2 days ago · Sea level rise. The global average sea level has risen about 250 millimetres (9.8 in) since 1880. [1] Between 1901 and 2018, average global sea level rose by 15–25 cm (6–10 in), an average of 1–2 mm (0.039–0.079 in) per year. [2] This rate accelerated to 4.62 mm (0.182 in)/yr for the decade 2013–2022. [3]
Elevation of a location in reference to a historic mean sea level taken as a vertical datum
Height above mean sea level is a measure of a location's vertical distance (height, elevation or altitude) in reference to a vertical datum based on a historic mean sea level. In geodesy, it is formalized as orthometric height. The zero level varies in different countries due to different reference points and historic measurement periods. Climate change and other forces can cause sea levels and el... Wikipedia
