Was reading this article tonight:
Nasa forecast: Which cities will flood as ice melts? - BBC News
It struck me: Why would different cities be affected by differently melting ice masses? It had to be because "sea level" is not constant.
Digging further, I found this:
Sea Level not the same everywhere; up to 300 foot variation. - John Englander - Sea Level Rise Expert
Sea level varies by up to 300' globally! That is amazing.
I was in Thailand last week during the full moon and saw the extreme low tide. It was awesome to explore the ocean floor hundreds of meters out from the normal tide line. Lots of marine life that you don't normally get to see.