Articles | Volume 15, issue 6
Clim. Past, 15, 1959–1983, 2019
https://doi.org/10.5194/cp-15-1959-2019
Clim. Past, 15, 1959–1983, 2019
https://doi.org/10.5194/cp-15-1959-2019

Research article 22 Nov 2019

Research article | 22 Nov 2019

Bispectra of climate cycles show how ice ages are fuelled

Diederik Liebrand and Anouk T. M. de Bakker

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Cited articles

Abe-Ouchi, A., Saito, F., Kawamura, K., Raymo, M. E., Okuno, J., Takahashi, K., and Blatter, H.: Insolation-driven 100 000-year glacial cycles and hysteresis of ice-sheet volume, Nature, 500, 190–194, https://doi.org/10.1038/nature12374, 2013. 
Agassiz, L.: Études sur les glaciers, Neuchâtel, Jent et Gassmann, available at: https://archive.org/details/etudessurlesgla00agasgoog/page/n10 (last access: 30 March 2019), 1840. 
Ahn, S., Khider, D., Lisiecki, L. E., and Lawrence, C. E.: A probabilistic Pliocene–Pleistocene stack of benthic δ18O using a profile hidden Markov model, Dynamics and Statistics of the Climate System, 2, 1–16, https://doi.org/10.1093/climsys/dzx002, 2017. 
Bak, P.: How nature works: the science of self-organized criticality, Copernicus, New York, 1996. 
Bak, P., Tang, C., and Wiesenfeld, K.: Self-organized criticality – an explanation of 1/f noise, Phys. Rev. Lett., 59, 381–384, https://doi.org/10.1103/PhysRevLett.59.381, 1987. 
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We present a new analysis and interpretation of a well-established climate record that spans the past 5 million years. We describe how the energy the Earth receives from the Sun is transferred among climate cycles with different duration. This analysis offers new insights into the complex evolution of the global climate system and land-ice volumes during this time. Furthermore, it provides a more complete solution to the long-standing 40 000- and ~100 000-year problems of the ice ages.