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How much land floods if the sea rises, or seafloor dries if it falls?

The share of land flooded by a rise in sea level, or of seafloor laid dry by a fall, from ETOPO 2022 terrain.

m

A rise is positive and a fall is negative. Today’s sea level is 0. From −10,935 to 8,848 m.

Today’s land lost

2.25 %

If the sea rose by 10 m, 2.25 % of today’s land would be underwater, and 28.6 % of Earth’s surface would still be land.

Land left
28.6 %

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How it is worked out

flooded: land_share = interp(LAND, change_m)land_lost = (LAND(0) - land_share)/LAND(0), LAND(0) = 0.29225348 (ETOPO 2022)

Where the numbers come from

Keep in mind

Assumes the ice sheets melt as the sea rises (their beds count as land once uncovered); static flooding of today’s terrain, no tides or rebound.

Address
https://clipwright.studio/tools/sea-level-rise?change_m=10

Anyone who opens this address sees the same answer.

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