Digging Below the Ice (video) The Earth Institute at Columbia University Share Print E-Mail Loading video... Caption Lead author Joerg Schaefer explains how his team concluded that Greenland has melted in the past, and addresses the implications for potential modern sea-level rise. Credit Columbia University Usage Restrictions Credit must be given. Share Print E-Mail 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.