Narc, are you saying air can support water?
Air is less dense than water.
It cannot hold water up.
Water rests in water, where water supports water and makes the water neutrally buoyant. However, if the oceans were to rise, air would start supporting multiple layers of water, which it cannot because it is not as dense.
Think of this. If water were not part of anything, if there was only one water molecule, would it be weightless?
No.
It has weight.
Therefore, though a water molecule may be buoyant relative to the other water molecules supported on top of each other by the ground, they cannot rise because each individual water molecule cannot be supported by air.
Because a water molecule cannot be supported by air, the bottom layer of the ocean cannot be supported by air.
Same for the next layer.
And the next.
And the next.