I’ve just learned that different parts of the ocean can have different levels. How does this work? If I drop water into a cup, the entire level of water in the cup rises. How is this not true for the ocean? Are their just parts of the ocean that are uneven? Where do they meet?
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When thinking about sea level or tides and currents, a few things drive the sea as a whole. Wind, water temperature, gravity.
Gravity’s influence on tidal level according to Degrasse Tyson can be thought of the earth( solid part) kind of getting pulled, by the moon, back and forth within the body of water. It’s not that the sea actually rises or falls. The earth is pulled in the water. There is a video on YouTube where he talks about it.
Wind and temperature just compound all of this in various ways.
If you’re asking if the polar ice melting creates deeper water in that region? I guess it could very slightly and it evens out over time.
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