US Coastal Sea Level Will Rise One Foot By 2050, Study Confirms

Sea levels along the United States coast will rise about a foot or more on average by 2050, government scientists said on Tuesday, with ...


Sea levels along the United States coast will rise about a foot or more on average by 2050, government scientists said on Tuesday, with the result that rising waters now seen as a ” harmful flood” will become much more damaging.

A report by researchers from the National Oceanic and Atmospheric Administration and other agencies also found that at the current rate of warming, at least two feet of sea level rise is expected by the end of the century.

“What we are reporting is historic,” NOAA Administrator Richard Spinrad said at a press conference announcing the results. “The United States is expected to experience as much sea level rise over the next 30 years as we have seen over the past century.”

Mr Spinrad said that while reducing greenhouse gas emissions to limit warming was critically important, projected sea level rise by 2050 “will happen, whatever we do in emissions”.

The report is an update of a 2017 study, but includes much more accurate estimates of sea level rise by 2050, the result of improved computer modeling and better scientific understanding of the impact of global warming on the ice caps of Greenland and Antarctica. This “gives more confidence in our ability to predict” effects by mid-century, said William Sweet, an oceanographer with NOAA’s National Ocean Service.

About 40% of the United States population, or about 130 million people, live within 60 miles of the ocean. But sea level rise will not affect them all equally, as it is not uniform.

In the United States, land subsidence and sediment compaction along much of the eastern and Gulf coasts are adding to the increase; in these regions, sea level rise could exceed one foot in the next three decades, the report said.

On the west coast, subsidence and compaction are less common, so sea level rise is expected to be at the lower end of the projections.

For communities on the east and gulf coasts, the expected rise in sea level “will create a sharp increase in the frequency of coastal flooding, even in the absence of storms or heavy rains,” said Nicole LeBoeuf, director. of the National Ocean Service.

Currently, many communities on these coasts regularly experience “harmful” or “sunshine” flooding, when high tides become even higher due to the influence of the moon or other factors. That will change, Dr. Sweet said.

“We definitely anticipate a change in flood regime,” he said.

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Newsrust - US Top News: US Coastal Sea Level Will Rise One Foot By 2050, Study Confirms
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