Blackened ice (IMAGE) Aarhus University Caption The algae blackens the ice. When that happens the ice reflects less sunlight and melts faster. Several areas in Greenland are covered with black algae. Credit Laura Perini Usage Restrictions May only be used in communicating this story. 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.