Incidentally, salty sea water and clean melt water have different densities, so losing sea ice does in fact raise sea levels, though not as much as land ice loss. (slate.com)
In light of these observational facts, it is unsettling that neither quantitative prediction of future land ice loss nor credible estimation of an upper bound of future sea level are possible (IPCC, 2007). (searcharcticscience.org)
Correcting this situation requires a predictive understanding of the processes responsible for land ice loss. (searcharcticscience.org)