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Peltier & Liu reply

Nature volume 456, pages E9E10 (18 December 2008) | Download Citation

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Abstract

Replying to: P. F. Hoffman, J. W. Crowley, D. T. Johnston, D. S. Jones & D. P. Schrag Nature 456, 10.1038/nature07655 (2008); Y. Goddéris & Y. Donnadieu Nature 456, 10.1038/nature07653 (2008)

The first of several questionable assertions in the Comment of Hoffman et al.https://www.nature.com/articles/nature076531 on our paper2 is that our results are “sensitive to initial conditions and model parameters”. This references an undergraduate report3 in which this issue was not addressed. Figure 1 illustrates a sequence of trajectories of the nonlinear system. These are ‘attracted to’ the set of steady state solutions such that, following transient adjustment, the system locks-on to the oscillatory ‘slushball’ solution unless the initial CO2 concentration is extremely low or F21 , the control variable of the model that determines the sensitivity of the rate of remineralization to temperature changes, is supercritical. This first assertion is therefore misleading.

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  1. *Department of Physics, University of Toronto, Toronto, Ontario, Canada M5S-1A7.  peltier@atmosp.physics.utoronto.ca

    • W. R. Peltier
    •  & Yonggang Liu

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