The suction that lifts water is created by the weight of air pressing down on the ocean’s surface, and air pressure isn’t strong enough to lift a column of water more than about 10 meters high. By the time your column of water reached 10 meters or so, the surface wouldn’t lift any higher no matter how much you lifted the enclosure. Instead, a vacuum would open up at the top and the water at the surface would start to boil in the low pressure.
