Sentinel-2 RGB composite Satellite Image (IMAGE) University of Bristol Caption Sentinel-2 RGB composite satellite image of the southwestern Greenland Ice where the Black and Bloom team have been studying glacier algal blooms over the past 4 years. Note the conspicuous 'dark-zone' running top to bottom (north to south) along the ice sheet margin. This darkening is mainly driven by heavily pigmented blooms of glacier algae within surface ice in this location during summer melt seasons, which in turn significantly enhance the surface ice melt of the ice sheet. Credit Dr Joseph Cook Usage Restrictions Single use only - for use with the press release. 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.