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 Seas Iceberg Alley recovered among the most continuous and highest resolution stratigraphic records in the Southern Ocean near Antarctica spanning the last 3.3Myr. Sites drilled in Dove Basin (U1536/U1537) have well-resolved m...
Published in: | Paleoceanography and Paleoclimatology |
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Wiley-Blackwell Publishing Inc.
2021
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Online Access: | https://doi.org/10.1029/2020PA003994 http://ecite.utas.edu.au/147882 |
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ftunivtasecite:oai:ecite.utas.edu.au:147882 2023-05-15T13:42:40+02:00 New magnetostratigraphic insights from Iceberg Alley on the rhythms of Antarctic climate during the Plio-Pleistocene Reilly, BT Tauxe, L Brachfeld, S Raymo, M Bailey, I Hemming, S Weber, ME Williams, T Garcia, M Guitard, M Martos, YM Perez, LF Zheng, X Armbrecht, L Cardillo, FG Du, Z Fauth, G Glueder, A Gutjahr, M Hernandez-Almeida, I Hoem, FS Hwang, J-H Iizuka, M Kato, Y Kenlee, B O'Connell, S Peck, V Ronge, TA Seki, O Tripathi, S Warnock, J 2021 application/pdf https://doi.org/10.1029/2020PA003994 http://ecite.utas.edu.au/147882 en eng Wiley-Blackwell Publishing Inc. http://ecite.utas.edu.au/147882/1/147882 - New magnetostratigraphic insights from iceberg alley.pdf http://dx.doi.org/10.1029/2020PA003994 Reilly, BT and Tauxe, L and Brachfeld, S and Raymo, M and Bailey, I and Hemming, S and Weber, ME and Williams, T and Garcia, M and Guitard, M and Martos, YM and Perez, LF and Zheng, X and Armbrecht, L and Cardillo, FG and Du, Z and Fauth, G and Glueder, A and Gutjahr, M and Hernandez-Almeida, I and Hoem, FS and Hwang, J-H and Iizuka, M and Kato, Y and Kenlee, B and O'Connell, S and Peck, V and Ronge, TA and Seki, O and Tripathi, S and Warnock, J, New magnetostratigraphic insights from Iceberg Alley on the rhythms of Antarctic climate during the Plio-Pleistocene, Paleoceanography and Paleoclimatology, 36, (2) Article e2020PA003994. ISSN 2572-4517 (2021) [Refereed Article] http://ecite.utas.edu.au/147882 Earth Sciences Geophysics Magnetism and palaeomagnetism Refereed Article PeerReviewed 2021 ftunivtasecite https://doi.org/10.1029/2020PA003994 2022-08-29T22:18:36Z International Ocean Discovery Program (IODP) Expedition 382 in the Scotia Seas Iceberg Alley recovered among the most continuous and highest resolution stratigraphic records in the Southern Ocean near Antarctica spanning the last 3.3Myr. 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 3.3Myr 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 δ 18 O 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 ∼3.3Myr record does not match the amplitude modulation of benthic δ 18 O 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 δ 18 O at North Atlantic IODP Site U1308, we demonstrate Dove Basin facies change at different times than benthic δ 18 O during intervals between ∼3 and 1Ma. 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 δ 18 O during the 41-kyr world. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Iceberg* North Atlantic Southern Ocean eCite UTAS (University of Tasmania) Antarctic Southern Ocean Paleoceanography and Paleoclimatology 36 2 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Geophysics Magnetism and palaeomagnetism |
spellingShingle |
Earth Sciences Geophysics Magnetism and palaeomagnetism Reilly, BT Tauxe, L Brachfeld, S Raymo, M Bailey, I Hemming, S Weber, ME Williams, T Garcia, M Guitard, M Martos, YM Perez, LF Zheng, X Armbrecht, L Cardillo, FG Du, Z Fauth, G Glueder, A Gutjahr, M Hernandez-Almeida, I Hoem, FS Hwang, J-H Iizuka, M Kato, Y Kenlee, B O'Connell, S Peck, V Ronge, TA Seki, O Tripathi, S Warnock, J New magnetostratigraphic insights from Iceberg Alley on the rhythms of Antarctic climate during the Plio-Pleistocene |
topic_facet |
Earth Sciences Geophysics Magnetism and palaeomagnetism |
description |
International Ocean Discovery Program (IODP) Expedition 382 in the Scotia Seas Iceberg Alley recovered among the most continuous and highest resolution stratigraphic records in the Southern Ocean near Antarctica spanning the last 3.3Myr. 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 3.3Myr 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 δ 18 O 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 ∼3.3Myr record does not match the amplitude modulation of benthic δ 18 O 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 δ 18 O at North Atlantic IODP Site U1308, we demonstrate Dove Basin facies change at different times than benthic δ 18 O during intervals between ∼3 and 1Ma. 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 δ 18 O during the 41-kyr world. |
format |
Article in Journal/Newspaper |
author |
Reilly, BT Tauxe, L Brachfeld, S Raymo, M Bailey, I Hemming, S Weber, ME Williams, T Garcia, M Guitard, M Martos, YM Perez, LF Zheng, X Armbrecht, L Cardillo, FG Du, Z Fauth, G Glueder, A Gutjahr, M Hernandez-Almeida, I Hoem, FS Hwang, J-H Iizuka, M Kato, Y Kenlee, B O'Connell, S Peck, V Ronge, TA Seki, O Tripathi, S Warnock, J |
author_facet |
Reilly, BT Tauxe, L Brachfeld, S Raymo, M Bailey, I Hemming, S Weber, ME Williams, T Garcia, M Guitard, M Martos, YM Perez, LF Zheng, X Armbrecht, L Cardillo, FG Du, Z Fauth, G Glueder, A Gutjahr, M Hernandez-Almeida, I Hoem, FS Hwang, J-H Iizuka, M Kato, Y Kenlee, B O'Connell, S Peck, V Ronge, TA Seki, O Tripathi, S Warnock, J |
author_sort |
Reilly, BT |
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 |
Wiley-Blackwell Publishing Inc. |
publishDate |
2021 |
url |
https://doi.org/10.1029/2020PA003994 http://ecite.utas.edu.au/147882 |
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 |
http://ecite.utas.edu.au/147882/1/147882 - New magnetostratigraphic insights from iceberg alley.pdf http://dx.doi.org/10.1029/2020PA003994 Reilly, BT and Tauxe, L and Brachfeld, S and Raymo, M and Bailey, I and Hemming, S and Weber, ME and Williams, T and Garcia, M and Guitard, M and Martos, YM and Perez, LF and Zheng, X and Armbrecht, L and Cardillo, FG and Du, Z and Fauth, G and Glueder, A and Gutjahr, M and Hernandez-Almeida, I and Hoem, FS and Hwang, J-H and Iizuka, M and Kato, Y and Kenlee, B and O'Connell, S and Peck, V and Ronge, TA and Seki, O and Tripathi, S and Warnock, J, New magnetostratigraphic insights from Iceberg Alley on the rhythms of Antarctic climate during the Plio-Pleistocene, Paleoceanography and Paleoclimatology, 36, (2) Article e2020PA003994. ISSN 2572-4517 (2021) [Refereed Article] http://ecite.utas.edu.au/147882 |
op_doi |
https://doi.org/10.1029/2020PA003994 |
container_title |
Paleoceanography and Paleoclimatology |
container_volume |
36 |
container_issue |
2 |
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1766171265095172096 |