How much sea level rise if all ice melts

The future is not (entirely) set in stone Those findings are in line with a major report earlier this year from the NOAA, which found that sea levels could rise along U.S. coastlines by roughly a foot between now and 2050 — roughly as much change over the next three decades as over the past century.

If all the ice covering Antarctica , Greenland, and in mountain glaciers around the world were to melt, sea level would rise about 70 meters (230 feet).

On a pathway with high greenhouse gas emissions and rapid ice sheet collapse, models project that average sea level rise for the contiguous United States could be 2.2 meters (7.2 feet) by 2100 and 3.9 meters (13 feet) by 2150.