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DOI	10.1038/s41467-021-24439-4
	Orbital forcing of ice sheets during snowball Earth
	Mitchell R.N.; Gernon T.M.; Cox G.M.; Nordsvan A.R.; Kirscher U.; Xuan C.; Liu Y.; Liu X.; He X.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	The snowball Earth hypothesis—that a runaway ice-albedo feedback can cause global glaciation—seeks to explain low-latitude glacial deposits, as well as geological anomalies including the re-emergence of banded iron formation and “cap” carbonates. One of the most significant challenges to snowball Earth has been sedimentological cyclicity that has been taken to imply more climate dynamics than expected when the ocean is completely covered in ice. However, recent climate models suggest that as atmospheric CO2 accumulates, the snowball climate system becomes sensitive to orbital forcing. Here we show the presence of nearly all Milankovitch (orbital) cycles preserved in stratified banded iron formation deposited during the Sturtian snowball Earth. These results provide evidence for orbitally forced cyclicity of global ice sheets that resulted in periodic oxidation of ferrous iron. Orbital glacial advance and retreat cycles provide a simple mechanism to reconcile both the sedimentary dynamics and the enigmatic survival of multicellular life during snowball Earth. © 2021, The Author(s).
语种	英语
scopus关键词	ferric ion; iron; banded iron formation; carbon dioxide; cyclicity; glacier retreat; ice sheet; iron; oxidation; sedimentation; Article; atmosphere; force; glaciation; ice sheet; magnetism; oxidation; stratigraphy; Sturtian; survival; time series analysis
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/251391
作者单位	State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China; Earth Dynamics Research Group, The Institute for Geoscience Research (TIGeR), Department of Earth and Planetary Sciences, Curtin University, Perth, WA, Australia; School of Ocean and Earth Science, University of Southampton, Southampton, United Kingdom; Department of Earth Sciences, University of Hong Kong, Pokfulam, Hong Kong; Department of Geosciences, Eberhard Karls University Tübingen, Tübingen, Germany; School of Geoscience and Survey Engineering, China University of Mining and Technology (Beijing), Beijing, China
推荐引用方式 GB/T 7714	Mitchell R.N.,Gernon T.M.,Cox G.M.,et al. Orbital forcing of ice sheets during snowball Earth[J],2021,12(1).
APA	Mitchell R.N..,Gernon T.M..,Cox G.M..,Nordsvan A.R..,Kirscher U..,...&He X..(2021).Orbital forcing of ice sheets during snowball Earth.Nature Communications,12(1).
MLA	Mitchell R.N.,et al."Orbital forcing of ice sheets during snowball Earth".Nature Communications 12.1(2021).