气候变化领域集成服务门户(CCPortal): Upper limits on the extent of seafloor anoxia during the PETM from uranium isotopes

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DOI	10.1038/s41467-020-20486-5
	Upper limits on the extent of seafloor anoxia during the PETM from uranium isotopes
	Clarkson M.O.; Lenton T.M.; Andersen M.B.; Bagard M.-L.; Dickson A.J.; Vance D.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	The Paleocene Eocene Thermal Maximum (PETM) represents a major carbon cycle and climate perturbation that was associated with ocean de-oxygenation, in a qualitatively similar manner to the more extensive Mesozoic Oceanic Anoxic Events. Although indicators of ocean de-oxygenation are common for the PETM, and linked to biotic turnover, the global extent and temporal progression of de-oxygenation is poorly constrained. Here we present carbonate associated uranium isotope data for the PETM. A lack of resolvable perturbation to the U-cycle during the event suggests a limited expansion of seafloor anoxia on a global scale. We use this result, in conjunction with a biogeochemical model, to set an upper limit on the extent of global seafloor de-oxygenation. The model suggests that the new U isotope data, whilst also being consistent with plausible carbon emission scenarios and observations of carbon cycle recovery, permit a maximum ~10-fold expansion of anoxia, covering <2% of seafloor area. © 2021, The Author(s).
语种	英语
scopus关键词	isotope; uranium; anoxia; Article; biogeochemical cycle; critical thermal maximum; Eocene; nonhuman; oxygenation; Paleocene; Trachinotus falcatus
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250783
作者单位	Department of Earth Sciences, ETHZ, Zurich, 8092, Switzerland; Global Systems Institute, University of Exeter, Exeter, EX4 4QE, United Kingdom; School of Earth and Ocean Sciences, University of Cardiff, Cardiff, CF10 3AT, United Kingdom; School of Environment, Earth and Ecosystem Sciences, The Open University, Milton Keynes, MK7 6AA, United Kingdom; Department of Earth Science, University of Cambridge, Cambridge, CB2 3EQ, United Kingdom; Department of Earth Sciences, Royal Holloway University of London, Egham, TW20 0EX, United Kingdom
推荐引用方式 GB/T 7714	Clarkson M.O.,Lenton T.M.,Andersen M.B.,et al. Upper limits on the extent of seafloor anoxia during the PETM from uranium isotopes[J],2021,12(1).
APA	Clarkson M.O.,Lenton T.M.,Andersen M.B.,Bagard M.-L.,Dickson A.J.,&Vance D..(2021).Upper limits on the extent of seafloor anoxia during the PETM from uranium isotopes.Nature Communications,12(1).
MLA	Clarkson M.O.,et al."Upper limits on the extent of seafloor anoxia during the PETM from uranium isotopes".Nature Communications 12.1(2021).