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DOI | 10.1073/pnas.1715278115 |
Uranium isotope evidence for two episodes of deoxygenation during Oceanic Anoxic Event 2 | |
Clarkson, Matthew O.1,7; Stirling, Claudine H.1; Jenkyns, Hugh C.2; Dickson, Alexander J.2,3; Porcelli, Don2; Moy, Christopher M.4; von Strandmann, Philip A. E. Pogge5; Cooke, Ilsa R.1; Lenton, Timothy M.6 | |
2018-03-20 | |
发表期刊 | PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA |
ISSN | 0027-8424 |
出版年 | 2018 |
卷号 | 115期号:12页码:2918-2923 |
文章类型 | Article |
语种 | 英语 |
国家 | New Zealand; England; Switzerland |
英文摘要 | Oceanic Anoxic Event 2 (OAE 2), occurring similar to 94 million years ago, was one of the most extreme carbon cycle and climatic perturbations of the Phanerozoic Eon. It was typified by a rapid rise in atmospheric CO2, global warming, and marine anoxia, leading to the widespread devastation of marine ecosystems. However, the precise timing and extent to which oceanic anoxic conditions expanded during OAE 2 remains unresolved. We present a record of global ocean redox changes during OAE 2 using a combined geochemical and carbon cycle modeling approach. We utilize a continuous, high-resolution record of uranium isotopes in pelagic and platform carbonate sediments to quantify the global extent of seafloor anoxia during OAE 2. This dataset is then compared with a dynamic model of the coupled global carbon, phosphorus, and uranium cycles to test hypotheses for OAE 2 initiation. This unique approach highlights an intra-OAE complexity that has previously been underconstrained, characterized by two expansions of anoxia separated by an episode of globally significant reoxygenation coincident with the "Plenus Cold Event." Each anoxic expansion event was likely driven by rapid atmospheric CO2 injections from multiphase Large Igneous Province activity. |
英文关键词 | oceanic anoxia OAE uranium isotopes biogeochemical model carbon cycle |
领域 | 地球科学 ; 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427829500047 |
WOS关键词 | BIOGEOCHEMICAL CYCLES ; MARINE CARBONATES ; GLOBAL EXTENT ; FRACTIONATION ; U-238/U-235 ; OXYGEN ; STRATIGRAPHY ; PHOSPHORUS ; REDOX ; SEA |
WOS类目 | Multidisciplinary Sciences |
WOS研究方向 | Science & Technology - Other Topics |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/204883 |
专题 | 地球科学 资源环境科学 气候变化 |
作者单位 | 1.Univ Otago, Dept Chem, Dunedin 9054, New Zealand; 2.Univ Oxford, Dept Earth Sci, Oxford OX1 3AN, England; 3.Royal Holloway Univ London, Dept Earth Sci, Egham TW20 0EX, Surrey, England; 4.Univ Otago, Dept Geol, Dunedin 9054, New Zealand; 5.Univ London, Univ Coll London & Birkbeck, Inst Earth & Planetary Sci, London Geochem & Isotope Ctr, London WC1E 6BT, England; 6.Univ Exeter, Coll Life & Environm Sci, Earth Syst Sci, Exeter EX4 4QE, Devon, England; 7.ETHZ, Dept Earth Sci, Inst Geochem & Petr, CH-8092 Zurich, Switzerland |
推荐引用方式 GB/T 7714 | Clarkson, Matthew O.,Stirling, Claudine H.,Jenkyns, Hugh C.,et al. Uranium isotope evidence for two episodes of deoxygenation during Oceanic Anoxic Event 2[J]. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2018,115(12):2918-2923. |
APA | Clarkson, Matthew O..,Stirling, Claudine H..,Jenkyns, Hugh C..,Dickson, Alexander J..,Porcelli, Don.,...&Lenton, Timothy M..(2018).Uranium isotope evidence for two episodes of deoxygenation during Oceanic Anoxic Event 2.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,115(12),2918-2923. |
MLA | Clarkson, Matthew O.,et al."Uranium isotope evidence for two episodes of deoxygenation during Oceanic Anoxic Event 2".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 115.12(2018):2918-2923. |
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