气候变化领域集成服务门户(CCPortal): Potential encoding of coupling between Milankovitch forcing and Earth's interior processes in the Phanerozoic eustatic sea-level record

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DOI	10.1016/j.earscirev.2021.103727
	Potential encoding of coupling between Milankovitch forcing and Earth's interior processes in the Phanerozoic eustatic sea-level record
	Boulila S.; Haq B.U.; Hara N.; Müller R.D.; Galbrun B.; Charbonnier G.
发表日期	2021
ISSN	00128252
卷号	220
英文摘要	The driving mechanisms of Earth's climate system at a multi-Myr timescale have received considerable attention since the 1980's as they are deemed to control large-amplitude climatic variations that result in severe biogeochemical disruptions, major sea-level variations, and the evolution of Earth's land- and seascapes through geological time. The commonly accepted mechanism for these changes derives from the evolution of Earth's coupled plate-mantle system. Connection between Earth's interior and external climate drivers, e.g., Milankovitch insolation forcing, has not been investigated at multi-Myr timescale, because tectonics and astronomical influences at these longer timescales have long been thought as independent pacemakers in the evolution of the Earth system. Here we have analyzed time-series from multiple geological datasets and found common periodicities of 10 and 35 Myr. Additionally, we have highlighted the modulation in amplitude of the 10 Myr cycle band by the 35 Myr cyclicity in sedimentary sea-level data. We then demonstrate the same physical amplitude modulation relationship between these two cyclicities in astronomical (Milankovitch) variations, and establish correlation between Milankovitch and sea-level variations at these two frequency bands. The 10 and 35 Myr cycles are prominent in the geological records, suggesting either unresolved fundamental Milankovitch periodicities, or reflecting a sedimentary energy-transfer process from higher to lower Milankovitch frequencies, as argued here via amplitude modulation analysis in both astronomical and sea-level data. Finally, we find a coherent correlation, at the 35 Myr cycle band, between Milankovitch, sea-level and geodynamic (plate subduction rate) variations, hinting at a coupling between Earth's interior and surface processes via Milankovitch paced climate. Thus, our findings point to a coupling between Milankovitch and Earth's internal forcings, at 10 to 10s of Myr. The most likely scenario that could link insolation-driven climate change to Earth's interior processes is Earth's interior feedbacks to astro-climatically driven mass changes on Earth's surface. We suggest that Earth's interior processes may drive large-amplitude sea-level changes, especially during greenhouse periods, by resonating to astro-climatically driven Earth's surface perturbations. © 2021 Elsevier B.V.
关键词	Earth's climate Milankovitch Multi-million year timescales Sea level Tectonics
英文关键词	climate effect; climate variation; data set; paleoclimate; Phanerozoic; sea level change; timescale
语种	英语
来源期刊	Earth Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203974
作者单位	Sorbonne Université, CNRS, Institut des Sciences de la Terre Paris, ISTeP, Paris, F-75005, France; ASD/IMCCE, CNRS-UMR8028, Observatoire de Paris, PSL University, Sorbonne Université, 77 Avenue Denfert-Rochereau, Paris, 75014, France; Smithsonian Institution, Washington, DC, United States; Département d'astronomie, Université de Genève, 51 Chemin de Pegasi b, Versoix, 1290, Switzerland; EarthByte Group, School of Geosciences, University of Sydney, Sydney, New South Wales 2006, Australia
推荐引用方式 GB/T 7714	Boulila S.,Haq B.U.,Hara N.,et al. Potential encoding of coupling between Milankovitch forcing and Earth's interior processes in the Phanerozoic eustatic sea-level record[J],2021,220.
APA	Boulila S.,Haq B.U.,Hara N.,Müller R.D.,Galbrun B.,&Charbonnier G..(2021).Potential encoding of coupling between Milankovitch forcing and Earth's interior processes in the Phanerozoic eustatic sea-level record.Earth Science Reviews,220.
MLA	Boulila S.,et al."Potential encoding of coupling between Milankovitch forcing and Earth's interior processes in the Phanerozoic eustatic sea-level record".Earth Science Reviews 220(2021).