FIGURE 4. Late Precambrian (Neoproterozoic) climate simulations.
From the following article:
Neoproterozoic 'snowball Earth' simulations with a coupled climate/ice-sheet model
William T. Hyde, Thomas J. Crowley, Steven K. Baum and W. Richard Peltier
Nature 405, 425-429(25 May 2000)
doi:10.1038/35013005
a, Ice extent at equilibrium (Mollweide projection) for a 'snowball Earth' simulation. b, Annually averaged temperature for a GCM Neoproterozoic simulation using the above ice sheets as a lower boundary condition. A considerable area of open water exists in the tropics, though the ice sheets are almost everywhere below the melting point. c, Annually averaged precipitation in the GCM experiment. The cold temperatures and restricted area of open water result in a precipitation field which is less than 0.06 mm d -1 over the ice-sheet accumulation zone.
