The height of the country's average coastal surface increased by 9.9 cm between 1989-2021, with the yearly average growth estimated at 3.53 millimeters (0.12 inch) in the Sea of Japan and 3.08 mm in the Yellow Sea, South Korean news agency reported.
The data provided by the oldest observation post in southwestern city of Mokpo showed that the sea level had jumped by 15.4 cm over past 62 years or by 2.49 mm per year, the report said.
It added that the data had been collected from 21 observation posts in South Korea's coastal areas.
Global mean sea level rose by an average of 2.1 mm per year between 1993 and 2002 and 4.4 mm per year between 2013 and 2021, according to the data provided by the World Meteorological Organization in 2021.