Extended Data Fig. 7: Arctic and North Atlantic sea ice volume.
From: Atmospheric CO2 control of spontaneous millennial-scale ice age climate oscillations
Sea-ice-volume variations in the a) Arctic box and the b) North Atlantic box (see Supplementary Materials for box areas) for each of the different CO2 simulations. The vertical lines span the range between minimum and maximum sea-ice volume for each simulation. The black dots represent the mean volume of sea-ice throughout the whole simulation. The sea-ice volume follows the characteristic pattern of a system with a fold bifurcation and a control parameter (the atmospheric CO2 concentration).
