re: #24 Mich-again
The ice is fresh water. When it melts it affects the salinity of the oceans which disrupts ocean currents. I have read an interesting theory that says the first casualty of global warming will be Northern Europe. As the story goes there will be a deep freeze there from the changing ocean currents.
You are correct, the warm surface waters will submerge before warming Europe. That why climate change is a better name, some area’s may actually get cooler.