Greenland Delta (IMAGE) University of Colorado at Boulder Caption The study investigates changes to the deltas since the 1940s and up until today. In the period between 1940 and 1980, the deltas did not change much, but as the climate became warmer, the deltas started to grow. The photo on the left shows a delta in West Greenland photographed in 1985 and on the right the same delta in 2010. It clearly shows how the delta has been extended by several kilometres over this 25-year period. Credit Left: Danish Energy Agency. Right: Google Earth. 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.