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Plio-Pleistocene time evolution of the 100-kyr cycle in marine paleoclimate recordsA new time-series analysis technique (called envelope inversion), which is based on multiple taper spectral analysis, is used to address the question of an abrupt versus a gradual onset of the 100-kyr ice-age periodicity in the middle Pleistocene. Three long (greater than 2.6 m.y.) time series from Deep Sea Drilling Project site 607 (midlatitude Atlantic) and Ocean Drilling Program site 677 (equatorial Pacific) were analyzed using delta(O-18) records. Results do not yield compelling evidence for an abrupt change in the 100-kyr delta(O-18) signal. Rather, the results suggest that the 100-kyr delta(O-18) cycle is phase-locked with the 124-kyr eccentricity cycle some 300-400 kyr prior to its late Pleistocene growth in amplitude and phase lock with the 95-kyr eccentricity cycle.
Document ID
19930040554
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Park, Jeffrey
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Maasch, Kirk A.
(Yale Univ. New Haven, CT, United States)
Date Acquired
August 16, 2013
Publication Date
January 10, 1993
Publication Information
Publication: Journal of Geophysical Research
Volume: 98
Issue: B1
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
93A24551
Funding Number(s)
CONTRACT_GRANT: NSF EAR-86-57206
CONTRACT_GRANT: NSF ATM-88-02630
CONTRACT_GRANT: NAG8-785
Distribution Limits
Public
Copyright
Other

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