Rob DeConto in Antarctica (IMAGE) University of Massachusetts Amherst Caption New climate modeling by Robert DeConto at UMass Amherst and David Pollard at Penn State suggests that the Intergovernmental Panel on Climate Change's most recent estimate for sea-level rise over the next 100 years could be too low by almost a factor of two. Credit UMass Amherst Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.