Graph of the Day: Global Mean Sea Level, 1870-2004

We have used a combination of historical tide-gauge data and satellite-altimeter data to estimate global averaged sea level change from 1870 to 2004. During this period, global-averaged sea level rose almost 20 cm, with an average rate of rise of about 1.7 mm/yr over the 20th Century. The sea level record indicates a statistically significant increase in the rate of rise between 1870 to 2004 (data from Dr Jeff Donnelly, WHOI Coastal System Group, Donnelly et al., 2004).

Historical sea level changes via Deltoid