Pumped-seawater energy storage system for low-lying islands

Pumped-hydro energy storage systems utilise surplus electricity to pump water up a hill as a way of storing energy. Is it possible to invert that principle to pump sea water out of an enclosure against the sea level as reference?

Supervisor name: 
Wolf-Gerrit Fruh
Supervisor and Deputy email addresses: 

Project Type:

Project location: 
Computer room or own computer
Deputy name: 
Gudrun Kocher