Quote:
Originally Posted by jamesqf
That's just plain wrong. Sea level is defined WRT gravitational equipotential surfaces (plus a small contribution from the centrifugal force of Earth's rotation), NOT distance from the center of the Earth. If the sea level was 8000' higher south of the equator, the water would flow north until the levels equalized.
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Did you read the link? It is all about how measuring mountains above sea level is not very accurate, in telling us how tall they actually are above the center of the earth - or how close they are to space.
There is about 2.5 miles of ice on Antarctica. We have the GRACE satellites that can measure gravity very accurately.