Projected Sea Level Rise and Flooding by 2050
The amount of sea level rise (SLR) by 2050 will vary along different stretches of
the U.S. coastline and under different SLR scenarios, mostly due to land subsidence or uplift
(Ch.2: Our Changing Climate).
panels show feet of sea level above 1992 levels at different tide gauge stations based on a) an 8
inch SLR and b) a 1.24 foot SLR by 2050. The flood level that has a 1% chance of occurring
in any given year (“return level”) is similarly projected to differ by region as a result of varying
storm surge risk. Panel c) shows return levels for a 1.05 foot SLR above mean high tide by 2050.
Finally, panel d) shows how a 1.05 foot SLR by 2050 could cause the level of flooding that
occurs during today’s 100-year storm to occur more frequently by mid-century, in some regions
as often as once a decade or even annually. (Figure source: replicated Tebaldi et al.
b); data/ensemble SLR projections used for panels c) and d) from Tebaldi et al.