Snowball Earth aftermath : ocean dynamics and carbon cycling under extreme greenhouse conditions Abstract: When a snowball Earth deglaciates through a very high atmospheric CO2 concentration the resulting inflow of freshwater leads to a stably stratified ocean and the strong greenhouse conditions drive the climate into a very warm state. Here we use a coupled atmosphere ocean general circulation model applying different scenarios for the evolution of atmospheric CO2 to conduct the first simulation of the climate and the three dimensional ocean circulation in the aftermath of the Marinoan snowball Earth.