funfact: because water itself has weight, it produces gravity, therefore it pulls more water towards itself, therefore more water collects in some parts of the world than other.

for example: most of the extra water that comes from global warmings, collects at the pacific because it has a larger surface, therefore US Eastcoast and Europe see very little change in sealevel, while some pacific islands are already gone.

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epistemic status: I remember reading this info a couple years ago, but the best source I can found now is that sentence from wikipedia:

Changing ice masses also affect the distribution of sea water around the globe through gravity en.wikipedia.org/wiki/Sea_level_rise