Scientists Warn Future , Sea Level Rise , May Be Worse Than Current Projections.br CNN reports that scientists have discovered that the , Antarctic ice sheet is melting , in a new, concerning way. .br According to a new study, current projections , may be significantly underestimating , future sea level rise. .br The ice sheet's "grounding line" is br the point at which ice rises from br the seabed and begins to float.br Warm ocean water is seeping beneath this br grounding line and causing accelerated melting br which could push the process to a tipping point.br The team's findings were published br in the journal 'Nature Geoscience.'.br CNN reports that a tipping point is defined br as a threshold at which small changes accumulate, br pushing a system beyond the point of no return.br The new study found that even a small br increase in ocean temperatures can have a br significant impact on the speed of melting. .br You get this kind of runaway br feedback, where you can have br a very sudden shift in br how much melting is br happening in these places, Alex Bradley, Ice dynamics researcher at BAS br and lead author of the paper, via CNN.br Alex Bradley, an ice dynamics researcher br at BAS and lead author of the paper, suggests , “our projections of sea level rise might br be significant underestimates.".br According to the study, the implications would be noticeable immediately, with higher sea levels br threatening coastal areas around the world. .br According to the study, the implications would be noticeable immediately, with higher sea levels br threatening coastal areas around the world.