Northern Greeland ice sheet (IMAGE) University of Copenhagen - Faculty of Science Caption The Greenland ice sheet is enormous, making up nearly half of all fresh water in the northern hemisphere. But rising temperatures on Earth are causing it to melt – and the world's oceans to rise. As such, the ice sheet’s movements are closely monitored. Credit Photo: Baptiste Vandecrux (GEUS). Usage Restrictions none License Original 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.