News Earth Sea level rise overflowing estimates Feedback mechanisms are speeding up ice melt By Tanya Lewis November 8, 2012 at 12:45 pm - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Click to share on X (Opens in new window) X Click to print (Opens in new window) Print Sea levels may swell much higher than previously predicted, thanks to feedback mechanisms that are speeding up ice melt in Greenland and Antarctica. Global warming feedbacks are speeding up the rise of sea level, which is expected to rise 1 meter by 2100.