Plio-Pleistocene time evolution of the 100-ky cycle in marine paleoclimate records

Details Plio-Pleistocene time evolution of the 100-ky cycle in marine paleoclimate records Plio-Pleistocene time evolution of the 100-ky cycle in marine paleoclimate records

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992orci.nasa...79p&link_type=abstract

In NASA. Goddard Space Flight Center, Orbital, Rotational and Climatic Interactions p 79-87 (SEE N93-18962 06-46)

Physics

Climate Change, Dynamic Models, Ice Environments, Paleoclimatology, Spectrum Analysis, Time Series Analysis, Periodic Variations, Planetary Evolution, Precession

Scientific paper

To constrain theories for the dynamical evolution of global ice mass through the late Neogene, it is important to determine whether major changes in the record were gradual or rapid. Of particular interest is the evolution of the near 100-ky ice age cycle in the middle Pleistocene. We have applied a new technique based on multiple taper spectrum analysis which allows us to model the time evolution of quasi-periodic signals. This technique uses both phase and amplitude information, and enables us to address the question of abrupt versus gradual onset of the 100-ky periodicity in the middle Pleistocene.

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