DOI: 10.1016/j.quascirev.2019.01.018
Scopus记录号: 2-s2.0-85062222720
论文题名: Time scale evaluation and the quantification of obliquity forcing
作者: Zeeden C. ; Meyers S.R. ; Hilgen F.J. ; Lourens L.J. ; Laskar J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2019
卷: 209 起始页码: 100
结束页码: 113
语种: 英语
英文关键词: Astrochronology
; Data analysis
; Data treatment
; Obliquity
; Orbital climate forcing
; Paleoclimatology
; Quaternary
; Tilt
; Timescale testing
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
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 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117352
Appears in Collections: 气候变化与战略
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Recommended Citation:
Zeeden C.,Meyers S.R.,Hilgen F.J.,et al. Time scale evaluation and the quantification of obliquity forcing[J]. Quaternary Science Reviews,2019-01-01,209