Here in NYC, for example, we had a massive, destructive hurricane which damaged over 50K homes and
created storm tides up to 15 feet above normal.
In general, the regions of expanding warming upwelling water in the Indian Ocean, North Pacific, or wherever they are, must
create slight bulges in the surface, and the regions of shrinking, cooling, sinking water in the Arctic must
create slight depressions in the sea surface (again, I mean in a very low pass sense — obviously
storms,
tides, etc,
create all kinds of short - terms signals obscuring this).