Indian Ocean glacial deoxygenation and respired carbon accumulation during mid-late Quaternary ice ages
Abstract Reconstructions of ocean oxygenation are critical for understanding the role of respired carbon storage in regulating atmospheric CO2. Independent sediment redox proxies are essential to assess such reconstructions. Here, we present a long magnetofossil record from the eastern Indian Ocean...
| Main Authors: | , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-08-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-023-40452-1 |
| _version_ | 1797558063698280448 |
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| author | Liao Chang Babette A. A. Hoogakker David Heslop Xiang Zhao Andrew P. Roberts Patrick De Deckker Pengfei Xue Zhaowen Pei Fan Zeng Rong Huang Baoqi Huang Shishun Wang Thomas A. Berndt Melanie Leng Jan-Berend W. Stuut Richard J. Harrison |
| author_facet | Liao Chang Babette A. A. Hoogakker David Heslop Xiang Zhao Andrew P. Roberts Patrick De Deckker Pengfei Xue Zhaowen Pei Fan Zeng Rong Huang Baoqi Huang Shishun Wang Thomas A. Berndt Melanie Leng Jan-Berend W. Stuut Richard J. Harrison |
| author_sort | Liao Chang |
| collection | DOAJ |
| description | Abstract Reconstructions of ocean oxygenation are critical for understanding the role of respired carbon storage in regulating atmospheric CO2. Independent sediment redox proxies are essential to assess such reconstructions. Here, we present a long magnetofossil record from the eastern Indian Ocean in which we observe coeval magnetic hardening and enrichment of larger, more elongated, and less oxidized magnetofossils during glacials compared to interglacials over the last ~900 ka. Our multi-proxy records of redox-sensitive magnetofossils, trace element concentrations, and benthic foraminiferal Δδ13C consistently suggest a recurrence of lower O2 in the glacial Indian Ocean over the last 21 marine isotope stages, as has been reported for the Atlantic and Pacific across the last glaciation. Consistent multi-proxy documentation of this repeated oxygen decline strongly supports the hypothesis that increased Indian Ocean glacial carbon storage played a significant role in atmospheric CO2 cycling and climate change over recent glacial/interglacial timescales. |
| first_indexed | 2024-03-10T17:25:09Z |
| format | Article |
| id | doaj.art-3c06d4eccdc74ec8872ea8ab88b8f369 |
| institution | Directory Open Access Journal |
| issn | 2041-1723 |
| language | English |
| last_indexed | 2024-03-10T17:25:09Z |
| publishDate | 2023-08-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj.art-3c06d4eccdc74ec8872ea8ab88b8f3692023-11-20T10:11:20ZengNature PortfolioNature Communications2041-17232023-08-0114111110.1038/s41467-023-40452-1Indian Ocean glacial deoxygenation and respired carbon accumulation during mid-late Quaternary ice agesLiao Chang0Babette A. A. Hoogakker1David Heslop2Xiang Zhao3Andrew P. Roberts4Patrick De Deckker5Pengfei Xue6Zhaowen Pei7Fan Zeng8Rong Huang9Baoqi Huang10Shishun Wang11Thomas A. Berndt12Melanie Leng13Jan-Berend W. Stuut14Richard J. Harrison15Laboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking UniversityThe Lyell Centre, Heriot-Watt UniversityResearch School of Earth Sciences, The Australian National UniversityResearch School of Earth Sciences, The Australian National UniversityResearch School of Earth Sciences, The Australian National UniversityResearch School of Earth Sciences, The Australian National UniversityLaboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking UniversityLaboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking UniversityLaboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking UniversityLaboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking UniversityLaboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking UniversityLaboratory of Orogenic Belts and Crustal Evolution, School of Earth and Space Sciences, Peking UniversityDepartment of Geophysics, School of Earth and Space Sciences, Peking UniversityNational Environmental Isotope Facility, British Geological SurveyNIOZ‐Royal Netherlands Institute for Sea Research and Utrecht UniversityDepartment of Earth Sciences, University of CambridgeAbstract Reconstructions of ocean oxygenation are critical for understanding the role of respired carbon storage in regulating atmospheric CO2. Independent sediment redox proxies are essential to assess such reconstructions. Here, we present a long magnetofossil record from the eastern Indian Ocean in which we observe coeval magnetic hardening and enrichment of larger, more elongated, and less oxidized magnetofossils during glacials compared to interglacials over the last ~900 ka. Our multi-proxy records of redox-sensitive magnetofossils, trace element concentrations, and benthic foraminiferal Δδ13C consistently suggest a recurrence of lower O2 in the glacial Indian Ocean over the last 21 marine isotope stages, as has been reported for the Atlantic and Pacific across the last glaciation. Consistent multi-proxy documentation of this repeated oxygen decline strongly supports the hypothesis that increased Indian Ocean glacial carbon storage played a significant role in atmospheric CO2 cycling and climate change over recent glacial/interglacial timescales.https://doi.org/10.1038/s41467-023-40452-1 |
| spellingShingle | Liao Chang Babette A. A. Hoogakker David Heslop Xiang Zhao Andrew P. Roberts Patrick De Deckker Pengfei Xue Zhaowen Pei Fan Zeng Rong Huang Baoqi Huang Shishun Wang Thomas A. Berndt Melanie Leng Jan-Berend W. Stuut Richard J. Harrison Indian Ocean glacial deoxygenation and respired carbon accumulation during mid-late Quaternary ice ages Nature Communications |
| title | Indian Ocean glacial deoxygenation and respired carbon accumulation during mid-late Quaternary ice ages |
| title_full | Indian Ocean glacial deoxygenation and respired carbon accumulation during mid-late Quaternary ice ages |
| title_fullStr | Indian Ocean glacial deoxygenation and respired carbon accumulation during mid-late Quaternary ice ages |
| title_full_unstemmed | Indian Ocean glacial deoxygenation and respired carbon accumulation during mid-late Quaternary ice ages |
| title_short | Indian Ocean glacial deoxygenation and respired carbon accumulation during mid-late Quaternary ice ages |
| title_sort | indian ocean glacial deoxygenation and respired carbon accumulation during mid late quaternary ice ages |
| url | https://doi.org/10.1038/s41467-023-40452-1 |
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