As ice piles up miles deep on land, there is less water covering the rest of the planet.
We know that sea levels have fluctuated in the distant past - at one time the Midwest was an inland sea and Florida was under water. At other times sea level was lower than it is now - we know from city ruins hundreds of feet underwater.
GW models show levels rising, that's "settled science", they say.
Could be they're full of it.
Not to mention the mile thick glacier, covering half of the
northern US, that melted 10,000
years ago, which gave us the
great lakes. The Laurentide
ice sheet.