Changing Antarctic waters could trigger steep rise in sea levels, page-9

Models develop and change as new information, hardware and algorithms are added and refined, and our understanding of the subject matter improves. The more recent models are no doubt more sophisticated than past efforts, as will models that are further developed into the future no doubt be an improvement on what we have today.

The natural world is complex, with "more "sophisticated" modelling it would be hoped that observed and generated data converge. It should be noted that in the article the model was verified with independent geological observations from the oceans off Antarctica.

Not sure walbrook whether you have heard of the term "isostacy". Anyway, the weight of the ice in (or on) the Antarctic has, by shear weight, forced the land surface below sea level, so warm currents can infiltrate the glaciers on land from beneath.

The ocean around the Antarctic is not -50C to -45C.

Glaciers form from compacted snowfall. When melting is greater than what is added by snowfall the glacier's size will decrease. Also a problem with seawater melting the glaciers from beneath is that the meltwater reduces the friction between the rock and glacier, with the potential for the glacier's advance towards the ocean to increase.