气候变化领域集成服务门户(CCPortal): Time scale evaluation and the quantification of obliquity forcing

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DOI	10.1016/j.quascirev.2019.01.018
	Time scale evaluation and the quantification of obliquity forcing
	Zeeden C.; Meyers S.R.; Hilgen F.J.; Lourens L.J.; Laskar J.
发表日期	2019
ISSN	0277-3791
起始页码	100
结束页码	113
卷号	209
英文摘要	The geologic time scale serves as an essential instrument for reconstructing Earth history. Astrochronology, linking regular sedimentary alternations to theoretical quasi-periodic astronomical rhythms, often provides the highest resolution age models for strata that underlie the time scale. Although various methods for testing astronomically-tuned time scales exist, they often present challenges, such as the problem of circularity. Here, we introduce an approach to extract a reliable obliquity envelope from astronomically tuned data, avoiding the effects of frequency modulations that can artificially introduce astronomical beats. This approach includes (1) the application of a broad obliquity filter followed by (2) a Hilbert transform and (3) a low-pass filter of the amplitude envelope to (4) test the significance of correlation between amplitude envelope and astronomical solution. These data amplitudes provide a robust means to evaluate the climate response to obliquity forcing and, more specifically, to test the significance of correlation with the theoretical astronomical solution, in a manner similar to the phase-randomized surrogate approach previously introduced for the evaluation of precession tuning. Synthetic astronomical/ice-sheet models and several Quaternary climate proxy records – where obliquity can be a dominant component of astronomically driven climate variability – are used to demonstrate the feasibility of the proposed method and yield new insight into climate system evolution. © 2019 Elsevier Ltd
英文关键词	Astrochronology; Data analysis; Data treatment; Obliquity; Orbital climate forcing; Paleoclimatology; Quaternary; Tilt; Timescale testing
语种	英语
scopus关键词	Climatology; Data reduction; Low pass filters; Mathematical transformations; Orbits; Time measurement; Astrochronology; Climate forcings; Data treatment; Obliquity; Paleoclimatology; Quaternary; Tilt; Time-scales; Climate models; astronomy; chronology; climate forcing; climatology; data interpretation; obliquity; orbital forcing; paleoclimate; Quaternary; tilt; timescale
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151990
作者单位	IMCCE, Observatoire de Paris, PSL Research University, CNRS, Sorbonne Universités, UPMC Univ Paris 06, Univ Lille, Paris, 75014, France; Faculty of Geosciences, University of Utrecht, Utrecht, Netherlands; LIAG,Leibniz Institute for Applied Geophysics, Stilleweg 2, Hannover, 30655, Germany; Department of Geoscience, University of Wisconsin-Madison, Madison, WI, United States
推荐引用方式 GB/T 7714	Zeeden C.,Meyers S.R.,Hilgen F.J.,et al. Time scale evaluation and the quantification of obliquity forcing[J],2019,209.
APA	Zeeden C.,Meyers S.R.,Hilgen F.J.,Lourens L.J.,&Laskar J..(2019).Time scale evaluation and the quantification of obliquity forcing.Quaternary Science Reviews,209.
MLA	Zeeden C.,et al."Time scale evaluation and the quantification of obliquity forcing".Quaternary Science Reviews 209(2019).