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U.S. sea level rises faster than in the last 100 years

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According to the latest forecasts, the oceans along the US coastline will rise more rapidly within the next 30 years than in the last 100 years, causing more floods in coastal cities such as Newyork and Miami.


Sea level is expected to rise by as much as 12 inches (30 centimeters) by 2050, according to a report led by the US National Oceanic and Atmospheric Administration.Amounts vary by region, but flooding leads to more Coastal flood It makes tides and storm surges more serious, reports from several agencies said.

“Sea levels continue to rise at a very surprising rate,” NASA administrator Bill Nelson said in a conference call with reporters. “And it puts communities around the world at risk.”

Rising water is threatened Coastal city Floods are already common in New York, Boston, Miami, etc. high tide It happens in the full moon and the new moon. Coastal homes, businesses, highways and other infrastructure are vulnerable to floods and rising sea levels. Approximately 8 million homes with $ 1.9 trillion rebuilding costs are at risk of storm surges, according to a 2021 Core Logic report.

According to NOAA estimates, Manhattan’s sea level could rise by two feet as early as 2055 to 2078, depending on the effects of climate change. Approximately 7,895 people in Manhattan live in the lowlands, causing floods of less than two feet. Sea level rise.

According to the report, floods at high tide have more than doubled in New York since 2000, and now occur 10 to 15 times a year. The annual frequency of floods in Miami, South Carolina and Charleston increased from 0 to 2 days in 2000 and from about 5 to 10 days last year.

“These increases will continue over the next few decades, accelerate further and spread to more locations,” said a report updating sea level forecasts from 2017. The United States uses satellites to measure ice thickness, and sea level is rising. In a statement, White House National Climate Advisor Gina McCarthy said, “This new data on sea level rise is, as the President said, the latest that our climate crisis is flashing’code red’. It’s a reconfirmation. ” “We must double our efforts to reduce greenhouse gases that cause climate change, while helping coastal communities become more resilient in the face of rising sea levels. “

By trapping the heat that melts the ice sheet Greenhouse gas emissions By 2100, it could contribute about two feet of global sea level rise, according to the report. Failure to curb future emissions could raise sea level by another 18 inches to reach 5 feet by the end of the century. The US coast from around North Carolina to Maine is a hotspot for rising sea levels worldwide.

Global warming above 5.5 degrees Fahrenheit (3 degrees Celsius) spurs the rapid melting of the Greenland and Antarctic ice sheets, releasing its water into the ocean. The exact damage is “ice sheet Instability. “

In addition to NOAA, researchers from NASA, the Environmental Protection Agency, the US Geological Survey, the Department of Defense, the Army Corps of Engineers, and the Federal Emergency Management Agency all contributed to the 111-page report.


What causes sea level rise?The report warns that one leg will rise within 30 years and floods will occur more frequently.


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Quote: US sea level has risen at a faster pace than in the last 100 years (February 19, 2022), with February 19, 2022 https://phys.org/news/2022-02-sea-faster-pace Obtained from -years.html.

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U.S. sea level rises faster than in the last 100 years

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