Sea levels worldwide rose an average of nearly 3 inches (8 cm) since 1992, the result of warming waters and melting ice, a panel of NASA scientists said on Wednesday. In 2013, a United Nations panel predicted sea levels would rise from 1 to 3 feet (0.3 to 0.9 meters) by the end of the century. The new research shows that sea level rise most likely will be at the high end of that range, said University of Colorado geophysicist Steve Nerem.
Sea levels are rising faster than they did 50 years ago and “it’s very likely to get worse in the future,” Nerem said. The changes are not uniform. Some areas showed sea levels rising more than 9 inches (25 cm) and other regions, such as along the U.S. West Coast, actually falling, according to an analysis of 23 years of satellite data.
Scientists believe ocean currents and natural cycles are temporarily offsetting a sea level rise in the Pacific and the U.S. West Coast could see a significant hike in sea levels in the next 20 years.
“People need to understand that the planet is not only changing, it’s changed,” NASA scientist Tom Wagner told reporters on a conference call.
“If you’re going to put in major infrastructure like a water treatment plant or a power plant in a coastal zone ... we have data you can now use to estimate what the impacts are going to be in the next 100 years,” Wagner said.
