Sea levels along the northeast coast of the U.S. rose by record levels during 2009-2010 due to a major change in the Atlantic Ocean’s wind patterns and warm-water currents. At the time, the unusually high tides caught people by surprise. Climate models suggest that sea level rises may become more frequent this century as global warming alters ocean temperatures. Eight of the top 10 U.S. cities that have seen an increase in coastal flooding are on the East Coast, according to a National Oceanic and Atmospheric Administration report published in August 2014.
This extreme sea level rise is unprecedented in tide gauge records. This is a one-in-850-year event, based on the past records.
Jianjun Yin, study co-author