliquity frequencies comparable to the amplitude modulation of benthic δ18O records. This suggests that variations in Dove Basin lithostratigraphy during the Pleistocene reflect a similar history as globally integrated ice volume at these frequencies. However, power in the precession frequencies over the entire ∼3.3 Myr record does not match the amplitude modulation of benthic δ18O records, suggesting Dove Basin contains a unique record at these frequencies. Comparing the position of magnetic reversals relative to local facies changes in Dove Basin and the same magnetic reversals relative to benthic δ18O at North Atlantic IODP Site U1308, we demonstrate Dove Basin facies change at different times than benthic δ18O during intervals between ∼3 and 1 Ma. These differences are consistent with precession phase shifts and suggest climate signals with a Southern Hemisphere summer insolation phase were recorded around Antarctica. If Dove Basin lithology reflects local Antarctic ice volume changes, these signals could represent ice sheet precession‐paced variations not captured in benthic δ18O during the 41‐kyr world. |
format |
Article in Journal/Newspaper |
author |
Reilly, Brendan T. Tauxe, Lisa Brachfeld, Stefanie Raymo, Maureen Bailey, Ian Hemming, Sidney Weber, Michael E. Williams, Trevor Garcia, Marga Guitard, Michelle Martos, Yasmina M. Pérez, Lara F. Zheng, Xufeng Armbrecht, Linda Cardillo, Fabricio G. Du, Zhiheng Fauth, Gerson Glueder, Anna Gutjahr, Marcus Hernández‐Almeida, Iván Hoem, Frida S. Hwang, Ji‐Hwan Iizuka, Mutsumi Kato, Yuji Kenlee, Bridget O’Connell, Suzanne Peck, Victoria Ronge, Thomas A. Seki, Osamu Tripathi, Shubham Warnock, Jonathan |
spellingShingle |
Reilly, Brendan T. Tauxe, Lisa Brachfeld, Stefanie Raymo, Maureen Bailey, Ian Hemming, Sidney Weber, Michael E. Williams, Trevor Garcia, Marga Guitard, Michelle Martos, Yasmina M. Pérez, Lara F. Zheng, Xufeng Armbrecht, Linda Cardillo, Fabricio G. Du, Zhiheng Fauth, Gerson Glueder, Anna Gutjahr, Marcus Hernández‐Almeida, Iván Hoem, Frida S. Hwang, Ji‐Hwan Iizuka, Mutsumi Kato, Yuji Kenlee, Bridget O’Connell, Suzanne Peck, Victoria Ronge, Thomas A. Seki, Osamu Tripathi, Shubham Warnock, Jonathan New Magnetostratigraphic Insights From Iceberg Alley on the Rhythms of Antarctic Climate During the Plio‐Pleistocene |
author_facet |
Reilly, Brendan T. Tauxe, Lisa Brachfeld, Stefanie Raymo, Maureen Bailey, Ian Hemming, Sidney Weber, Michael E. Williams, Trevor Garcia, Marga Guitard, Michelle Martos, Yasmina M. Pérez, Lara F. Zheng, Xufeng Armbrecht, Linda Cardillo, Fabricio G. Du, Zhiheng Fauth, Gerson Glueder, Anna Gutjahr, Marcus Hernández‐Almeida, Iván Hoem, Frida S. Hwang, Ji‐Hwan Iizuka, Mutsumi Kato, Yuji Kenlee, Bridget O’Connell, Suzanne Peck, Victoria Ronge, Thomas A. Seki, Osamu Tripathi, Shubham Warnock, Jonathan |
author_sort |
Reilly, Brendan T. |
title |
New Magnetostratigraphic Insights From Iceberg Alley on the Rhythms of Antarctic Climate During the Plio‐Pleistocene |
title_short |
New Magnetostratigraphic Insights From Iceberg Alley on the Rhythms of Antarctic Climate During the Plio‐Pleistocene |
title_full |
New Magnetostratigraphic Insights From Iceberg Alley on the Rhythms of Antarctic Climate During the Plio‐Pleistocene |
title_fullStr |
New Magnetostratigraphic Insights From Iceberg Alley on the Rhythms of Antarctic Climate During the Plio‐Pleistocene |
title_full_unstemmed |
New Magnetostratigraphic Insights From Iceberg Alley on the Rhythms of Antarctic Climate During the Plio‐Pleistocene |
title_sort |
new magnetostratigraphic insights from iceberg alley on the rhythms of antarctic climate during the plio‐pleistocene |
publisher |
AGU (American Geophysical Union) |
publishDate |
2021 |
url |
https://oceanrep.geomar.de/id/eprint/52066/ https://oceanrep.geomar.de/id/eprint/52066/1/Brendan%20etal.pdf https://oceanrep.geomar.de/id/eprint/52066/2/2020pa003994-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/52066/3/2020pa003994-sup-0002-table https://doi.org/10.1029/2020PA003994 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Antarctica Ice Sheet Iceberg* North Atlantic Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Iceberg* North Atlantic Southern Ocean |
op_relation |
https://oceanrep.geomar.de/id/eprint/52066/1/Brendan%20etal.pdf https://oceanrep.geomar.de/id/eprint/52066/2/2020pa003994-sup-0001-supporting https://oceanrep.geomar.de/id/eprint/52066/3/2020pa003994-sup-0002-table Reilly, B. T., Tauxe, L., Brachfeld, S., Raymo, M., Bailey, I., Hemming, S., Weber, M. E., Williams, T., Garcia, M., Guitard, M., Martos, Y. M., Pérez, L. F., Zheng, X., Armbrecht, L., Cardillo, F. G., Du, Z., Fauth, G., Glueder, A., Gutjahr, M. , Hernández‐Almeida, I., Hoem, F. S., Hwang, J., Iizuka, M., Kato, Y., Kenlee, B., O’Connell, S., Peck, V., Ronge, T. A., Seki, O., Tripathi, S. and Warnock, J. (2021) New Magnetostratigraphic Insights From Iceberg Alley on the Rhythms of Antarctic Climate During the Plio‐Pleistocene. Open Access Paleoceanography and Paleoclimatology, 36 (2). e2020PA003994. DOI 10.1029/2020PA003994 <https://doi.org/10.1029/2020PA003994>. doi:10.1029/2020PA003994 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2020PA003994 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
36 |
container_issue |
2 |
_version_ |
1790594253261373440 |