Satellite Image of the Dark Zone (image) CAGE - Center for Arctic Gas Hydrate, Climate and Environment Share Print E-Mail Caption Satellite images of the dark zone of Greenland ice sheet clearly show the impure ice in remarkable contrast to the pristine snow. Satellites however miss out on details in the composition of the impurities. Credit MODIS/NASA Usage Restrictions None Share Print E-Mail 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.