DOI: 10.1016/j.quascirev.2018.05.019
Scopus记录号: 2-s2.0-85048285437
论文题名: Using Holo-Hilbert spectral analysis to quantify the modulation of Dansgaard-Oeschger events by obliquity
作者: Deng J. ; Wu Z. ; Zhang M. ; Huang N.E. ; Wang S. ; Qiao F.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 192 起始页码: 282
结束页码: 299
语种: 英语
英文关键词: Amplitude modulation
; Antarctica
; Dansgaard-oeschger (DO) events
; Data analysis
; Data treatment
; Greenland
; Holo-hilbert spectral analysis
; Obliquity forcing
; Paleoclimatology
; Phase preference
; Pleistocene
Scopus关键词: Data reduction
; Spectrum analysis
; Antarctica
; Dansgaard-oeschger (DO) events
; Data treatment
; Greenland
; Hilbert spectral analysis
; Obliquity forcing
; Paleoclimatology
; Phase preference
; Pleistocene
; Amplitude modulation
; amplitude
; astronomy
; Dansgaard-Oeschger cycle
; data mining
; ice core
; paleoclimate
; Pleistocene
; polar region
; proxy climate record
; spectral analysis
; Antarctica
; Arctic
; Greenland
英文摘要: Astronomical forcing (obliquity and precession) has been thought to modulate Dansgaard-Oeschger (DO) events, yet the detailed quantification of such modulations has not been examined. In this study, we apply the novel Holo-Hilbert Spectral Analysis (HHSA) to five polar ice core records, quantifying astronomical forcing's time-varying amplitude modulation of DO events and identifying the preferred obliquity phases for large amplitude modulations. The unique advantages of HHSA over the widely used windowed Fourier spectral analysis for quantifying astronomical forcing's nonlinear modulations of DO events is first demonstrated with a synthetic data that closely resembles DO events recorded in Greenland ice cores (NGRIP, GRIP, and GISP2 cores on GICC05 modelext timescale). The analysis of paleoclimatic proxies show that statistically significantly more frequent DO events, with larger amplitude modulation in the Greenland region, tend to occur in the decreasing phase of obliquity, especially from its mean value to its minimum value. In the eastern Antarctic, although statistically significantly more DO events tend to occur in the decreasing obliquity phase in general, the preferred phase of obliquity for large amplitude modulation on DO events is a segment of the increasing phase near the maximum obliquity, implying that the physical mechanisms of DO events may be different for the two polar regions. Additionally, by using cross-spectrum and magnitude-squared analyses, Greenland DO mode at a timescale of about 1400 years leads the Antarctic DO mode at the same timescale by about 1000 years. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112142
Appears in Collections: 气候减缓与适应
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作者单位: First Institute of Oceanography, State Oceanic Administration, Qingdao, 266061, China; Laboratory for Regional Oceanography and Numerical Modelling, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266071, China; Key Laboratory of Data Analysis and Applications, State Oceanic Administration, Qingdao, 266061, China; Department of Earth, Ocean and Atmospheric Science & Center for Ocean-Atmospheric Prediction Studies, Florida State University, Tallahassee, FL 32306, United States; Key Laboratory of Marine Sciences and Numerical Modelling, State Oceanic Administration, Qingdao, 266061, China
Recommended Citation:
Deng J.,Wu Z.,Zhang M.,et al. Using Holo-Hilbert spectral analysis to quantify the modulation of Dansgaard-Oeschger events by obliquity[J]. Quaternary Science Reviews,2018-01-01,192