Weird thing about it is the Arctic Sea ice melting won't raise the sea level one inch, but the in-rush of melted fresh water will melt the Greenland and Antarctic faster and then we am fucked people.
So we'll have people saying "hey look, it's fine!"...
There are lots of potential positive feedback loops;
Blue water at the poles absorbs heat much better than white ice.
Excessive methane released from permafrost. Methane is 30 times more potent as a greenhouse gas than carbon dioxide.
Carbon dioxide concentration in the atmosphere is not only growing, but the rate of growth is accelerating.
Desertification is advancing around the world. Deserts are hotter than land covered with vegetation.
It's well known that cities exhibit a great island effect, where the temperatures in the city are higher than the surrounding countryside due to asphalt and concrete absorbing heat. Cities are dramatically expanding around the world.
The movement of glaciers on Greenland and Antarctica are accelerating. The largest iceberg ever observed is in the process of breaking off the Larsen C ice shelf there. When this happened to Larsen A and B, both ice shelves subsequently broke up completely.
Glaciers around the world are receding and many have vanished. Less white and more dark land...
Some scientists are very concerned that warming sea temperatures might trigger huge methane blowouts on the sea floor. Methane hydrate is stable under high pressure and low temperature. If temperatures rise it sublimates directly into gas, blasting huge holes in the ocean floor.
This is an incomplete list.