“A single flooding event, one that now happens every 4 to 5 years on average in coastal communities in the southeast United States, will happen 4 to 5 times every year,” one NOAA administrator said.
The report predicted 10 to 12 inches of additional sea level rise by midcentury, though projections for specific regions and communities varied because of changes in land height. Some parts of the coastal U.S. are subsiding, while others are experiencing uplift or rebound.
“The United States is expected to experience as much sea level rise in 30 years as we saw over the span of the entire last century,” Rick Spinrad, the NOAA administrator, said. “Current and future emissions matter, but this will happen no matter what we do about emissions.” Rising seas could hamper economies, cause more dramatic flooding, inundate freshwater areas with salt and cause a host of other problems.
Scientists have been narrowing in on ranges for sea level rise, and the new projections are more certain and less tied to future emissions scenarios.our headlights, and we can speak with confidence and clarity about what will occur,” William Sweet, a NOAA oceanographer, said. The report's findings are based on tide gauge data, satellite data, increasingly powerful climate modeling and other coastal monitoring measurements.The East Coast, in general, can expect more sea level rise than average because of coastal subsidence — sinking land.
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