Past sea level rise is not captured by models yet, in particular the response from ice sheets in Antarctica due to global warming.

Projections therefore can often be regarded to potentially underestimate future sea level rise.

For example, Overpeck et al. (2006), and Hansen (2007) suggest possibilities which could eventually lead to a nonlinear response from ice sheets – accelerating the current observed sea level rise.

• Projections assessed by the US National Research Council (2010, pages 243-250), including Overpeck et al. 2006 http://books.nap.edu/openbook.php?record_id=12782&page=243
• James Hansen on Sea Level Rise (2007) http://iopscience.iop.org/1748-9326/2/2/024002
• Sea level in the 5th IPCC report (Rahmstorf, 2013) http://www.realclimate.org/index.php/archives/2013/10/sea-level-in-the-5th-ipcc-report/
• IPCC AR 2013 sea level rise discussion http://www.climatechange2013.org/images/uploads/WGIAR5_WGI-12Doc2b_FinalDraft_Chapter13.pdf
• Sea level rise map 6 meters NASA https://commons.wikimedia.org/wiki/File:6m_Sea_Level_Rise.jpg
• Music: The Kyoto Connection – The Way Of Waking Up (feat. Alan Watts) http://freemusicarchive.org/music/The_Kyoto_Connection/Wake_Up_1957/01_Intro_-_The_Way_Of_Waking_Up_feat_Alan_Watts
• Sea level rise https://en.wikipedia.org/wiki/Sea_level_rise