The rising water level is mostly due to a combination of melt water from glaciers and ice sheets and thermal expansion of seawater as it warms. In 2021, global mean sea level was 97 millimeters (3.8 inches) above 1993 levels, making it the highest annual average in the satellite record (1993-present).
How much will the sea level rise by 2050?
12 inches
By 2050, sea level along contiguous U.S. coastlines could rise as much as 12 inches (30 centimeters) above today’s waterline, according to researchers who analyzed nearly three decades of satellite observations.
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