Originally Posted by
arearadar70
You seem knowledgable 73 Qanda. Correct me if I am wrong but when I did physics at school 60years ago, I`m sure I was taught that floating ice displaces its own volume in the water containing it. If that ice melts, its volume decreases thus the water level drops. This is surely true of the Arctic (floating) but not the Antarctic (on bedrock). ?
Floating ice displaces a volume of water equal to it's mass not it's volume. The mass remains constant when it melts. So yes the volume of the ice does reduce when it melts but the water level stays the same.
Aside: Most of the rise in sea level to date has been due to the water expanding due to the temperature rising rather than ice on land melting.