Kaitlin Keegan, Dartmouth University (IMAGE) Dartmouth College Caption This image shows Kaitlin Keegan, the study's lead author and a Dartmouth doctoral student, examining the melt layers of the Greenland ice sheet at the summit. Credit Kaitlin Keegan Usage Restrictions Credit Kaitlin Keegan 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.