Greenland Proglacial River (image) University of Bristol Share Print E-Mail Caption This photo shows a rhodamine dye injection into the proglacial river, just before a waterfall. The pink dye (the rhodamine) is used to calculate the water discharge of the proglacial river (i.e. how much water/melt if flowing in the river at that time). Credit Jakub D Zarsky 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.