It seems the oceans of the world are doing their best to show that global warming is a fact. It is common knowledge that the world waters are rising because of the poles “melting” so monitoring it is a very good idea.
But out of the need to know basis, the people should do this measuring and monitoring at constant time intervals in order to see a pattern.
Here is an Infographic about the Sea and Oceans depth around the world.
(Click on the image for Full Version)