DOI: 10.1016/j.epsl.2018.08.041
Scopus记录号: 2-s2.0-85052898120
论文题名: Tracking variable sedimentation rates and astronomical forcing in Phanerozoic paleoclimate proxy series with evolutionary correlation coefficients and hypothesis testing
作者: Li M. ; Kump L.R. ; Hinnov L.A. ; Mann M.E.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 501 起始页码: 165
结束页码: 179
语种: 英语
英文关键词: astronomical forcing
; Devonian
; Late Triassic
; Paleocene–Eocene Thermal Maximum
; sedimentation rate
Scopus关键词: Geochronology
; Intelligent systems
; Inverse problems
; Iron
; Magnetic susceptibility
; Monte Carlo methods
; Statistical tests
; Stratigraphy
; Astronomical forcing
; Devonians
; Late Triassic
; Sedimentation rates
; Thermal maxima
; Sedimentation
; correlation
; cyclostratigraphy
; depositional environment
; Devonian
; Monte Carlo analysis
; paleoclimate
; sedimentation rate
; Triassic
; Belgium
; North America
英文摘要: This paper addresses two fundamental issues in cyclostratigraphy and paleoclimatology: identification of astronomical forcing in sequences of stratigraphic cycles, and accurate evaluation of variable sedimentation rates. The technique presented here considers these issues part of an inverse problem and estimates the product-moment correlation coefficient between the power spectra of astronomical solutions and paleoclimate proxy series across a range of test sedimentation rates. The number of contributing astronomical parameters in the estimate is also considered. Our estimation procedure tests the hypothesis that astronomical forcing had a significant impact on proxy records. The null hypothesis of no astronomical forcing is evaluated using a Monte Carlo simulation approach. The test is applied using a sliding stratigraphic window to track variable sedimentation rates along the paleoclimate proxy series, in a procedure termed “eCOCO” (evolutionary correlation coefficient) analysis. Representative models with constant and variable sedimentation rates, and pure noise and mixed signal and noise series are evaluated to demonstrate the robustness of the approach. The method is then applied to Cenozoic, Mesozoic and Paleozoic paleoclimate series. The Cenozoic case study focuses on a high-resolution Paleocene–Eocene iron concentration series from ODP Site 1262 (Leg 208) covering the Paleocene–Eocene Thermal Maximum and Eocene Thermal Maximum 2 events. The eCOCO time-calibrated iron series confirms previous findings of a role for long-term astronomical forcing of these Eocene events. The Mesozoic case study applies eCOCO to the classic Late Triassic Newark depth rank series of eastern North America. The estimated high-resolution sedimentation rate map in this case demonstrates a causal link between variations in depositional environment and sedimentation rate. Finally, the Paleozoic case study supports the cyclostratigraphic interpretation of a Devonian magnetic susceptibility series at La Thure, Belgium and provides new insights into changes of the depositional setting at this location. Taken together, eCOCO is a powerful tool for simultaneously evaluating sedimentation rates and astronomical forcing for paleoclimate series throughout the Phanerozoic. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109678
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Geosciences, The Pennsylvania State University, University Park, PA 16802, United States; Department of Atmospheric, Oceanic, and Earth Sciences, George Mason University, Fairfax, VA 22030, United States
Recommended Citation:
Li M.,Kump L.R.,Hinnov L.A.,et al. Tracking variable sedimentation rates and astronomical forcing in Phanerozoic paleoclimate proxy series with evolutionary correlation coefficients and hypothesis testing[J]. Earth and Planetary Science Letters,2018-01-01,501