Relative to 1980-2009, the mean sea level rises by 0.25–0.60 meters under the RCP4.5 (the concentration of carbon is at an average of 4.5 watts per square meter across the planet) greenhouse gas trajectory and 0.35–0.76 meters for RCP8.5 (the concentration of carbon is at an average of 8.5 watts per square meter across the planet). Under the ‘high-emissions’ RCP8.5 greenhouse gas trajectory, sea levels increase by 0.45–1.02 meters by 2100.