Global average sea level has risen during the 20^th century by between 1 and 2 mm per year. Satellite measurements suggest the rise was around 3 mm per year between 1993 and 2003.

During the 21^st century it is likely that global average sea level will rise by between 9 and 88 cm, relative to 1990, but will not be uniform around the world.

The anticipated range of relative sea-level rise by the 2080s (relative to the 1961 -  1990 mean) is 20 to 80 cm in south-west England and 0 to 60 cm in Scotland.

MEDIUM