Late inception of a resiliently oxygenated upper ocean
Rising oceanic and atmospheric oxygen levels through time have been crucial to enhanced habitability of surface Earth environments. Few redox proxies can track secular variations in dissolved oxygen concentrations ([O2]) around threshold levels for metazoan survival in the upper ocean. We present an...
| Những tác giả chính: | , , , , , , , , , , , , , , , , , , , , |
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| Định dạng: | Journal article |
| Ngôn ngữ: | English |
| Được phát hành: |
American Association for the Advancement of Science
2018
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| _version_ | 1826291095256956928 |
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| author | Lu, W Ridgwell, A Thomas, E Hardisty, DS Luo, G Algeo, TJ Saltzman, MR Gill, BC Shen, Y Ling, H-F Edwards, CT Whalen, MT Zhou, X Gutchess, KM Jin, L Rickaby, REM Jenkyns, HC Lyons, TW Lenton, TM Kump, LR Lu, Z |
| author_facet | Lu, W Ridgwell, A Thomas, E Hardisty, DS Luo, G Algeo, TJ Saltzman, MR Gill, BC Shen, Y Ling, H-F Edwards, CT Whalen, MT Zhou, X Gutchess, KM Jin, L Rickaby, REM Jenkyns, HC Lyons, TW Lenton, TM Kump, LR Lu, Z |
| author_sort | Lu, W |
| collection | OXFORD |
| description | Rising oceanic and atmospheric oxygen levels through time have been crucial to enhanced habitability of surface Earth environments. Few redox proxies can track secular variations in dissolved oxygen concentrations ([O2]) around threshold levels for metazoan survival in the upper ocean. We present an extensive compilation of iodine to calcium ratios (I/Ca) in marine carbonates. Our record supports a major rise in atmospheric pO2 at ~400 million years ago (Ma), and reveals a step-change in the oxygenation of the upper ocean to relatively sustainable near-modern conditions at ~200 Ma. An Earth system model demonstrates that a shift in organic matter remineralization to greater depths, which may have been due to increasing size and biomineralization of eukaryotic plankton, likely drove the I/Ca signals at ~200 Ma. |
| first_indexed | 2024-03-07T02:54:14Z |
| format | Journal article |
| id | oxford-uuid:aebceeed-b103-4588-8c13-ff0480686f79 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T02:54:14Z |
| publishDate | 2018 |
| publisher | American Association for the Advancement of Science |
| record_format | dspace |
| spelling | oxford-uuid:aebceeed-b103-4588-8c13-ff0480686f792022-03-27T03:44:40ZLate inception of a resiliently oxygenated upper oceanJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:aebceeed-b103-4588-8c13-ff0480686f79EnglishSymplectic Elements at OxfordAmerican Association for the Advancement of Science2018Lu, WRidgwell, AThomas, EHardisty, DSLuo, GAlgeo, TJSaltzman, MRGill, BCShen, YLing, H-FEdwards, CTWhalen, MTZhou, XGutchess, KMJin, LRickaby, REMJenkyns, HCLyons, TWLenton, TMKump, LRLu, ZRising oceanic and atmospheric oxygen levels through time have been crucial to enhanced habitability of surface Earth environments. Few redox proxies can track secular variations in dissolved oxygen concentrations ([O2]) around threshold levels for metazoan survival in the upper ocean. We present an extensive compilation of iodine to calcium ratios (I/Ca) in marine carbonates. Our record supports a major rise in atmospheric pO2 at ~400 million years ago (Ma), and reveals a step-change in the oxygenation of the upper ocean to relatively sustainable near-modern conditions at ~200 Ma. An Earth system model demonstrates that a shift in organic matter remineralization to greater depths, which may have been due to increasing size and biomineralization of eukaryotic plankton, likely drove the I/Ca signals at ~200 Ma. |
| spellingShingle | Lu, W Ridgwell, A Thomas, E Hardisty, DS Luo, G Algeo, TJ Saltzman, MR Gill, BC Shen, Y Ling, H-F Edwards, CT Whalen, MT Zhou, X Gutchess, KM Jin, L Rickaby, REM Jenkyns, HC Lyons, TW Lenton, TM Kump, LR Lu, Z Late inception of a resiliently oxygenated upper ocean |
| title | Late inception of a resiliently oxygenated upper ocean |
| title_full | Late inception of a resiliently oxygenated upper ocean |
| title_fullStr | Late inception of a resiliently oxygenated upper ocean |
| title_full_unstemmed | Late inception of a resiliently oxygenated upper ocean |
| title_short | Late inception of a resiliently oxygenated upper ocean |
| title_sort | late inception of a resiliently oxygenated upper ocean |
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