Climate change - The carbon equation

What will happen to the increasing amounts of carbon being emitted into the atmosphere in the form of CO2? The question is a pressing one, both politically and economically, given the international endeavour to reduce emissions of CO2and minimize the consequent predicted warming. Models of the effects of environmental change on carbon balance in the oceans and on land, running into the middle of the next century, provide new estimates of the CO2flux in both cases. Not only do these modelled fluxes differ from those used as base cases at present, but the approaches used highlight the differences, and respective shortcomings, in models of marine and terrestrial processes.