Nonlinear and chaotic ice ages: data vs speculations

Details Nonlinear and chaotic ice ages: data vs speculations Nonlinear and chaotic ice ages: data vs speculations

2010-03-15

arxiv.org/abs/1003.2942v1

Journal of Cosmology, 8, 1893-1905 (2010)

Physics

Atmospheric and Oceanic Physics

Scientific paper

It is shown that, the wavelet regression detrended fluctuations of the reconstructed temperature for the past 400,000 years (Antarctic ice cores data) are completely dominated by one-third subharmonic resonance, presumably related to Earth precession effect on the energy that the intertropical regions receive from the Sun. Effects of Galactic turbulence on the temperature fluctuations are also discussed. Direct evidence of chaotic response of the atmospheric CO_2 dynamics to obliquity periodic forcing has been found in a reconstruction of atmospheric CO_2 data (deep sea proxies), for the past 650,000 years.

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