Huh? This is sea ice. When sea ice melts it obviously has no effect on sea levels. It's already in the ocean. However, sea ice may bottle up glaciers, keeping them on land -- with this shelf out of the way, those glaciers may flow into the ocean, something that would, obviously, raise sea levels.
How does sea ice “bottle up” glaciers?
Sea ice is highly unstable and much softer than fresh water ice. In addition to that, there would be nothing to stop a glacier flow from pushing sea borne ice out of it’s way.
What stops most glacier movement is terrain. Mountain ranges are mostly responsible for holding Antarctica’s ice on the continent. There are a few ice flows where there are breaks in the mountainous terrain, so the ice flows to the ocean at those points.
So you don't like my science? Too bad. The Zuben house established a consensus and we predict the coastal cities will be flooded. Anything less is bunk, according to our consensus.
Study Newton’s 3rd law