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How many gigatonnes of ice must melt to raise the oceans one millimeter (10-3 meters)?

April 26, 2017Ice melt meters millimeter Oceans raise

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How many gigatonnes of ice must melt to raise the oceans one millimeter (10-3 meters)?

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The number of gigatonnes of water that must be added to the oceans to raise the sea level 1 millimeter is given by: 1 mm / (2.78 microns / Gt) = 10-3 m / (2.78 x 10-6 m / Gt) = 360 Gt Similarly, 360 km³ of water will raise the oceans 1 mm.