> seriously, how impractical is it for sub-arctic nuclear power plants to convert ocean water into icebergs and... Very impractical, to the point where I wonde

> seriously, how impractical is it for sub-arctic nuclear power plants to convert ocean water into icebergs and... Very impractical, to the point where I wonder if I'm missing some sarcasm in your comment. The amounts of water/ice involved are absolutely huge and due to basic thermodynamics you have to heat up some stuff to cool other stuff (and heat everything overall due to inefficiency). Even if it was doable, other approaches would be a lot easier and more effective. What might be practical is spraying chemicals into the atmosphere (e.g. above the caps) or throwing tiny glass marbles on the ice to reflect more light and keep it from being ice-free in the summer.