Surface currents are driven by
wind
density
salinity
temperature
user: evaporation
adds water to the atmosphere
is the change from a gas to a liquid
happens equally all over the globe
happens more slowly in warm areas than cool ones

Surface ocean currents are driven by winds that blow in certain patterns. They are caused by the Earth’s spin and the Coriolis effect. Evaporation adds water to the atmosphere. It is the change from liquid to gas wherein liquid molecules tends to go the gas phase and increases the number of molecules.

Gas will most likely  fill the container