气候变化领域集成服务门户(CCPortal): Stepwise Earth oxygenation is an inherent property of global biogeochemical cycling

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DOI	10.1126/science.aax6459
	Stepwise Earth oxygenation is an inherent property of global biogeochemical cycling
	Alcott L.J.; Mills B.J.W.; Poulton S.W.
发表日期	2019
ISSN	0036-8075
起始页码	1333
结束页码	1337
卷号	366 期号:6471
英文摘要	Oxygenation of Earth's atmosphere and oceans occurred across three major steps during the Paleoproterozoic, Neoproterozoic, and Paleozoic eras, with each increase having profound consequences for the biosphere. Biological or tectonic revolutions have been proposed to explain each of these stepwise increases in oxygen, but the principal driver of each event remains unclear. Here we show, using a theoretical model, that the observed oxygenation steps are a simple consequence of internal feedbacks in the long-term biogeochemical cycles of carbon, oxygen, and phosphorus, and that there is no requirement for a specific stepwise external forcing to explain the course of Earth surface oxygenation. We conclude that Earth's oxygenation events are entirely consistent with gradual oxygenation of the planetary surface after the evolution of oxygenic photosynthesis. © 2019 The Authors.
英文关键词	organic carbon; oxygen; phosphorus; biogeochemical cycle; biosphere; Earth; long-term change; oxygenation; Paleozoic; Article; biogeochemical cycling; biosphere; blood oxygen tension; comparative study; geology; mineralization; nutrient availability; oscillation; oxidation reduction potential; oxygenation; phase partitioning; photosynthesis; priority journal; sedimentation rate; steady state; surface area; theoretical model; weathering
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/242791
作者单位	School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, United Kingdom
推荐引用方式 GB/T 7714	Alcott L.J.,Mills B.J.W.,Poulton S.W.. Stepwise Earth oxygenation is an inherent property of global biogeochemical cycling[J],2019,366(6471).
APA	Alcott L.J.,Mills B.J.W.,&Poulton S.W..(2019).Stepwise Earth oxygenation is an inherent property of global biogeochemical cycling.Science,366(6471).
MLA	Alcott L.J.,et al."Stepwise Earth oxygenation is an inherent property of global biogeochemical cycling".Science 366.6471(2019).