[rock58seg]

if things stay exactly as they are today ... within the next 30 years the Arctic ice sheet is gone

And it won't raise the ocean 1 Cm since it floats.

[DBrow]

And it won't raise the ocean 1 Cm since it floats.

The real danger is the temperature change. If the temp changes too much it will kill off all of the sponges, causing them to release water back to the ocean. When that happens Pasadena will be the new coastline in South Bay, just like it was a few million years ago.