When land based ice melts the sea level will go down. Isostacy is why.
Isostacy is the rebound of the land caused by the release of pressure caused by removal of the ice mass.
Isostatic processes take millions of years (i.e. Norway is currently undergoing isostacy - at a rate of about 1-10mm per year) - sea-level rises caused by land-ice melting takes 10's of years, so there will be a sea level rise if this happens.
The isostatic offset will be immeasurable.
Isostacy is the rebound of the land caused by the release of pressure caused by removal of the ice mass.
Isostatic processes take millions of years (i.e. Norway is currently undergoing isostacy - at a rate of about 1-10mm per year) - sea-level rises caused by land-ice melting takes 10's of years, so there will be a sea level rise if this happens.
The isostatic offset will be immeasurable.