Couple ideas come to mind. First, you could build floating humidifiers that would pump the water into the air over oceans. When it comes down after evaporating, it comes down over water. You could do the same thing above the Arctic circle or around Antarctica and get the same result, plus adding to the snow cover and ice at the poles that is melting so fast. It all depends on where you put the machines.
Couple ideas come to mind. First, you could build floating humidifiers that would pump the water into the air over oceans. When it comes down after evaporating, it comes down over water. You could do the same thing above the Arctic circle or around Antarctica and get the same result, plus adding to the snow cover and ice at the poles that is melting so fast. It all depends on where you put the machines.