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Peltier & Liu reply

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



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. 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.

    • W. R. Peltier
    •  & Yonggang Liu


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